The On-Board Diagnostic system, specifically OBD2, is a critical component of modern vehicles, playing a vital role in emission control and vehicle diagnostics. For anyone involved in vehicle maintenance, repair, or emission testing, understanding OBD2 is essential. This guide provides a comprehensive overview of OBD2 testing, its standards, and common issues encountered during Smog Check inspections. This information is crucial for technicians, inspectors, and vehicle owners alike to ensure vehicles meet emission standards and operate efficiently.
OBD2 and Smog Check Inspections: What You Need to Know
Smog Check inspections are mandated in many regions to ensure vehicles meet specific emission standards. A significant portion of these inspections relies on the On-Board Diagnostic (OBD) system, specifically OBD2, to verify the functionality of a vehicle’s emission control systems. This section outlines the pass/fail criteria for the OBD test portion of a Smog Check, providing clarity on the standards and procedures involved.
Readiness Monitor Standards for OBD2 Testing
Readiness monitors are self-tests performed by the vehicle’s OBD2 system to confirm that emission control systems are functioning correctly. These monitors run various diagnostics during normal driving conditions. However, some vehicles may require specific driving patterns or operating conditions to complete all monitors. Vehicle owner’s manuals sometimes include drive cycle procedures to expedite monitor completion, but this information is often only readily available to the vehicle manufacturer (OEM) or within specialized repair industry literature.
Completing drive cycles necessitates specific driving conditions, including particular speeds, temperatures, pressures, and engine loads. Achieving these conditions in normal traffic may be challenging, potentially requiring dynamometer equipment for controlled testing. Furthermore, properly functioning vehicle components are crucial for monitor completion. A vehicle may fail to complete monitors if underlying component issues prevent the tests from running. It’s also important to note that readiness monitors reset and must be rerun after any repair work that involves disconnecting the vehicle’s battery or replacing emission-related components.
The table below details the number of incomplete OBD readiness monitors permitted to pass the OBD test during a Smog Check inspection, based on vehicle model year and fuel type.
| Model Year | Fuel Type | Number of Incomplete Monitors Allowed to Pass OBD Test¹ |
|---|---|---|
| 1996-1999 | Gas² | Any one³ |
| 2000 and newer | Gas² | Evaporative system³ |
| 1998-2006 | Diesel | Zero |
| 2007 and newer | Diesel | Particulate Filter and Non-Methane HydroCarbon (NMHC)⁴ |
¹ Implemented May 4, 2015.
² “Gas” includes gasoline, propane, natural gas (CNG, LNG, LPG).
³ The misfire, fuel, and comprehensive component continuous monitors are disregarded during an OBD test on “gas” vehicles.
⁴ Implemented July 5, 2023.
Malfunction Indicator Lamp (MIL) Standards in OBD2 Inspections
The Malfunction Indicator Lamp (MIL), often referred to as the “Check Engine” light, is a key indicator in OBD2 testing. The MIL signals potential emission-related issues detected by the vehicle’s OBD2 system. The following table outlines the pass/fail standards related to the MIL during a BAR-97 and OIS (Smog Check inspection systems) inspection.
| Vehicle | Pass/Fail | Standard |
|---|---|---|
| All with OBDII | Pass | MIL illuminates when the key is turned to the “on” position, engine off (KOEO). |
| All with OBDII | Pass | MIL turns off when the engine is running (KOER). |
| All with OBDII | Fail | MIL does not illuminate when the key is turned to the “on” position, engine off (KOEO). |
| All with OBDII | Fail | MIL illuminates when the engine is running (KOER). |
OBD2 Communication Standards for Smog Checks
Successful communication with the vehicle’s OBD2 system is paramount for a Smog Check inspection. Failure to communicate can stem from various issues, including a damaged OBD connector, wiring problems, aftermarket stereo installations interfering with the system, or even the vehicle’s computer sending invalid data. It’s crucial to diagnose and resolve communication issues to proceed with the OBD test.
The communication standards for the OBD test portion of BAR-97 and OIS inspections are detailed below:
| Vehicle | BAR-97/OIS | Standard |
|---|---|---|
| All with OBDII | BAR-97 | Vehicle successfully communicates with the BAR-97 testing equipment. |
| All with OBDII | OIS | Vehicle successfully communicates with the OIS and transmits the required data.¹ |
¹ Required data typically includes information from OBD addresses: Mode $01 PID $00, Mode $01 PID $01. Mode $01 PID $00 indicates the data supported by the vehicle, while Mode $01 PID $01 provides MIL status, diagnostic trouble codes (DTCs), and monitor status.
Permanent Diagnostic Trouble Code (PDTC) Standards in OBD2 Testing
Since July 1, 2019, Smog Check inspections using the BAR-OIS system include a check for Permanent Diagnostic Trouble Codes (PDTCs). PDTCs are similar to regular Diagnostic Trouble Codes (DTCs) but are more persistent. Unlike regular DTCs, PDTCs cannot be erased using a scan tool or by disconnecting the vehicle’s battery. They are designed to remain until the OBD2 system itself verifies that the underlying issue has been resolved and clears the code automatically.
The PDTC standards for the OBD test portion of an OIS inspection are as follows:
| Model Year | BAR-97/OIS | Standard |
|---|---|---|
| 1996-1999 | BAR-97 | Not applicable. |
| 2000-2009 | OIS | Not applicable. |
| 2010 and newer ¹ | OIS | Vehicles fail the Smog Check if a PDTC is present. ²,³,⁴,⁵ |
¹ Some 2010 vehicles may not support PDTCs and are therefore exempt from the PDTC check.
² A vehicle with a stored PDTC will fail the PDTC check regardless of the MIL status (whether commanded ON or OFF).
³ PDTC presence is disregarded if the vehicle has completed at least 15 warm-up cycles and has been driven at least 200 miles since the last OBD data clearing (as determined by Mode $01 PID $30 and $31).
⁴ The Bureau of Automotive Repair (BAR) is aware of certain vehicles that experience issues with clearing specific PDTCs and is collaborating with the California Air Resources Board (CARB) to address these issues with vehicle manufacturers. Until solutions are implemented, these problematic codes will be ignored by BAR-OIS. Further details are available in the “Permanent Diagnostic Trouble Code Vehicles of Interest” section.
⁵ Vehicle manufacturers have issued extended warranties, recalls, and repair campaigns for some vehicles known to have PDTC clearing problems. These vehicles are listed under “Permanent Diagnostic Trouble Code Vehicles of Interest“. If a vehicle fails due to a PDTC and is listed, refer the vehicle owner to a dealership for potential covered repairs.
Modified Software Standards and OBD2 Compliance
Since July 19, 2021, Smog Check inspections using BAR-OIS have incorporated a check for modified software. Software modifications that are approved through a California Air Resources Board (CARB) Executive Order are permissible and should not cause a vehicle to fail the inspection. However, vehicles identified with illegally modified software will fail the Smog Check. The inspection report will indicate “Modified Software” as the reason for failure.
To pass a subsequent inspection, the vehicle must be restored to an OEM-approved or CARB-approved software configuration. Retesting can be done at any licensed Smog Check station unless BAR directs the vehicle to a Referee or STAR station. Vehicle owners who wish to dispute inspection results can contact the Smog Check Referee at (800) 622-7733 or visit https://asktheref.org/.
Common OBD2 Testing Issues and Vehicle-Specific Guidance
Certain vehicle models are known to have recurring issues with OBD2 testing during Smog Check inspections. These issues can include communication problems, incomplete readiness monitors, OBD test incompatibility, or false MIL illumination. In many instances, the OIS inspection system is programmed to accommodate these known vehicle anomalies. However, in some cases, vehicle repair may be necessary to resolve the underlying issue.
The following sections provide detailed information on vehicles of interest, categorized by the type of OBD2 issue they commonly exhibit. This information is invaluable for Smog Check inspectors and technicians in diagnosing and addressing OBD2 related challenges.
OIS Vehicles of Interest: Addressing OBD Test Anomalies
This section lists gasoline, flex-fuel (model year 2000 and newer), and diesel (model year 1998 and newer) vehicles with known issues related to the OBD test portion of an OIS inspection.
| Make | Year | Model Engine (L); Fuel Type | Issue | Cause and Possible Remedy | Instruction to Inspector |
|---|---|---|---|---|---|
| Audi | 2000-2004 | A4 & A6 | Fail for no OBD communication. No response or Only Transmission Control Module responds to DADs requests. ABS and/or brake lamp illuminated in instrument panel cluster. | Broken ground bond wire in ABS module causes diagnostic communication issues with the ABS module, ECM, and TCM. Diagnose and repair per Audi TSB #A45-15-10. | Likely broken vehicle. Repair and retest. |
| BMW | 6/1/99 – 7/31/00 | 323i Sedan | May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. | DME Software error. Reprogram DME with the updated software. | Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions. |
| BMW | 9/3/99 – 7/31/00 | 323iT Touring | May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. | DME Software error. Reprogram DME with the updated software. | Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions. |
| BMW | 6/1/99 – 7/29/00 | 323Ci Coupe | May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. | DME Software error. Reprogram DME with the updated software. | Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions. |
| BMW | 6/23/99 – 7/29/00 | 323 Cic Convertible | May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. | DME Software error. Reprogram DME with the updated software. | Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions. |
| BMW | 2000 | M52 (TU) engine | May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. | DME Software error. Reprogram DME with the updated software. | Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions. |
| BMW | 2000 | Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. | Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000. | Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set. | |
| BMW | built 3/98 – 7/99 | 323i, 323iA, 328i, 328iA | Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. | Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000. | Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set. |
| BMW | built 2/99 – 7/99 | 328iC, 328iCA, 323iC, 323iCA, 528i, 528iA, 528iT, 528iAT | Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. | Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000. | Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set. |
| BMW | built 9/98 – 7/99 | Z3 roadster 2.3 | Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. | Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000. | Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set. |
| BMW | built 4/99 – 7/99 | Z3 roadster coupe/ roadster 2.8 | Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. | Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000. | Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set. |
| BMW | 2001-2003 | Z3 M Roadster/coupe with S54 engine | Fail for no communication when ignition switched off/on. OBD communication always possible with BMW DIS or GT1 tester. | Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles. Bulletin #SI B12 11 06 dated October 2007. | Follow OIS prompts. Connect/disconnect DAD when key off. |
| BMW | 2000-2003 | Z8 & M5 with S62 engine | Fail for no communication when ignition switched off/on. OBD communication always possible with BMW DIS or GT1 tester. | Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles. Bulletin #SI B12 11 06 dated October 2007. | Follow OIS prompts. Connect/disconnect DAD when key off. |
| BMW | From series intro. up to 8/27/2004 | M3 with S54 engine | Fail for no communication when ignition switched off/on. OBD communication always possible with BMW DIS or GT1 tester. | Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles. Bulletin #SI B12 11 06 dated October 2007. | Follow OIS prompts. Connect/disconnect DAD when key off. |
| BMW | 2003 | M3 | Failure to set EGR monitor. | Check thermostat | Likely broken vehicle. Repair and retest. |
| BMW | 2007 | 328i | Engine dies during OBD Test, won’t restart. | Separate the vehicle and key. Wait 20+ minutes. Attempt to restart. | Test normally. BAR-OIS will not request Cal ID or CVN. Possible keyless ignition related issue. The vehicle will recover by just letting it sit for 20+ minutes with the wireless key fob out of range of the vehicle. |
| Chevrolet | 1998-2005 | DIESEL C/K2500 & C/K3500 (including Silverado and Suburban), G30, G3500 (including Sport Van, Express Cut-Away & Cargo), P30 | Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. | Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. | Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option. |
| Chevrolet | 1999-2005 | 3500 W35042 (box truck) [GVWR 10,001 – 14,000] (diesel) [Federal certified] | Vehicle is not equipped with OBD II. | OBD not installed in federals during these years. | OIS programmed to skip the OBD functional test. |
| Chevrolet | 2000-2002 | S-10 (2WD), 2.2L I-4 (E85) | Monitors won’t set on certain flex fuel models, VINs listed below. YGMXT02.2121 YGMXT02.2122 1GMXT02.2122 2GMXT02.2122 YGMXT02.2121 YGMXT02.2122 (VIN 8th digit: 5) | System monitors disabled for operation > E15 blends: O2 Sensor Heater, Secondary Air, Catalyst. System monitors disabled for operation > E10 blends: Evaporative leak check. Desensitized O2 Senor monitor implemented; only reports faults during operation E15 blends. | OIS ignores all 11 readiness monitors. |
| Chevrolet | 2000-2005 | Suburban, Silverado, Express, Avalanche (gasoline) [Federal certified] | Message appears during OIS OBD II test stating, “Unable to confirm this Vehicle’s OBD II requirements. Does this vehicle have OBD II?” | Federally certified vehicle may not be certified to OBD II standards. | Check under-hood emission label to determine OBD certification status. Enter correct result into OIS and follow OIS prompts. OIS may state a BAR-97 test is required on vehicles without OBDII. |
| Chevrolet | 2001 | Silverado / Tahoe C/K 1500 | Failure to set secondary air system monitor. | Possible air injection problem (check valve(s), vacuum line, pump, air passages). | Diagnose. Repair and retest. |
| Chevrolet | 2002 | Silverado C/K 2500HD (diesel) | Failure to set EGR monitor. | Difficult drive cycle. | OIS reprogrammed 10/13/2016 to allow monitor to be incomplete. |
| Chevrolet | 2001-2002 | Cavalier CNG First VIN digit “3” (built in Mexico) | Failure to set CAT monitor. | Vehicle design anomaly. | OIS reprogrammed 02/11/2015 to allow any one monitor to be incomplete. |
| Chevrolet | 2019 | Express 2.8L (diesel) [California certified] | Exhaust Gas Sensor monitor will not complete. A Particulate Matter sensor fault may not set DTC or illuminate MIL. | The Engine Control Module (ECM) may not properly handle diagnostic information for the exhaust Particulate Matter (PM) sensor. Dealers are to reprogram the ECM per Emission Recall N232408230. | Vehicle requires reflash. Perform recall then retest. |
| Chrysler | 1999-2000 | Town & Country with 3.0L engine built after 12/1/1998 | EGR Monitor will not complete at high altitude. | Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00. | Vehicle requires reflash. Repair per TSB, run monitors then retest. |
| Chrysler | 2000 | Town and Country 3.3L V-6 (E-85) | Readiness monitors will not set on certain flex fuel models, VINs listed below. WCRXT03.32BP (VIN 8th digit: G) | All monitors disabled for operation >E30 and ethanol fuel content learning. | OIS ignores all 11 readiness monitors. |
| Chrysler | 2003 | PT Cruiser 2.4 liter DOHC 16v turbocharged (sales code EDV) with 5- spd manual G288 trans (sales code DDD) | Failure to set catalyst monitor. | PCM software error. Dealer must reprogram PCM. Emissions warranty extended to lifetime for this issue. Diagnose and repair per TSB #18-112-16. Possible repair payment reimbursement, see warranty D-16-26. | Vehicle requires reflash. Repair per TSB and retest. |
| Chrysler | 2010 built prior to 2/20/2010 | 300, Charger, Challenger 3.5L (5 speed automatic transmission) | Fail for monitor readiness, Or MIL illumination: P0456, P0452, P1115. | Reflash available. See Chrysler TSB #18-008-10 | Vehicle requires reflash. Repair per TSB and retest. |
| Dodge | 1998-2002 | Ram Truck 5.9L (Cummins diesel) [California certified] | Some continuous monitors will not complete. | Vehicle design anomaly. | Test normally. BAR-OIS allows one incomplete continuous monitor. |
| Dodge | 1998-2006 | Ram 2500, Ram 3500 (diesel) [Federal certified] | Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. | Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. | Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option. |
| Dodge | 1999-2000 | Caravan with 3.0L engine built after 12/1/1998 | EGR Monitor will not complete at high altitude. | Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00. | Vehicle requires reflash. Repair per TSB, run monitors then retest. |
| Dodge | 2003 | Dakota, Durango and Ram Trucks with 4.7L engine [California or 50 state certified] | Catalyst monitor readiness status shows as not supported. | Broken vehicle, repair per TSB #18-032-10 with lifetime warranty. | Test normally. OIS ignores unsupported monitors. |
| Dodge | 2003 | Ram Truck 5.9L (Cummins diesel) [California certified] | MIL light is commanded on, but check engine light is not illuminated and no DTCs are stored. | Vehicle design anomaly Recall campaign #K01 for ECM reflash applies to California certified vehicles only. | Test normally. OIS ignores MIL Command if no DTCs are present on this vehicle Advise motorist of Recall Campaign #K01 if the vehicle is California certified. |
| Dodge | 2003-2004 | 25004X2 and Sprinter 35004X2 (diesel) [2003 Federal certified] [2004 Federal certified] | Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. | Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. | Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option. |
| Dodge | 2004-2005 built after 12/7/2003 | Ram Truck 5.9L (Cummins diesel) [California certified] | Comprehensive component monitor will not complete. | Vehicle design anomaly Re-flash available per TSB #18-030-10 with lifetime warranty per TSB #18-003-11. | Test normally. OIS allows one incomplete readiness monitor. Advise motorist of fix with lifetime warranty per TSB #18-003-11. |
| Dodge | 2004-2006 | 2500 3500 Sprinter (diesel) | EGR/VVT monitor will not complete. | ECU software error. | Test normally. OIS will ignore EGR/VVT monitor. |
| Dodge | 2005 | Ram Truck 5.9L (Cummins diesel) [Federal certified] | Misfire and Comprehensive Components monitors will not complete. | Vehicle design anomaly. | Test normally. OIS ignores misfire and comprehensive component monitor readiness. |
| Dodge | 2006-2007 | Ram Truck 5.9L, 6.7L (Cummins diesel) [California certified] | Fuel System and Comprehensive Components monitors will not complete. | Recall campaign #K01 for ECM reflash applies to California certified vehicles only. | Test normally. OIS ignores fuel and comprehensive component monitor readiness. Advise motorist of Recall Campaign #K01 if the vehicle is California certified. |
| Dodge | 2006-2007 | Ram Truck with 5.9L (ETC or ETH) built after 1/1/06, [Federal Certified], Cab Chassis with 6.7L (ETJ) built before 1/11/07 (Cummins diesel) [Federal certified] | Fuel System and Comprehensive Components monitors will not complete. | TSB #18-017-10 for ECM reflash applies to Federal certified vehicles only. | Test normally. OIS ignores fuel and comprehensive component monitor readiness. Advise motorist of TSB #18-017-10 if the vehicle is Federal certified. |
| Dodge | 2010 built before 2/20/10 | 300, Charger, Challenger 3.5L (5 speed automatic transmission) | Evaporative monitor will not set. | Evaporative leak detection monitor may not set to ready. | Test normally. Inform consumer of TSB #18-008-10 Revision A. |
| Dodge/Ram | 2010-2015 | 2500 & 3500 6.7L (diesel) [California certified] | NOx after-treatment monitor will not complete. | Vehicle design anomaly. | Test normally. BAR-OIS temporarily allows NOx after-treatment monitor to be incomplete until vehicle manufacturer remedy is available. |
| Dodge/Ram | 2014 | ProMaster 2500 & 3500 High 3.0L (diesel) [California certified] | Exhaust Gas Sensor monitor will not complete. | Vehicle design anomaly. Dealers are to perform Recall V97 and ZC0. | Vehicle requires reflash. Perform recall then retest. |
| Dodge/Ram | 2015 | ProMaster 1500, 2500, & 3500 High & Standard 3.0L (diesel) [California certified] | Exhaust Gas Sensor monitor will not complete. | Vehicle design anomaly. Dealers are to perform Recall V97 and ZC0. | Vehicle requires reflash. Perform recall then retest. |
| Dodge/Ram | 2016 | ProMaster 2500 & 3500 High 3.0L (diesel) [California certified] | Exhaust Gas Sensor monitor will not complete. | Vehicle design anomaly. Dealers are to perform Recall V97. | Vehicle requires reflash. Perform recall then retest. |
| Ford | 1998-2003 | Truck 7.3L (diesel) | Engine could shut off when requesting Mode $09 data with aftermarket scan tool. | Vehicle design anomaly. | Test normally. OIS programmed to skip Mode $09 data request on these vehicles. |
| Ford | 1998-2004 | F250, F350, E350, E450, E Super Duty, Econo Commercial S- Duty, Econo RV S- Duty (diesel) [Federal certified] | Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. | Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. | Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option. |
| Ford | 2000-2004 | F250, F350, E350, Excursion (gasoline) [Federal certified] | Message appears during OBD II test stating, “Unable to confirm this Vehicle’s OBD II requirements. Does this vehicle have OBD II?” | Federally certified vehicle may not be certified to OBD II standards. | Check under-hood emission label to determine OBD certification status. Enter correct type into OIS and follow OIS prompts. OIS may state a BAR-97 test is required on vehicles without OBDII. |
| Ford | 2003 | Focus | Fail for readiness. | Monitors may be difficult to complete. | Broken Vehicle. Reflash PCM per TSB #06-7-5. Then test normally. |
| Ford | 2004 | E350 Super duty 5.4 (gas) | Failure to set CAT monitor. | Vehicle design anomaly Recall #15E06 dated 1/13/2016 may apply. Reflash ECM so CAT monitor will set. | Vehicle requires reflash. Repair per recall and retest. |
| Ford | 2011 | Edge, Explorer 3.5L & 3.7L | Vehicle fails for readiness. Some vehicles do not set readiness monitors. | Some vehicles clear the OBD-II diagnostic data on every engine start and/or incorrectly report the VIN. Reprogram or update vehicle’s calibration. Perform monitor drive cycle. | Please consult Ford Emission Recall #13E04 for applicability. Owner must ensure recall is performed if required and all monitor drive cycles are completed prior to Smog Check testing. |
| Ford | 2013-2016 | F series, Super Duty 6.7L (diesel) | Exhaust Gas Sensor monitor will not complete. | After DOC or DPF replacement on vehicles , EGS monitor will not run until degreening strategy completes (up to 6,000 to 10,000 miles). | Test normally. OIS will ignore incomplete EGS monitor on certain VINs provided by Ford where the DOC or DPF were replaced after January 1, 2022. Other vehicles are currently under investigation. Expires 10/8/2025. |
| Ford | 2015-2019 | Transit 3.2L (diesel) | Exhaust Gas Sensor monitor will not complete. | After DOC or DPF replacement, EGS monitor will not run until degreening strategy completes (up to 6,000 to 10,000 miles). | Test normally. OIS will ignore incomplete EGS monitor on certain VINs provided by Ford where the DOC or DPF were replaced after January 1, 2022. Other vehicles are currently under investigation. Expires 10/8/2025. |
| Ford | 2020-2022 | Escape; all engines; Gasoline and hybrid | Might not communicate with BAR-OIS. | Design issue. Software update available. | Test normally. If the vehicle you are inspecting fails the OBD test for no communication, direct the vehicle to a Ford dealership for a software update. Issue may be due to software in gateway module—see SSM 50974. Similar messaging will be displayed on the OIS during the inspection, and printed on the VIR for consumers. |
| Ford | 2021-2022 | Bronco Sport; all engines; Gasoline (not hybrid) | Might not communicate with BAR-OIS. | Design issue. Software update available. | Test normally. If the vehicle you are inspecting fails the OBD test for no communication, direct the vehicle to a Ford dealership for a software update. Issue may be due to software in gateway module—see SSM 50974. Similar messaging will be displayed on the OIS during the inspection, and printed on the VIR for consumers. |
| Ford | 2021-2023 | E350, E450; all engines; Gasoline (not hybrid) | Might not communicate with BAR-OIS. | Design issue. Software update available. | Test normally. If the vehicle you are inspecting fails the OBD test for no communication, direct the vehicle to a Ford dealership for a software update. Issue may be due to software in gateway module—see SSM 50974. Similar messaging will be displayed on the OIS during the inspection, and printed on the VIR for consumers. |
| Ford | 2025 and newer | Explorer (2.3L) AWD, RWD. Test Group SFMXT02.34K2. | Fail for no OBD communication. | Vehicle has OBDonUDS. DAD 1.0 units will not communicate with OBDonUDS vehicles. | Cal-VIS software programmed to skip the OBD test until DAD 2.0 units are BAR certified. |
| Freightliner | 1998-2004 | M Line Walk In Van [GVWR 6,001-14,000] (diesel) [Federal certified] | Vehicle is not equipped with OBD II. | OBD not required in federally certified vehicles in this GVWR range during these years. | OIS programmed to skip the OBD functional test. |
| Freightliner | 2004-2006 | Sprinter (diesel) | EGR/VVT monitor will not complete. | ECU software error. | Test normally. OIS will ignore EGR/VVT monitor. |
| GM | 2000 – 2008 | Various models, and Silverado 1500 | OIS prompts for no vehicle voltage. | No power on vehicle’s OBDII connector (DLC pin 16). Possible blown fuse. | Use auxiliary DAD cables / power supply per DAD manufacturer’s instructions. |
| GM | 2015-2017 | All gasoline powered | Fail for readiness. | Post catalyst oxygen sensor monitor will not run until after 1,000 mile catalyst break in. See Bulletin #15-NA-010. | Inspect vehicle after 1,000 miles or send to Referee. |
| GMC | 1998-2005 | DIESEL C/K2500 & C/K 3500 (including Suburban and Sierra), Savana G3500, Workhorse P30 Forward Cntl | Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. | Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. | Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option. |
| GMC | 1999-2005 | W3500 W35042 (box truck) [GVWR 10,001 – 14,000] (diesel) [Federal certified] | Vehicle is not equipped with OBD II. | OBD not required in federally certified vehicles in this GVWR range during these years. | OIS programmed to skip the OBD functional test. |
| GMC | 2000-2002 | Sonoma (2WD), 2.2L I-4 (E85) | Monitors won’t set on certain flex fuel models, VINs listed below. YGMXT02.2121 YGMXT02.2122 1GMXT02.2122 2GMXT02.2122 YGMXT02.2121 YGMXT02.2122 (VIN 8th digit: 5) | System monitors disabled for operation > E15 blends: O2 Sensor Heater, Secondary Air, Catalyst. System monitors disabled for operation > E10 blends: Evaporative leak check. Desensitized O2 Senor monitor implemented; only reports faults during operation E15 blends. | All 11 readiness monitors ignored in OIS. |
| GMC | 2000-2005 | Sierra, Yukon, Savana (gasoline) [Federal certified] | Message appears during OIS OBD II test stating, “Unable to confirm this Vehicle’s OBD II requirements. Does this vehicle have OBD II?” | Federally certified vehicle may not be certified to OBD II standards. | Check under-hood emission label to determine OBD certification status. Enter correct type into OIS and follow OIS prompts. OIS may state a BAR-97 test is required on vehicles without OBDII. |
| GMC | 2002 | Sierra C/K 2500HD (diesel) | Failure to set EGR monitor. | Difficult drive cycle. | OIS reprogrammed 10/13/2016 to allow monitor to be incomplete. |
| GMC | 2019 | Savana 2.8L (diesel) [California certified] | Exhaust Gas Sensor monitor will not complete. A Particulate Matter sensor fault may not set DTC or illuminate MIL. | The Engine Control Module (ECM) may not properly handle diagnostic information for the exhaust Particulate Matter (PM) sensor. Dealers are to reprogram the ECM per Emission Recall N232408230. | Vehicle requires reflash. Perform recall then retest. |
| GMC | 2022 | Sierra K2500 SLT 6.6L (diesel) [California certified] | Exhaust Gas Sensor monitor will not complete. | Vehicle design anomaly. | Test normally. BAR-OIS temporarily allows Exhaust Gas Sensor monitor to be incomplete until vehicle manufacturer remedy is available. |
| Hyundai | 2002 | Sonata | Fail for readiness. | Monitors are difficult to complete; perform drive cycle two times. | Run drive cycle. See TSB #02-36-030. |
| Hyundai | 2003 | Tiburon | Will not communicate with generic OBD test equipment. | Pin 5 not grounded. Ground pin 5 by jumping to pin 4 in DLC per TSB. | Test normally on OIS. If using generic OBD test equipment, perform recall campaign #057 and Hyundai TSB #03-01-003-01. |
| Infiniti | 2000 -2001 | I30 | Failure to set catalyst monitor. | Only OEM scan tool shows OBD catalyst code. | Test catalyst and replace if defective. |
| Infiniti | 2000 -2001 | I30 | Fail for readiness. | Vehicle has difficulty completing all monitors during normal driving. | Run drive cycle. |
| Isuzu | 1998-2005 | NPR [GVWR 10,001- – 14,000] (diesel) [Federal certified] | Vehicle is not equipped with OBD II. | OBD not required in federally certified vehicles in this GVWR range during these years. | OIS programmed to skip the OBD functional test. |
| Isuzu | 2000-2002 | Hombre (2WD) 2.2L I-4 (E85) | Monitors wont set on certain flex fuel models, VINs listed below. YGMXT02.2121 YGMXT02.2122 1GMXT02.2122 2GMXT02.2122 YGMXT02.2121 YGMXT02.2122 (VIN 8th digit: 5) | System monitors disabled for operation > E15 blends: O2 Sensor Heater, Secondary Air, Catalyst. System monitors disabled for operation > E10 blends: Evaporative leak check. Desensitized O2 Sensor monitor implemented; only reports faults during operation E15 blends. | OIS ignores all 11 readiness monitors. |
| Jaguar | 2017 | Jaguar XE, XF, & F-Pace 2.0L (diesel) [California certified] Test Group HJLXJ02.0STY | NOx Aftertreatment System monitor will not complete. | Vehicle design anomaly. Dealer issued recall H444. | Test normally. If the vehicle you are inspecting fails the OBD test for incomplete NOx aftertreatment monitor, direct the vehicle to a Jaguar dealership for a software update. |
| Jaguar | 2018 | Jaguar XE, XF, F-Pace & Rover Velar 2.0L (diesel) [California certified] Test group JJLXJ02.0STY | NOx Aftertreatment System monitor will not complete. | Vehicle design anomaly. Dealer issued recall H444. | Test normally. If the vehicle you are inspecting fails the OBD test for incomplete NOx aftertreatment monitor, direct the vehicle to a Jaguar dealership for a software update. |
| Jaguar | 2019 | Jaguar XE, XF, & F-Pace 2.0L (diesel) [California certified] Test group KJLXJ02.0STY | NOx Aftertreatment System monitor will not complete. | Vehicle design anomaly. Dealer issued recall H444. | Test normally. If the vehicle you are inspecting fails the OBD test for incomplete NOx aftertreatment monitor, direct the vehicle to a Jaguar dealership for a software update. |
| Jeep | 2005-2006 | Wrangler | O2 sensor, O2 heater, and catalyst readiness monitors may indicate not ready. | Vehicle design anomaly. TSB #25-005-13 Rev. A contains wiring modification to make vehicle ready. | OIS allows incomplete O2 heater monitor. |
| Jeep | 2010-2011 | Wrangler 3.8L | Failure to set Oxygen sensor monitor. PCM not running monitor frequently enough. | Recall L34 (m/t) through 9/10/2010. Recall L35 (a/t) through 3/26/2011, and/or OEM drive cycle not working. | Reflash PCM per TSB 18-027-10. May need to run special drive cycle to set O2 monitor. [Coast from 70 to 30mph three times then pullover and restart engine.] |
| Kia | 2009 | Borrego LX/EX 3.8L | Fail for readiness. Vehicle may not set EGR monitor. | Vehicle has difficulty completing EGR monitor. Difficult to run drive cycle. | OIS reprogrammed 12/7/2017 to allow EGR/VVT monitor to be incomplete. |
| Land Rover | 2017 | Discovery, Range Rover, Range Rover Sport 3.0L (diesel)[California certified] Test group HJLXT03.0GTR | NOx Aftertreatment System monitor will not complete. | Vehicle design anomaly. Dealer issued recall N808. | Test normally. If the vehicle you are inspecting fails the OBD test for incomplete NOx aftertreatment monitor, direct the vehicle to a Land Rover dealership for a software update. |
| Land Rover | 2018 | Velar 2.0L (diesel) [California certified] Test group JJLXJ02.0STY | NOx Aftertreatment System monitor will not complete. | Vehicle design anomaly. Dealer issued recall N808. | Test normally. If the vehicle you are inspecting fails the OBD test for incomplete NOx aftertreatment monitor, direct the vehicle to a Land Rover dealership for a software update. |
| Land Rover | 2019 | Velar 2.0L (diesel) [California certified] Test group KJLXJ02.0STY | NOx Aftertreatment System monitor will not complete. | Vehicle design anomaly. Dealer issued recall N808. | Test normally. If the vehicle you are inspecting fails the OBD test for incomplete NOx aftertreatment monitor, direct the vehicle to a Land Rover dealership for a software update. |
| Lexus | 2007 | RX400 Hybrid | Fail for oxygen sensor (air/fuel) monitor readiness. Air conditioning readiness monitor mistakenly set to supported instead of unsupported. | Air Fuel monitor issue. Perform software update to vehicle at no charge per Lexus campaign FLD with TSB #L-SB-0027-15. | If fails for incomplete oxygen sensor monitor, advise motorist recall may be required. Recall status: use https://www.toyota.com/recall. |
| Lincoln | 2011 | MKX 3.5L & 3.7L | Vehicle fails for readiness. Some vehicles do not set readiness monitors. | Some vehicles clear the OBD-II diagnostic data on every engine start and/or incorrectly report the VIN. Reprogram or update vehicle’s calibration. Perform monitor drive cycle. | Please consult Ford Emission Recall #13E04 for applicability. Owner must ensure recall is performed if required and all monitor drive cycles are completed prior to Smog Check testing. |
| Lincoln | 2020-2022 | Corsair; all engines; Gasoline and hybrid | Might not communicate with BAR-OIS. | Design issue. Software update available. | Test normally. If the vehicle you are inspecting fails the OBD test for no communication, direct the vehicle to a Ford dealership for a software update. Issue may be due to software in gateway module—see SSM 50974. Similar messaging will be displayed on the OIS during the inspection, and printed on the VIR for consumers. |
| Mazda | 2000 | MPV | Failure to set Catalyst monitor. | May need catalyst and/or oxygen sensor. Diagnose and repair. | Likely broken vehicle. Repair and retest. |
| Mazda | 2002-2003 | B3000 (2WD) 3.0L V-6 (E-85) | Readiness monitors will not set on certain flex fuel models. | Monitors disabled for operation >E10 blends: Catalyst. Desensitized evaporative leak/purge check monitor to detect gross leak for operation >E75 blends (monitor fully compliant up to E75 blends). | OIS ignores all 11 readiness monitors. |
| Mazda | 2003-2004 | Mazda 6 | Some vehicles may have a false MIL illumination during inspection with multiple U-code DTCs during OBDII test. The following OBD Codes may be set. (U1900-ABS, U2516-ABS, U1900-FF- IC, U2516-FF-IC, U0073-FF- PCM, U0073-FF-TCM, U0100-FF-TCM). | PCM sensitive to OBD tool connect or disconnect to DLC with ignition in the “On” position, or when the engine is running. See Mazda Service Bulletin #01-002/05 Dated 01/13/2005. Erase trouble codes, disconnect tool when ignition switch off. | Reset monitors. Connect/disconnect DAD to vehicle only when key off. |
| Mazda | 2005 | Mazda 6 (with 2.3 only) | Some vehicles may have a false MIL illumination during inspection with multiple U-code DTCs during OBDII test. The following OBD Codes may be set. (U1900-ABS, U2516-ABS, U1900-FF- IC, U2516-FF-IC, U0073-FF- PCM, U0073-FF-TCM, U0100-FF-TCM). | PCM sensitive to OBD tool connect or disconnect to DLC with ignition in the “On” position, or when the engine is running. See Mazda Service Bulletin #01-002/05 Dated 01/13/2005. Erase trouble codes, disconnect tool when ignition switch off. | Reset monitors. Connect/disconnect DAD to vehicle only when key off. |
| Mazda | 2003-2005 | Mazda 6 – 2.3 engine non PZEV (built May 20, 2002 – July 2, 2005) Mazda 6 – 3.0 engine (built May 16, 2002 – August 23, 2004) | Some vehicles may have a false MIL illumination during inspection. This will cause the vehicle to fail the test, although the vehicle itself has no problem. | PCM sensitive to OBD tool connect or disconnect to DLC with ignition in the “On” position, or when the engine is running. See TSB #01-024/05. If vehicle within VIN range reprogram PCM and TCM. Or Earlier Emission Recall TSB #1303F to Reprogram PCM applicable to certain VINs. | Follow OIS prompts. Connect/disconnect DAD when key off. |
| Mitsubishi Fuso | 1998-2004 | FE639/FG639 [GVWR 10,001 –14,000] (diesel) [Federal certified] | Vehicle is not equipped with OBDII. | OBD not required in federally certified vehicles in this GVWR range during these years. | OIS programmed to skip the OBD functional test. |
| Mitsubishi | 2000-2001 | Montero, Montero Sport, Diamante, 3000GT Mirage, Galant, Expo/Expo LRV, and Eclipse models (except 2.0L non—turbo 420A engine models). | Fail for monitor readiness. | Some monitors are difficult to complete. | Follow recommended drive cycles. See Mitsubishi service manual. |
| Nissan | 1999-2007 | UD1200, [GVWR 10,001-14,000] (Diesel) [Federal certified] | Vehicle is not equipped with OBDII. | OBD not required in federally certified vehicles in this GVWR range during these years. | OIS programmed 2/26/2016 to skip the OBD functional test. |
| Nissan | 2000-2001 | Maxima | Failure to set catalyst monitor. | Only OEM scan tool shows OBD catalyst code. | Test catalyst and replace if defective. |
| Nissan | 2000-2006 | All models | Fail for monitor readiness. | Incomplete monitors during normal driving. Follow drive cycle for that specific year, make, model, engine, certification, transmission. Run entire drive pattern even if only one monitor unset. | Follow drive cycle. See owner’s manual. |
| Plymouth | 1999-2000 | Voyager with 3.0L engine built after 12/1/1998 | EGR Monitor will not complete at high altitude. | Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00. | Vehicle requires reflash. Repair per TSB, run monitors then retest. |
| Plymouth | 2000 | Voyager 3.3L V-6 (E-85) | Readiness monitors will not set on certain flex fuel models, VINs listed below. WCRXT03.32BP (VIN 8th digit: G). | All monitors disabled for operation >E30 and ethanol fuel content learning. | OIS ignores all 11 readiness monitors. |
| Suzuki | 2001 | Aerio | Fail for monitor readiness. | Monitors can be difficult to complete. | Follow drive cycle. See OBD Clearinghouse or Suzuki service information. |
| Suzuki | 2004 | Forenza | Fail for monitor readiness. | Monitors can be difficult to complete. | Follow drive cycle. See OBD Clearinghouse or Suzuki service information. |
| Toyota | 2000-2006 | All models | Fail for monitor readiness. | Monitors can be difficult to complete. | Follow drive cycle. See Toyota service information. |
| Toyota | 2003-2004 | 4 Runner | Vehicle Stability Control (VSC) light may illuminate if CAN protocol attempted with aftermarket scan tool. | Vehicle loses stability control calibration when CAN protocol attempted. Follow service procedure to reset zero-point calibration. | OIS will not attempt to communicate via CAN protocol on these vehicles. |
| Toyota | 2007 | Highlander Hybrid | Fail for oxygen sensor (air/fuel) monitor readiness. | Air Fuel monitor issue. Perform software update to vehicle at no charge per Toyota Special Service Campaign F0P, dated August 20, 2015 and TSB #0042-15. | If fails for incomplete oxygen sensor monitor, advise motorist recall may be required. Recall status: use https://www.toyota.com/recall. |
| Volvo | 2000 | S40 / V40 | Failure to set Comprehensive, Oxygen sensor, and Catalyst monitors. | Defective ECM. | Send to Referee for inspection only if comprehensive, oxygen sensor, and catalyst monitors unset. If any additional failures exist, they must be repaired before the Referee inspection. |
| Volvo | 2004-2006 | S40, V50 | Air conditioning readiness monitor mistakenly set to supported instead of unsupported. | Vehicle design anomaly. | OIS ignores A/C monitor status. |
| Volvo | 2005-2007 | XC90 | Air conditioning readiness monitor mistakenly set to supported instead of unsupported. | Vehicle design anomaly. | OIS ignores A/C monitor status. |
| VW | 2000-2005 | Passat | May fail for no OBD communication. No response or Only Transmission Control Module responds to DADs requests. ABS and/or brake lamp illuminated in instrument panel cluster | Broken ground bond wire in ABS module causes diagnostic communication issues with the ABS module, ECM, and TCM. Diagnose and repair per VW TSB #45 15 01, dated September 21, 2015. | Likely Broken Vehicle Repair and Retest. |
Permanent Diagnostic Trouble Code Vehicles of Interest: PDTC Clearing Issues
This section identifies vehicles known to have difficulties clearing Permanent Diagnostic Trouble Codes (PDTCs). For these vehicles, even after the underlying issue is resolved, the PDTC may persist, leading to a Smog Check failure. In many cases, software reflashes or specific procedures are available to address these PDTC issues.
| Make | Year | Model Engine (L); Fuel Type | Issue | Cause and Possible Remedy | Instructions to Inspector |
|---|---|---|---|---|---|
| Audi | 2010 | Q7; 3.0 (TDI/diesel) | Permanent Fault Codes P0087, P0088, and P053F will not clear if present. | No remedy is available. | Test normally. BAR-OIS ignores these codes. |
| Audi | 2011-2012 | Q7; 3.0 (TDI/diesel) | Permanent Fault Codes P0087, P0088, P053F, P064A, P2635, and P0230 will not clear if present. | No remedy is available. | Test normally. BAR-OIS ignores these codes. |
| Chrysler | 2011-2015 | 200; 2.4, 3.6 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Chrysler | 2010-2014 | 300; 3.6, 5.7, 6.4 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Chrysler | 2017 | Pacifica Hybrid | Vehicle fails for PDTC C2200 or B22A9-00. | Reflash modules per TSB 08-005-21 and 08-006-21 | Reflash then retest. |
| Chrysler | 2018 | Pacifica Hybrid | Vehicle fails for PDTC C2200 or B22A9-00. | Reflash modules per TSB 08-008-21 and 08-009-21 | Reflash then retest. |
| Chrysler | 2019 | Pacifica Hybrid | Vehicle fails for PDTC C2200 or B22A9-00. | Reflash modules per TSB 08-011-21 and 08-012-21 | Reflash then retest. |
| Chrysler | 2011-2015 | Town and Country; 3.6 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2011-2014 | Avenger | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2011-2012 | Caliber; 2.0, 2.4 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2011-2015 | Challenger; 3.6, 5.7, 6.4 | Vehicle fails for Permanent Fault Code U0140. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2011-2014 | Charger; 3.6, 5.7, 6.4 | Vehicle fails for Permanent Fault Code U0140. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2011-2015 | Grand Caravan; 3.6 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2010-2011 | Dakota; 3.7, 4.7 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2013 | Dart; 2.0 | Vehicle fails for Permanent Fault Code U0140. | Reflash per Recall V50 and V51. | Reflash then retest. |
| Dodge | 2013 | Dart; 2.4 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2014-2015 | Dart; 2.0, 2.4 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2011-2014 | Durango; 3.6, 5.7 | Vehicle fails for Permanent Fault Code U0140. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2011-2015 | Journey; 2.4, 3.6 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Dodge | 2010-2011 | Nitro; 3.7, 4.0 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Ford | 2011-2014 | Mustang; 3.7 & 5.0 (gasoline) | Vehicle fails for Permanent Fault Code P0315. | Vehicle not self-clearing permanent fault code. | Refer the motorist to Ford for Customer Satisfaction Program 17N01. |
| Freightliner | 2014-2015 | Sprinter 2500 Sprinter 3500 (diesel) | Vehicle fails for Permanent Fault Codes P202A, P203A, P208A, P20B9, P20BD, P20BE or P20FA. | Vehicle not self-clearing permanent fault code. | Test normally. BAR-OIS will ignore these codes. |
| Jeep | 2014-2015 | Cherokee; 2.4, 3.2 | Vehicle fails for Permanent Fault Code U0140. | Reflash per Recall V51. | Reflash then retest. |
| Jeep | 2010 | Commander; 5.7 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Jeep | 2010-2015 | Grand Cherokee; 3.6, 5.7, 6.4 | Permanent Fault Codes will not clear | Reflash per Recall V51. | Reflash then retest. |
| Jeep | 2014-2017 | Grand Cherokee (diesel) | Vehicle fails for Permanent Fault Code P1D30. | Vehicle not self-clearing permanent fault code. | Test normally. BAR-OIS will ignore this code. |
| Jeep | 2010-2012 | Liberty; 3.7 | Permanent Fault Codes will not clear | Reflash per Recall V51. | Reflash then retest. |
| Jeep | 2011-2015 | Patriot / Compass; 2.0, 2.4 | Permanent Fault Codes will not clear | Reflash per Recall V51. | Reflash then retest. |
| Jeep | 2010-2015 | Wrangler; 3.6, 3.8 | Permanent Fault Codes will not clear | Reflash per Recall V51. | Reflash then retest. |
| Mercedes | 2010-2013 | 350 Bluetec | Vehicle fails for Permanent Fault Codes P203D, P20B6, P20BD or P20BE | Vehicle not self-clearing permanent fault code. | Test normally. BAR-OIS will ignore these codes. |
| Mercedes | 2014-2015 | Sprinter 2500 Sprinter 3500 (diesel) | Vehicle fails for Permanent Fault Codes P202A, P203A, P208A, P20B9, P20BD, P20BE or P20FA. | Vehicle not self-clearing permanent fault code. | Test normally. BAR-OIS will ignore these codes. |
| Ram | 2010-2014 | 1500; 3.6, 3.7, 4.7, 5.7 | Vehicle fails for Permanent Fault Code U0140. | Reflash per Recall V51. | Reflash then retest. |
| Ram | 2013 | 1500; 3.6, 5.7 | Permanent Fault Codes will not clear. | Reflash per Recall V50. | Reflash then retest. |
| Ram | 2014-2017 | 1500 (diesel) | Vehicle fails for Permanent Fault Code P1D30. | Vehicle not self-clearing permanent fault code. | Test normally. BAR-OIS will ignore this code. |
| Ram | 2010-2015 | 2500; 5.7, 6.4 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Ram | 2011-2015 | 3500 Cab Chassis; 5.7, 6.4 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Ram | 2013-2015 | 3500 Pickup; 5.7, 6.4 | Permanent Fault Codes will not clear. | Reflash per Recall V51. | Reflash then retest. |
| Ram | 2014 | Promaster; 3.6 | Permanent Fault Codes will not clear. | Reflash per Recall V50. | Reflash then retest. |
| Volkswagen | 2010 | Touareg; 3.0 (TDI/diesel) | Permanent Fault Codes P20B5, P0087, P0088, and P053F will not clear if present. | No remedy is available. | Test normally. BAR-OIS ignores these codes. |
| Volkswagen | 2011-2012 | Touareg; 3.0 (TDI/diesel). | Permanent Fault Codes P20B5, P0087, P0088, P053F, P064A, P2635, and P0230 will not clear if present. | No remedy is available. | Test normally. BAR-OIS ignores these codes. |
BAR-97 EIS Vehicles of Interest: Monitor Readiness Challenges in Older Vehicles
For vehicles manufactured between 1996 and 1999, the BAR-97 EIS inspection system is used. This section highlights vehicles within this model year range that have known monitor readiness issues during OBD testing. In many of these cases, the BAR-97 EIS is programmed to accommodate these design anomalies, allowing for a smoother inspection process.
| Make | Year | Model Engine (L); Fuel Type | Issue | Cause and Possible Remedy | Instructions to Inspector |
|---|---|---|---|---|---|
| BMW | 1996 | 7-Series, 8-Series 5.0L, 5.4L | Monitors difficult to complete. | EIS ignores readiness status. | |
| Chrysler | 1996 | Cirrus, Concord, LHS Sebring Convertible | All monitors reset to incomplete upon every ignition key-off. | Recall campaign #678 applies to California certified vehicles originally sold in California. TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states. | Comply with recall, then test as normal. |
| Chrysler | 1996 | Concord, LHS, New Yorker, Sebring, Town & Country 2.0L, 2.4L, 2.5L, 3.3L, 3.5L | Monitors difficult to complete. | EIS ignores readiness status. | |
| Chrysler | 1998-1999 | Town & Country 3.3L Flex Fuel | Monitors may not function when ethanol is detected by the vehicle. | Test as normal. | |
| Dodge | 1996 | Stratus, Intrepid, Neon | All monitors reset to incomplete upon every ignition key-off. | Recall campaign #678 applies to California certified vehicles originally sold in California. TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states. | Comply with recall, then test as normal. |
| Dodge | 1996 | Avenger, Stratus 2.0L manual | Monitors difficult to complete. | EIS ignores readiness status. | |
| Dodge | 1996 | Stealth 3.0L | All monitors reset to incomplete upon every ignition key-off. | These vehicles are not reflashable. | EIS ignores readiness status. |
| Dodge | 1998-1999 | Caravan 3.3L Flex Fuel | Monitors may not function when ethanol is detected by the vehicle. | Test as normal. | |
| Eagle | 1996 | Vision | All monitors reset to incomplete upon every ignition key-off. | Recall campaign #678 applies to California certified vehicles originally sold in California. TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states. | Comply with TSB, then test as normal. |
| Eagle | 1996-1997 | Talon 2.0L | Monitors difficult to complete. | EIS ignores readiness status. | |
| Ford | 2020-2022 | F-53 Motorhome, F-59 Commercial Stripped Chassis; Gasoline (not hybrid) | May fail for no OBD communication. | Design issue. Software update available. | Test normally. If the vehicle you are inspecting fails the OBD test for no communication, direct the vehicle to a Ford dealership for a software update. Issue may be due to software in gateway module—see SSM 50974. |
| Ford | 2021-2023 | F-650, F-750; all engines; Gasoline (not hybrid) | May fail for no OBD communication. | Design issue. Software update available. | Test normally. If the vehicle you are inspecting fails the OBD test for no communication, direct the vehicle to a Ford dealership for a software update. Issue may be due to software in gateway module—see SSM 50974. |
| Hyundai | 1996 | Accent 1.5L Elantra 1.8L Sonata 2.0L | Monitors difficult to complete. | EIS ignores readiness status. | |
| Hyundai | 1997-1998 | Sonata 2.0L, 3.0L | Monitors difficult to complete. | EIS ignores readiness status. | |
| lnfiniti | 1996 | All models | Catalyst and evaporative system monitors are difficult to complete. | Follow drive cycle for specific vehicle model per TSB #ITB98-011F, June 7, 2013. | Test as normal. |
| Kia | 1996 | Sephia Sportage | Monitors difficult to complete. | EIS ignores readiness status. | |
| Lexus | 1996-1999 | All models | Monitors can be difficult to complete. | Follow drive cycles in Lexus service information. | Test as normal. |
| Mercedes-Benz | 1996 | C220, E320, C280, S320, SL320 | The MIL illuminates when a scan tool is connected to the DLC. Trouble codes are not stored. | If the OBD II connector is used as the RPM source during the Smog Check, the MIL will illuminate. | Do not connect the OBD II connector until the analyzer prompts for the OBD II functional test. Use the conventional contact or non-contact method to obtain an rpm signal. |
| Mitsubishi | 1996-1997 | All Models | Monitors difficult to complete. | EIS ignores readiness status. | |
| Mitsubishi | 1998 | Eclipse (all), Galant 2.4L, Mirage, Montero Sport 2.4L | Monitors difficult to complete. | EIS ignores readiness status. | |
| Mitsubishi | 1998 | 3000GT, Diamante, Galant 2.3L, Montero, Montero Sport 3.0L | Some monitors are difficult to complete. | Follow recommended drive cycles in Mitsubishi service manual. | Test as normal. |
| Mitsubishi | 1999 | All models | Some monitors are difficult to complete. | Follow recommended drive cycles in Mitsubishi service manual. | Test as normal. |
| Nissan | 1996 | Sentra 1.6L and 2.0L manual, 200SX 1.6L, 240SX 2.4L, Maxima 3.0L, Pickup 2.4L | Monitors difficult to complete. | EIS ignores readiness status. | |
| Nissan | 1996-1997 | All models | Catalyst and evaporative system monitors are difficult to complete. | Follow recommended drive cycle for specific model per Nissan TSB #NTB98-018G, June 7, 2013. | Comply with TSB, then test as normal. |
| Nissan | 1999 | All models | Monitors can be difficult to complete. | Follow owner’s manual drive cycle to achieve readiness. | Test as normal. |
| Plymouth | 1996 | Breeze, Neon | All monitors reset to incomplete upon every ignition key-off. | Recall campaign #678 applies to California certified vehicles originally sold in California. TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states. | Comply with recall, then test as normal. |
| Plymouth | 1998-1999 | Voyager 3.3L Flex Fuel | Monitors may not function when ethanol is detected by the vehicle. | Test as normal. | |
| Saab | 1996-1998 | 900 2.3L (B234 with Motronic 4.1) | Monitors difficult to complete. | EIS ignores readiness status. | |
| Saab | 1996-1998 | All models | Catalyst and evaporative system monitors are difficult to complete. | Saab Service Instruction No. 248-9037 describes the correct drive cycle for completion of the monitors. | Comply with TSB, then test as normal. |
| Subaru | 1996 | All models | Readiness cleared at key-off. | EIS ignores readiness status. | |
| Toyota | 1996-1999 | All models | Monitors can be difficult to complete. | Follow drive cycles in Toyota service information. | Test as normal. |
| Toyota | 1996-1997 | Tercel, Paseo | Evaporative system monitor will never complete or is unsupported. | The EIS allows any one monitor to be incomplete. Test as normal. | |
| VW | 1997-1999 | Passat | May fail for no OBD communication. No response or Only Transmission Control Module responds to DADs requests. ABS and/or brake lamp illuminated in instrument panel cluster. | Broken ground bond wire in ABS module causes diagnostic communication issues with the ABS module, ECM, and TCM. Diagnose and repair per VW TSB #45 15 01, dated September 21, 2015. | Likely Broken Vehicle. Repair and retest. |
| Volvo | 1996-1998 | All models | Monitors difficult to complete. | Follow recommended drive cycles in Service Bulletin 25-19 | EIS ignores readiness status. |
