BMW DTC P1E21 – Drive Motor ‘B’ Inverter Temperature Sensor ‘B’ Circuit Range/Performance
DTC P1E21 meaning on BMW
DTC P1E21 on a BMW indicates an issue with the Drive Motor ‘B’ Inverter Temperature Sensor ‘B’ Circuit Range/Performance. This means that the signal from the temperature sensor in the drive motor inverter is outside the expected range or not performing as expected.
BMW DTC P1E21 symptoms
Symptoms of DTC P1E21 on a BMW may include:
- Check Engine Light illuminated
- Reduced power or performance
- Abnormal temperature readings
BMW DTC P1E21 causes
Common causes of DTC P1E21 on a BMW include:
- Faulty drive motor inverter temperature sensor
- Wiring or connection issues in the temperature sensor circuit
- Software or programming issues
BMW DTC P1E21 seriousness
DTC P1E21 should be addressed promptly to prevent potential damage to the drive motor inverter and ensure optimal performance of the vehicle. Ignoring this fault may lead to further complications and increased repair costs.
How to diagnose DTC P1E21 on BMW
To diagnose DTC P1E21 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the drive motor inverter temperature sensor and its wiring for any visible damage
- Perform a resistance test on the temperature sensor to check for proper functionality
- Check for any loose connections or corrosion in the sensor circuit
How to fix DTC P1E21 on BMW
To fix DTC P1E21 on a BMW, you can try the following:
- Replace the drive motor inverter temperature sensor if faulty
- Repair or replace any damaged wiring or connections in the sensor circuit
- Update the software or programming of the drive motor inverter if necessary
How to erase DTC P1E21 on BMW
To erase DTC P1E21 on a BMW, you can use a diagnostic scanner to clear the fault code after the underlying issue has been resolved. This will reset the Check Engine Light and ensure that the fault code does not reappear.
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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