BMW DTC P0120 – Throttle/Pedal Position Sensor/Switch ‘A’ Circuit
DTC P0120 meaning on BMW
The Diagnostic Trouble Code (DTC) P0120 for BMW refers to an issue with the Throttle/Pedal Position Sensor/Switch ‘A’ Circuit. This code indicates that there is a problem with the electrical circuit associated with the throttle or pedal position sensor in the vehicle.
BMW DTC P0120 symptoms
Symptoms of a DTC P0120 on a BMW may include:
- Engine stalling or hesitation during acceleration
- Reduced engine power
- Difficulty maintaining a consistent speed
- Illumination of the Check Engine Light
BMW DTC P0120 causes
Common causes of a DTC P0120 on a BMW include:
- Faulty throttle or pedal position sensor
- Wiring or connector issues in the sensor circuit
- Corrosion or poor connections in the sensor circuit
- Electronic control module (ECM) failure
BMW DTC P0120 seriousness
The seriousness of a DTC P0120 on a BMW should not be ignored, as it can lead to drivability issues and potential safety concerns. It is recommended to address this code promptly to prevent further damage to the vehicle and ensure safe operation.
How to diagnose DTC P0120 on BMW
To diagnose a DTC P0120 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and any related codes.
- Inspect the throttle and pedal position sensor for any visible damage or wear.
- Check the wiring and connectors in the sensor circuit for loose connections or corrosion.
- Test the sensor’s output voltage using a multimeter to ensure it is within specifications.
How to fix DTC P0120 on BMW
To fix a DTC P0120 on a BMW, you can try the following solutions:
- Replace the faulty throttle or pedal position sensor.
- Repair any damaged wiring or connectors in the sensor circuit.
- Clean any corrosion from the sensor circuit connections.
- If necessary, replace the electronic control module (ECM).
How to erase DTC P0120 on BMW
To erase a DTC P0120 on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s ECM memory. Once the code is cleared, you can drive the vehicle and monitor for any recurrence of the issue. If the problem persists, further diagnosis and repairs may be necessary.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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