BMW DTC P1AF2 – Drive Motor ‘B’ Power Supply Circuit Isolation Fault
DTC P1AF2 meaning on BMW
DTC P1AF2 on a BMW indicates a Drive Motor ‘B’ Power Supply Circuit Isolation Fault. This fault code is related to an issue with the power supply circuit for the drive motor ‘B’ in the vehicle’s hybrid or electric powertrain system.
BMW DTC P1AF2 symptoms
Symptoms of the BMW DTC P1AF2 may include:
- Reduced power or performance
- Warning lights on the dashboard
- Vehicle may go into a reduced power or limp mode
BMW DTC P1AF2 causes
Common causes of the BMW DTC P1AF2 include:
- Faulty drive motor ‘B’
- Issues with the power supply circuit
- Wiring or connection problems
BMW DTC P1AF2 seriousness
The DTC P1AF2 on a BMW is a serious issue that should be addressed promptly. Ignoring this fault code can lead to further damage to the vehicle’s powertrain system and may result in drivability issues.
How to diagnose DTC P1AF2 on BMW
To diagnose the DTC P1AF2 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scan tool to retrieve the fault code
- Inspect the drive motor ‘B’ and its power supply circuit for any visible damage or loose connections
- Perform electrical tests to check the voltage and continuity in the circuit
How to fix DTC P1AF2 on BMW
Fixing the BMW DTC P1AF2 may involve the following steps:
- Repair or replace any damaged wiring or connections in the power supply circuit
- Replace the faulty drive motor ‘B’ if necessary
- Clear the fault code and reset the vehicle’s system
How to erase DTC P1AF2 on BMW
To erase the DTC P1AF2 on a BMW, a mechanic can use a diagnostic scan tool to clear the fault code from the vehicle’s system. Once the issue has been fixed and the fault code erased, the warning lights should no longer be illuminated on the dashboard.
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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