BMW DTC P1228 – Throttle/Pedal Position Sensor/Switch ‘B’ Circuit Low (Bank 2)
DTC P1228 meaning on BMW
The Diagnostic Trouble Code (DTC) P1228 for BMW refers to an issue with the Throttle/Pedal Position Sensor/Switch ‘B’ Circuit on Bank 2. This code indicates that the signal from the throttle or pedal position sensor on Bank 2 is reading lower than the expected range.
BMW DTC P1228 symptoms
Symptoms of DTC P1228 on a BMW may include:
- Reduced engine power
- Engine hesitation or stalling
- Difficulty accelerating
- Illuminated Check Engine Light
BMW DTC P1228 causes
Common causes of DTC P1228 on a BMW include:
- Faulty throttle or pedal position sensor
- Wiring or connector issues in the sensor circuit
- Electronic control module (ECM) malfunction
BMW DTC P1228 seriousness
DTC P1228 should be addressed promptly as it can lead to drivability issues and potential safety concerns. Ignoring this code may result in further damage to engine components or drivetrain systems.
How to diagnose DTC P1228 on BMW
To diagnose DTC P1228 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the throttle and pedal position sensors for any visible damage or wear
- Check the wiring and connectors for any signs of corrosion or disconnection
- Perform a voltage test on the sensor circuit to verify proper signal output
How to fix DTC P1228 on BMW
To fix DTC P1228 on a BMW, you can try the following solutions:
- Replace the faulty throttle or pedal position sensor
- Repair or replace any damaged wiring or connectors in the sensor circuit
- If necessary, reprogram or replace the ECM
How to erase DTC P1228 on BMW
To erase DTC P1228 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM memory. After addressing the underlying issue causing the code, clearing the code will reset the Check Engine Light and monitor the system for any recurring faults.
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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