Understanding the fault codes in your Chrysler vehicle is crucial for effective maintenance and repair. The Check Engine Light (MIL – Malfunction Indicator Lamp), often the first sign of trouble, signals that your vehicle’s onboard diagnostic system has detected an issue. For older Chrysler models, specifically those using OBD1 systems, retrieving these codes requires a unique approach compared to newer OBD2 systems. This guide will walk you through understanding and accessing these codes.
Chrysler vehicles equipped with OBD1 systems, unlike the standardized OBD2 systems in modern cars, require a specific ignition key cycling method to display fault codes. This method utilizes the Malfunction Indicator Lamp (MIL) to blink out codes in a sequence of long and short flashes, representing tens and units respectively.
To access the diagnostic mode and retrieve these OBD1 codes on your Chrysler, follow these steps:
- Ensure your vehicle is safely parked and the engine is off.
- Turn the ignition key to the “ON” position, without starting the engine.
- Cycle the ignition switch from “ON” to “OFF” three times, starting and ending in the “ON” position. This entire cycle must be completed within 5 seconds.
After performing this sequence correctly, the Check Engine Light will begin to flash, indicating the stored fault codes. Observe the flashes carefully. Long flashes represent the tens digit, and short flashes represent the units digit of the fault code. For example, two long flashes followed by one short flash indicates code 21. The codes will be displayed sequentially, and code 55 indicates the end of the diagnostic message.
Here is a table of common Chrysler OBD1 fault codes and their descriptions to help you understand what the codes mean:
| Code | Description |
|---|---|
| 11 | No Crank Reference Signal at PCM |
| 12 | Battery Disconnected within Last 50 Key-on Cycles |
| 13 | MAP Sensor Pneumatic Problem |
| 14 | MAP Sensor Voltage Too High or Too Low |
| 15 | No Vehicle Speed Sensor Signal |
| 16 | Battery Voltage Too Low/ Knock Sensor Circuit Problem |
| 17 | Engine Not Warmed Up Enough, Thermostat Problem |
| 21 | Oxygen Sensor Signal Indicates Lean Condition |
| 22 | Coolant Temperature Sensor Voltage Too High or Too Low |
| 23 | Intake Air Temperature Sensor Voltage Too High or Too Low |
| 24 | Throttle Position Sensor Voltage Too High or Too Low |
| 25 | Idle Air Control Valve Problem |
| 26 | Injector Circuit Peak Current Not Achieved |
| 27 | Injector Circuit Output Stage Does Not Respond Properly |
| 31 | Purge Solenoid Circuit Problem |
| 32 | EGR Valve Solenoid Circuit Problem |
| 33 | A/C Relay Circuit Problem |
| 34 | Vacuum Solenoid Circuit Problem |
| 35 | Radiator Fan Relay Circuit Problem |
| 36 | Turbo Wastegate Solenoid Circuit Problem |
| 37 | Torque Converter Clutch Solenoid Circuit Problem |
| 41 | Alternator Field Control Circuit Problem |
| 42 | ASD Relay Control Circuit Problem |
| 43 | Ignition Coil Driver Circuit Peak Current Not Achieved |
| 44 | Battery Temperature Sensor Voltage Too High or Too Low |
| 46 | Battery Voltage Too High |
| 47 | Battery Voltage Too Low |
| 51 | Lean Air/Fuel Ratio Indicated by Oxygen Sensor |
| 52 | Rich Air/Fuel Ratio Indicated by Oxygen Sensor |
| 53 | Internal Controller Failure (Check Engine Lamp On) |
| 54 | No Cam Signal at PCM |
| 55 | End of Diagnostic Trouble Codes |
| 61 | Barometric Pressure Sensor Solenoid Circuit Problem |
Understanding OBD2 and its Relevance
While this article focuses on retrieving OBD1 codes, it’s important to note that most modern vehicles, including newer Chrysler models, utilize OBD2 (On-Board Diagnostics II) systems. OBD2 is a standardized system that provides more detailed diagnostic information and uses a standard diagnostic connector. Accessing OBD2 codes requires a scan tool that plugs into this connector, making the process significantly different from the OBD1 key cycling method.
Although the keyword “Codigos De Falla Chrysler Obd2” might lead you to believe you need OBD2 information, understanding the OBD1 system is essential for owners of older Chrysler vehicles. Knowing how to retrieve and interpret these codes can save you time and money in diagnosing potential issues.
Conclusion
Decoding fault codes, whether OBD1 or OBD2, is the first step in diagnosing and repairing your Chrysler vehicle. For older models, the key cycling method provides a way to access valuable diagnostic information without specialized tools. By understanding these Chrysler OBD fault codes, you can better understand your vehicle’s needs and ensure its longevity. Remember, this guide provides general information, and consulting a qualified mechanic is always recommended for accurate diagnosis and repair, especially when dealing with complex fault codes or persistent issues.
