BMW DTC P0AF4 – Drive Motor Inverter Temperature Sensor ‘B’ Circuit Low
DTC P0AF4 meaning on BMW
The Diagnostic Trouble Code (DTC) P0AF4 for BMW refers to the Drive Motor Inverter Temperature Sensor ‘B’ Circuit Low. This code indicates that the signal from the temperature sensor ‘B’ in the drive motor inverter is reading lower than the expected range.
BMW DTC P0AF4 symptoms
Symptoms associated with the BMW DTC P0AF4 may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Reduced power or performance
- Increased fuel consumption
- Vehicle may go into a reduced power or limp mode
BMW DTC P0AF4 causes
Common causes of the BMW DTC P0AF4 include:
- Faulty drive motor inverter temperature sensor ‘B’
- Wiring or connection issues in the temperature sensor circuit
- Internal faults in the drive motor inverter
BMW DTC P0AF4 seriousness
The DTC P0AF4 for BMW should not be ignored as it can lead to drivability issues and potentially cause further damage to the drive motor inverter system. It is recommended to address this issue promptly to prevent any long-term problems.
How to diagnose DTC P0AF4 on BMW
To diagnose the DTC P0AF4 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the drive motor inverter temperature sensor ‘B’ and its wiring for any visible damage or corrosion
- Perform a resistance test on the temperature sensor to check for proper operation
- Check the connections and wiring in the circuit for any loose connections or shorts
How to fix DTC P0AF4 on BMW
To fix the DTC P0AF4 on a BMW, you can consider the following actions:
- Replace the drive motor inverter temperature sensor ‘B’ if it is found to be faulty
- Repair or replace any damaged wiring or connections in the temperature sensor circuit
- If internal faults are detected in the drive motor inverter, it may need to be repaired or replaced
How to erase DTC P0AF4 on BMW
To erase the DTC P0AF4 on a BMW, you can use a diagnostic scanner to clear the fault code after the underlying issue has been addressed and fixed. Once the repair has been completed, you can reset the fault code to turn off the Check Engine Light and ensure that the system is functioning properly.
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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