BMW DTC P25C2 – Alternative Fuel Disable Signal Circuit High
DTC P25C2 meaning on BMW
The DTC P25C2 code on a BMW indicates an issue with the Alternative Fuel Disable Signal Circuit being detected as high. This means that the signal voltage in the circuit is higher than the specified threshold, causing the system to disable the alternative fuel function.
BMW DTC P25C2 symptoms
Symptoms of the DTC P25C2 code on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Vehicle may not switch to alternative fuel mode
BMW DTC P25C2 causes
Common causes of the DTC P25C2 code on a BMW include:
- Faulty wiring or connections in the Alternative Fuel Disable Signal Circuit
- Defective alternative fuel system components
- Issues with the engine control module (ECM)
BMW DTC P25C2 seriousness
The seriousness of the DTC P25C2 code on a BMW depends on the underlying cause. While the vehicle may still be operable with this code present, it is important to address the issue promptly to prevent potential long-term damage to the engine or emissions system.
How to diagnose DTC P25C2 on BMW
To diagnose the DTC P25C2 code on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM
- Inspect the wiring and connections in the Alternative Fuel Disable Signal Circuit for any damage or corrosion
- Test the components of the alternative fuel system for proper operation
- Check the ECM for any faults or programming issues
How to fix DTC P25C2 on BMW
To fix the DTC P25C2 code on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connections in the Alternative Fuel Disable Signal Circuit
- Replace any faulty components in the alternative fuel system
- If the issue lies with the ECM, reprogram or replace it as necessary
How to erase DTC P25C2 on BMW
To erase the DTC P25C2 code on a BMW, the fault codes can be cleared using a diagnostic scanner. After the repairs have been made to address the underlying issue, the code can be reset to see if the problem has been resolved successfully.
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.