BMW DTC P0A71 – Generator Phase U Current High
DTC P0A71 meaning on BMW
The Diagnostic Trouble Code (DTC) P0A71 for BMW indicates that there is a high current detected in Generator Phase U. This fault code is specific to the generator or alternator in the vehicle.
BMW DTC P0A71 symptoms
Symptoms of DTC P0A71 on a BMW may include:
- Malfunction indicator light (MIL) or check engine light illuminated on the dashboard
- Battery warning light on the instrument cluster
- Reduced electrical power in the vehicle
- Issues with starting the vehicle
BMW DTC P0A71 causes
Common causes of DTC P0A71 on a BMW include:
- Faulty generator or alternator
- Issues with the generator phase U circuit
- Faulty wiring or connections related to the generator
- Faulty voltage regulator
BMW DTC P0A71 seriousness
The seriousness of DTC P0A71 on a BMW should not be ignored, as it can lead to electrical system malfunctions and potential stalling of the vehicle. It is recommended to address this issue promptly to avoid further damage to the vehicle’s electrical components.
How to diagnose DTC P0A71 on BMW
To diagnose DTC P0A71 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
- Inspect the generator or alternator for any visible signs of damage or wear
- Check the wiring and connections related to the generator phase U circuit
- Test the voltage regulator for proper functioning
How to fix DTC P0A71 on BMW
To fix DTC P0A71 on a BMW, the following steps may be taken:
- Replace the faulty generator or alternator
- Repair or replace any damaged wiring or connections related to the generator phase U circuit
- Replace the faulty voltage regulator, if necessary
- Clear the fault codes from the vehicle’s computer after the repairs have been completed
How to erase DTC P0A71 on BMW
To erase DTC P0A71 on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. Once the repairs have been made to address the underlying issue causing the fault code, the mechanic can then reset the system to remove the DTC P0A71 from the vehicle’s memory.
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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