BMW DTC P0C20 – Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open
DTC P0C20 meaning on BMW
The DTC P0C20 fault code on BMW vehicles indicates an issue with the Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit being open. This means that there is a disruption in the electrical circuit that controls the transmission fluid pump, which can lead to improper fluid circulation and potential transmission performance problems.
BMW DTC P0C20 symptoms
Symptoms of the BMW DTC P0C20 fault code may include:
- Transmission shifting issues
- Reduced acceleration or power loss
- Transmission overheating
- Warning lights on the dashboard, such as the transmission warning light
BMW DTC P0C20 causes
Common causes of the BMW DTC P0C20 fault code include:
- Faulty electric transmission fluid pump
- Wiring or connector issues in the U-V-W circuit
- Low transmission fluid level
- Internal transmission problems
BMW DTC P0C20 seriousness
The BMW DTC P0C20 fault code should be addressed promptly to prevent potential damage to the transmission system. Ignoring this fault code can lead to further transmission issues and potentially costly repairs.
How to diagnose DTC P0C20 on BMW
To diagnose the DTC P0C20 fault code on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the electric transmission fluid pump for proper operation
- Check the wiring and connectors in the U-V-W circuit for any damage or loose connections
- Verify the transmission fluid level and condition
- Perform a test drive to observe the symptoms and confirm the fault
How to fix DTC P0C20 on BMW
To fix the DTC P0C20 fault code on a BMW, the following steps may be taken:
- Replace the electric transmission fluid pump if it is found to be faulty
- Repair or replace any damaged wiring or connectors in the U-V-W circuit
- Top up the transmission fluid to the correct level and address any leaks
- Address any internal transmission issues if necessary
How to erase DTC P0C20 on BMW
After the necessary repairs have been made to address the DTC P0C20 fault code on a BMW, the fault code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s memory and reset the transmission system. It is important to ensure that the repairs have been successful before clearing the fault code.
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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