BMW DTC P1AFC – High Voltage System Interlock Circuit Input Circuit Low/Output Circuit High
DTC P1AFC meaning on BMW
DTC P1AFC on a BMW refers to the High Voltage System Interlock Circuit Input Circuit Low/Output Circuit High fault code. This code indicates an issue with the high voltage system interlock circuit, where the input circuit is reading low voltage while the output circuit is reading high voltage.
BMW DTC P1AFC symptoms
Symptoms of the BMW DTC P1AFC code may include the check engine light illuminating on the dashboard, reduced engine power, poor fuel efficiency, and potential drivability issues. In some cases, the vehicle may go into a reduced power mode to prevent further damage.
BMW DTC P1AFC causes
The causes of the BMW DTC P1AFC code can vary and may include issues with the high voltage system interlock circuit wiring, faulty interlock circuit components, such as sensors or relays, or problems with the high voltage system itself.
BMW DTC P1AFC seriousness
The DTC P1AFC code should be addressed promptly as it relates to the high voltage system of the vehicle. Ignoring this code can lead to potential safety hazards and further damage to the vehicle’s electrical system.
How to diagnose DTC P1AFC on BMW
To diagnose the DTC P1AFC on a BMW, a thorough inspection of the high voltage system interlock circuit should be conducted. This may involve checking the wiring for any damage, testing the interlock circuit components for proper functionality, and using diagnostic tools to pinpoint the exact cause of the fault.
How to fix DTC P1AFC on BMW
Fixing the DTC P1AFC on a BMW may require repairing or replacing any damaged wiring in the high voltage system interlock circuit, replacing faulty interlock circuit components, or addressing issues with the high voltage system itself. It is recommended to follow manufacturer guidelines and use proper diagnostic equipment during the repair process.
How to erase DTC P1AFC on BMW
Once the underlying issue causing the DTC P1AFC on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner or tool. By erasing the code, the check engine light should turn off, indicating that the issue has been addressed.
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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