B1279 – OBD-II DTC

OBD-II DTC B1279 – Servo Motor Potentiometer Foot Circuit Short To Ground

DTC B1279 meaning

DTC B1279 refers to a diagnostic trouble code indicating a problem with the servo motor potentiometer foot circuit. This code specifically points to a short to ground condition within the circuit that connects the potentiometer to the vehicle’s control module. The potentiometer is responsible for measuring the position of the accelerator pedal, which is crucial for proper engine management and performance.

DTC B1279 symptoms

Common symptoms associated with DTC B1279 may include:

• Illumination of the check engine light
• Unresponsive or erratic throttle response
• Reduced engine power or limp mode activation
• Increased fuel consumption
• Difficulty in accelerating

DTC B1279 causes

Several factors can lead to the occurrence of DTC B1279, including:

• Faulty servo motor potentiometer
• Wiring issues, such as frayed or damaged wires
• Corrosion or poor connections in the electrical circuit
• Short circuits in the potentiometer circuit
• Faulty engine control module (ECM)

DTC B1279 seriousness

DTC B1279 is considered a serious issue as it can affect the vehicle’s throttle response and overall performance. If left unaddressed, it may lead to unsafe driving conditions, including reduced acceleration and potential stalling. It is advisable to diagnose and repair this code promptly to ensure safe vehicle operation.

How to diagnose DTC B1279

To diagnose DTC B1279, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the wiring and connectors related to the servo motor potentiometer for any visible damage or corrosion.
3. Check the resistance of the potentiometer using a multimeter to ensure it is within specifications.
4. Test for continuity in the circuit to identify any shorts to ground.
5. Examine the engine control module for any faults or updates that may be necessary.

How to fix DTC B1279 step-by-step instructions

To fix DTC B1279, follow these step-by-step instructions:

1. Disconnect the battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors associated with the potentiometer.
3. If the potentiometer is faulty, replace it with a new one.
4. Reconnect all electrical connections securely.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test drive the vehicle to ensure the issue is resolved and the DTC does not reappear.

How to erase DTC B1279

To erase DTC B1279, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the check engine light is off.

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