Encountering an OBD2 error code can be a frustrating experience for any Ford Ranger owner. Among the various codes that might pop up, B1336 is one that can cause confusion. While it might not be as common as engine-related codes, understanding what B1336 signifies and how to address it is crucial for maintaining your vehicle’s health and performance. This article delves into the B1336 Obd2 Error On Ford Rangers, exploring its meaning, potential causes, and how it might relate to modifications like catalytic converter removal.
Understanding the B1336 OBD2 Error Code
The OBD2 (On-Board Diagnostics II) system is designed to monitor various aspects of your vehicle’s operation, from engine performance to emissions control. When a fault is detected, the system triggers a trouble code, which can be accessed using a diagnostic scanner. The B1336 code specifically refers to a “Battery Voltage Circuit Failure.” This indicates that the Powertrain Control Module (PCM) or another module has detected an issue with the battery voltage circuit.
In simpler terms, your Ford Ranger’s computer is not receiving the correct voltage reading, or there’s a problem within the voltage monitoring circuit itself. This can stem from a variety of issues, ranging from simple fixes to more complex electrical problems.
Potential Causes of B1336 on a Ford Ranger
Several factors can contribute to a B1336 error code. It’s important to systematically investigate these potential causes to pinpoint the root of the problem:
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Low Battery Voltage: The most straightforward cause is a weak or failing battery. If your battery is old, not properly charged, or has internal faults, it may not provide consistent and adequate voltage, triggering the B1336 code.
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Faulty Battery Connections: Corroded, loose, or damaged battery terminals and cables can impede proper voltage flow. These issues can create resistance in the circuit, leading to voltage drops and triggering the error.
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Wiring Issues: Damage to the wiring harness related to the battery voltage sensor or circuit can cause malfunctions. This could include frayed wires, shorts, or open circuits.
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Sensor Malfunction: The voltage sensor itself, responsible for monitoring battery voltage and sending readings to the PCM, could be faulty. If the sensor is providing inaccurate data, it can lead to a B1336 code.
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PCM or Module Issues: In less frequent cases, the problem might lie within the PCM or another module that monitors battery voltage. While less common, internal module failures can lead to misinterpretations of voltage readings.
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Aftermarket Accessories or Modifications: Improperly installed aftermarket accessories, particularly those drawing power directly from the battery, can sometimes create electrical disturbances or voltage drops, potentially contributing to a B1336 error. This is where modifications to the exhaust system, such as catalytic converter removal, might indirectly play a role – not by directly causing B1336, but by potentially leading to other electrical modifications or sensor issues.
Catalytic Converter Removal and OBD2 Errors: Is There a Connection?
Now, let’s address the topic of catalytic converter removal in the context of OBD2 errors and specifically the B1336 code. Removing catalytic converters is a modification that some vehicle owners consider, often with the aim of increasing engine performance or altering exhaust sound. However, it’s crucial to understand the implications, both legally and technically.
Direct Link to B1336 is Unlikely: It’s important to state that removing catalytic converters is highly unlikely to directly cause a B1336 “Battery Voltage Circuit Failure” error. The catalytic converter is primarily part of the exhaust system and emissions control. It doesn’t directly interact with the battery voltage circuit.
Indirect Potential and Related Issues: While not a direct cause, modifications like catalytic converter removal can sometimes be associated with OBD2 errors and might indirectly surface issues that could be misconstrued or occur around the same time as a B1336. Here’s how:
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Oxygen Sensor Issues: Catalytic converters work in conjunction with oxygen sensors. Removing the catalytic converter often necessitates modifications to the oxygen sensor setup, sometimes involving simulators or tuning adjustments to prevent “catalytic converter efficiency” codes (like P0420). If these modifications are not done correctly, or if they introduce electrical problems, it’s theoretically possible that they could interfere with other electrical systems, although a B1336 code would still be an unusual and indirect consequence. It’s more likely that improper sensor modifications would trigger codes directly related to the oxygen sensors or fuel system.
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Electrical Modifications and Tuning: When making modifications like catalytic converter removal, especially for performance purposes, engine tuning is often required. Improper tuning or electrical work during this process could introduce electrical glitches or issues that, in very rare and indirect scenarios, could theoretically contribute to electrical system anomalies. However, again, B1336 would be a less direct and less probable outcome compared to other sensor or performance related codes.
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Coincidental Issues: It’s also possible that a B1336 error and the decision to remove catalytic converters are simply coincidental in timing. A failing battery or corroded terminals can occur independently of any exhaust modifications. If a B1336 error appears around the same time as exhaust work, it doesn’t automatically mean the two are causally linked.
Important Note on Legality and Emissions: Removing catalytic converters is illegal in many jurisdictions for on-road vehicles due to emissions regulations. It’s also detrimental to the environment. Furthermore, while some claim performance gains, modern vehicles are often designed to work optimally with catalytic converters, and removal can sometimes lead to negligible or even negative performance impacts without extensive and professional tuning.
Diagnosing and Addressing the B1336 Error
If you are facing a B1336 OBD2 error on your Ford Ranger, follow these steps for diagnosis and resolution:
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Check Battery Voltage: Use a multimeter to check the battery voltage. A healthy battery should read around 12.6 volts when the engine is off and around 13.7 to 14.7 volts when the engine is running. Low voltage indicates a battery issue.
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Inspect Battery Connections: Thoroughly inspect battery terminals and cables for corrosion, looseness, or damage. Clean corroded terminals with a wire brush and ensure connections are tight. Replace damaged cables as needed.
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Visual Wiring Inspection: Carefully examine the wiring harness related to the battery and voltage sensor for any signs of damage, fraying, or exposed wires. Repair or replace damaged wiring sections.
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Scan for Other Codes: Use an OBD2 scanner to check for any other related trouble codes. Sometimes, B1336 might be accompanied by other codes that provide further clues about the underlying issue.
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Professional Diagnosis: If the above steps don’t resolve the issue, it’s recommended to seek professional diagnosis from a qualified mechanic. They have specialized tools and expertise to further diagnose electrical system issues, sensor malfunctions, or potential PCM/module problems.
Regarding Catalytic Converter Modifications: If you have modified your exhaust system, including catalytic converter removal, and are experiencing OBD2 errors, it’s crucial to ensure that any sensor modifications or tuning adjustments were done correctly. Consult with a reputable tuner or exhaust specialist to verify the setup and rule out any issues related to these modifications. However, remember that B1336 is unlikely to be directly related to the exhaust modification itself, and the focus should primarily be on the battery voltage circuit.
Conclusion
The B1336 OBD2 error on a Ford Ranger signals a problem within the battery voltage circuit. While modifications like catalytic converter removal are not a direct cause of this specific code, it’s important to consider the broader context of vehicle modifications and electrical systems. Addressing a B1336 error involves systematic diagnosis, starting with basic checks of battery voltage and connections, and potentially progressing to professional electrical system troubleshooting. Prioritizing proper diagnosis and repair will ensure your Ford Ranger remains reliable and performs as intended, while also adhering to legal and environmental regulations regarding emissions systems.
