BMW DTC P1E20 – Drive Motor ‘B’ Inverter Temperature Sensor ‘B’ Circuit High
DTC P1E20 meaning on BMW
The DTC P1E20 error code on a BMW indicates an issue with the Drive Motor ‘B’ Inverter Temperature Sensor ‘B’ Circuit registering a high voltage signal. This fault is related to the electric drive system of the vehicle.
BMW DTC P1E20 symptoms
Symptoms of the DTC P1E20 error code on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced power output
- Abnormal temperature readings
BMW DTC P1E20 causes
Common causes of the DTC P1E20 error code on a BMW include:
- Faulty Drive Motor ‘B’ Inverter Temperature Sensor ‘B’
- Wiring or connection issues in the sensor circuit
- Internal inverter problems
BMW DTC P1E20 seriousness
The DTC P1E20 error code should be addressed promptly as it can affect the performance and efficiency of the electric drive system in the BMW. Ignoring this issue may lead to further damage and potential safety concerns.
How to diagnose DTC P1E20 on BMW
To diagnose the DTC P1E20 error code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the Drive Motor ‘B’ Inverter Temperature Sensor ‘B’ and its wiring for any visible damage
- Check the sensor’s resistance and voltage readings
- Perform a thorough inspection of the inverter system for any other related issues
How to fix DTC P1E20 on BMW
To fix the DTC P1E20 error code on a BMW, the following steps may be taken:
- Replace the faulty Drive Motor ‘B’ Inverter Temperature Sensor ‘B’
- Repair any damaged wiring or connections in the sensor circuit
- If internal inverter issues are detected, professional repair or replacement may be necessary
How to erase DTC P1E20 on BMW
To erase the DTC P1E20 error code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s system. After addressing and fixing the underlying issue, the code can be reset to turn off the Check Engine Light.
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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