BMW DTC P1220 – Throttle/Pedal Position Sensor/Switch ‘A’ Circuit Low (Bank 2)
DTC P1220 meaning on BMW
The Diagnostic Trouble Code (DTC) P1220 for BMW refers to an issue with the Throttle/Pedal Position Sensor/Switch ‘A’ Circuit being detected as low in Bank 2. This indicates a problem with the sensor or switch responsible for monitoring the throttle or pedal position in the second bank of the engine.
BMW DTC P1220 symptoms
Symptoms of DTC P1220 on a BMW may include:
- Reduced engine power
- Engine hesitation or stalling
- Difficulty accelerating
- Illuminated Check Engine Light
BMW DTC P1220 causes
Common causes of DTC P1220 on a BMW include:
- Faulty throttle position sensor
- Wiring or connector issues in the sensor circuit
- Electronic control module (ECM) malfunction
BMW DTC P1220 seriousness
The seriousness of DTC P1220 on a BMW lies in the potential for reduced engine performance and drivability issues. Ignoring this code can lead to further damage to engine components and may result in unsafe driving conditions.
How to diagnose DTC P1220 on BMW
To diagnose DTC P1220 on a BMW, you can:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the throttle position sensor and its wiring for any visible damage
- Test the sensor’s voltage and resistance values according to manufacturer specifications
- Check for any loose or corroded connections in the sensor circuit
How to fix DTC P1220 on BMW
To fix DTC P1220 on a BMW, you may need to:
- Replace the faulty throttle position sensor
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Reset the ECM and clear the fault codes
- Perform a throttle position sensor relearn procedure if necessary
How to erase DTC P1220 on BMW
To erase DTC P1220 on a BMW, you can:
- Use a diagnostic scanner to clear the fault codes
- Disconnect the vehicle’s battery for a few minutes to reset the ECM
- Ensure that the underlying issue causing the fault code has been addressed before clearing it
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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