BMW DTC P1686 – Electronic Throttle Control Monitor Level 2/3 Pedal Position Sensor Diagnostic Error
DTC P1686 meaning on BMW
The DTC P1686 on a BMW indicates an Electronic Throttle Control Monitor Level 2/3 Pedal Position Sensor Diagnostic Error. This error code is related to an issue with the pedal position sensor in the electronic throttle control system.
BMW DTC P1686 symptoms
Symptoms of the BMW DTC P1686 may include:
- Reduced engine power
- Engine stalling
- Difficulty accelerating
- Check Engine Light illuminated
BMW DTC P1686 causes
Common causes of the BMW DTC P1686 include:
- Faulty pedal position sensor
- Wiring or connection issues in the throttle control system
- Electronic control module (ECM) malfunction
BMW DTC P1686 seriousness
The DTC P1686 on a BMW is a serious issue that can affect the drivability and performance of the vehicle. Ignoring this error code can lead to further damage to the engine or other components of the throttle control system.
How to diagnose DTC P1686 on BMW
To diagnose the DTC P1686 on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the error code
- Inspect the pedal position sensor for proper operation
- Check the wiring and connections in the throttle control system
- Perform a thorough inspection of the electronic control module (ECM)
How to fix DTC P1686 on BMW
To fix the DTC P1686 on a BMW, the following steps may be taken:
- Replace the faulty pedal position sensor
- Repair any damaged wiring or connections in the throttle control system
- If necessary, replace the electronic control module (ECM)
How to erase DTC P1686 on BMW
To erase the DTC P1686 on a BMW, a mechanic can use a diagnostic scanner to clear the error code from the vehicle’s ECM. Once the issue has been fixed and the error code erased, the Check Engine Light should turn off.
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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