BMW DTC P01AF – Alternative Fuel Tank ‘A’ Level Sensor Circuit
DTC P01AF meaning on BMW
The DTC P01AF code on a BMW indicates a problem with the Alternative Fuel Tank ‘A’ Level Sensor Circuit. This code is triggered when the engine control module (ECM) detects a malfunction in the circuit responsible for monitoring the fuel level in the alternative fuel tank.
BMW DTC P01AF symptoms
Symptoms of the DTC P01AF code on a BMW may include inaccurate fuel level readings on the dashboard, fluctuating fuel gauge readings, or the fuel gauge showing empty even when the tank is full. In some cases, the check engine light may also illuminate.
BMW DTC P01AF causes
The common causes of the DTC P01AF code on a BMW include a faulty level sensor in the alternative fuel tank, wiring issues in the sensor circuit, or a malfunctioning ECM. Corrosion or damage to the sensor wiring can also lead to this fault code.
BMW DTC P01AF seriousness
While the DTC P01AF code may not directly affect the drivability of the vehicle, it is important to address this issue promptly to ensure accurate monitoring of the fuel level. Ignoring this code can lead to inconvenience and potential fuel-related problems.
How to diagnose DTC P01AF on BMW
To diagnose the DTC P01AF code on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the ECM. They would then inspect the wiring and connectors related to the alternative fuel tank level sensor for any signs of damage or corrosion. Testing the sensor itself for proper operation may also be necessary.
How to fix DTC P01AF on BMW
Fixing the DTC P01AF code on a BMW often involves replacing the faulty level sensor in the alternative fuel tank. Additionally, repairing any damaged wiring or connectors in the sensor circuit can help resolve this issue. Once the repairs are completed, clearing the fault codes and performing a test drive to ensure the problem is resolved is recommended.
How to erase DTC P01AF on BMW
To erase the DTC P01AF code on a BMW, a diagnostic scanner capable of clearing fault codes is typically used. After the necessary repairs have been made to address the underlying issue, the mechanic can use the scanner to reset the ECM and clear the fault code. This should turn off the check engine light and ensure that the 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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.