BMW DTC P1A71 – Electric/Auxiliary Transmission Fluid Pump Current Sensor Circuit High
DTC P1A71 meaning on BMW
The DTC P1A71 fault code on BMW vehicles indicates an issue with the Electric/Auxiliary Transmission Fluid Pump Current Sensor Circuit registering a high voltage or current reading. This sensor is responsible for monitoring the operation of the transmission fluid pump, which plays a crucial role in maintaining proper fluid pressure and lubrication within the transmission system.
BMW DTC P1A71 symptoms
Symptoms associated with the BMW DTC P1A71 code may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Transmission shifting issues
- Reduced vehicle performance
- Transmission overheating
BMW DTC P1A71 causes
Common causes of the BMW DTC P1A71 fault code include:
- Faulty Electric/Auxiliary Transmission Fluid Pump Current Sensor
- Wiring or connection issues in the sensor circuit
- Internal transmission pump problems
BMW DTC P1A71 seriousness
Ignoring the DTC P1A71 fault code on a BMW can lead to potential transmission damage and drivability issues. It is important to address this problem promptly to prevent further complications and ensure the proper functioning of the transmission system.
How to diagnose DTC P1A71 on BMW
When diagnosing the DTC P1A71 code on a BMW, the following steps can be taken:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the Electric/Auxiliary Transmission Fluid Pump Current Sensor and its wiring for any visible damage
- Perform a circuit test to check for continuity and proper voltage readings
- Check the transmission fluid level and condition
How to fix DTC P1A71 on BMW
To resolve the BMW DTC P1A71 fault code, you can consider the following actions:
- Replace the Electric/Auxiliary Transmission Fluid Pump Current Sensor if found faulty
- Repair any damaged wiring or connections in the sensor circuit
- Inspect and service the transmission pump if necessary
- Clear the fault codes and perform a test drive to verify the repair
How to erase DTC P1A71 on BMW
To erase the DTC P1A71 fault code on a BMW, you can use a diagnostic scanner to clear the code from the vehicle’s memory. After addressing the underlying issue causing the fault code, clearing the code will reset the Check Engine Light and allow for a fresh monitoring cycle of the system.
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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