BMW DTC P0871 – Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit Range/Performance
DTC P0871 meaning on BMW
The Diagnostic Trouble Code (DTC) P0871 for BMW refers to an issue with the Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit. This code indicates that the signal from the sensor or switch located in the transmission fluid circuit is outside the expected range or performance parameters.
BMW DTC P0871 symptoms
Symptoms of DTC P0871 on a BMW may include:
- Harsh shifting
- Transmission slipping
- Transmission overheating
- Transmission not shifting into certain gears
- Transmission going into limp mode
BMW DTC P0871 causes
Common causes of DTC P0871 on a BMW include:
- Defective transmission fluid pressure sensor/switch
- Wiring or connector issues in the sensor circuit
- Low transmission fluid level or dirty fluid
- Internal transmission problems
BMW DTC P0871 seriousness
Ignoring DTC P0871 on a BMW can lead to further transmission damage and potentially unsafe driving conditions. It is important to address this issue promptly to prevent more severe problems and ensure the vehicle’s drivability and safety.
How to diagnose DTC P0871 on BMW
To diagnose DTC P0871 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the transmission fluid level and condition
- Check the wiring and connectors in the transmission fluid pressure sensor circuit
- Test the transmission fluid pressure sensor/switch for proper operation
- Perform a road test to observe the transmission behavior
How to fix DTC P0871 on BMW
To fix DTC P0871 on a BMW, the following steps may be taken:
- Replace the transmission fluid pressure sensor/switch if faulty
- Repair any damaged wiring or connectors in the sensor circuit
- Ensure the transmission fluid level is correct and replace if dirty
- Address any internal transmission issues if necessary
How to erase DTC P0871 on BMW
To erase DTC P0871 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair or maintenance has been completed, the code can be reset to see if the issue has been resolved. It is important to ensure that the underlying problem causing the fault code has been fixed before clearing the 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
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.