BMW DTC P2128 – Throttle/Pedal Position Sensor/Switch ‘E’ Circuit High
DTC P2128 meaning on BMW
The Diagnostic Trouble Code (DTC) P2128 for BMW refers to an issue with the Throttle/Pedal Position Sensor/Switch ‘E’ Circuit registering a high voltage signal. This code is specifically related to the electronic throttle control system.
BMW DTC P2128 symptoms
Symptoms of DTC P2128 on a BMW may include:
- Reduced engine power
- Acceleration hesitation
- Check Engine Light (CEL) illuminated on the dashboard
- Difficulty maintaining a steady speed
BMW DTC P2128 causes
Common causes of DTC P2128 on a BMW include:
- Faulty throttle position sensor
- Issues with the throttle pedal position sensor
- Wiring or connector problems in the throttle control circuit
- Electronic control module (ECM) issues
BMW DTC P2128 seriousness
DTC P2128 should be addressed promptly as it can lead to drivability issues and potentially unsafe driving conditions. Ignoring this code may result in further damage to the vehicle’s engine or drivetrain components.
How to diagnose DTC P2128 on BMW
To diagnose DTC P2128 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM.
- Inspect the throttle position sensor and pedal position sensor for any visible damage or wear.
- Check the wiring and connectors in the throttle control circuit for loose connections or corrosion.
- Perform a voltage test on the sensors to ensure they are functioning within the specified range.
How to fix DTC P2128 on BMW
To fix DTC P2128 on a BMW, you can try the following solutions:
- Replace the faulty throttle position sensor or pedal position sensor.
- Repair any damaged wiring or connectors in the throttle control circuit.
- Clean the throttle body and perform a throttle relearn procedure.
- If necessary, reprogram or replace the ECM.
How to erase DTC P2128 on BMW
To erase DTC P2128 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. After addressing the underlying issue causing the code, clearing the codes will reset the Check Engine Light and allow the vehicle to undergo a new diagnostic cycle.
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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