BMW DTC P1A29 – Drive Motor ‘A’ Control Module 5V Sensor Power Supply Circuit ‘B’ High
DTC P1A29 meaning on BMW
The DTC P1A29 fault code on BMW vehicles indicates an issue with the Drive Motor ‘A’ Control Module 5V Sensor Power Supply Circuit ‘B’ being too high. This means that there is a problem with the power supply to the sensor in the drive motor control module, which can lead to various drivability issues.
BMW DTC P1A29 symptoms
Symptoms of the BMW DTC P1A29 code may include:
- Check Engine Light illuminated
- Reduced engine performance
- Vehicle may go into limp mode
- Unusual noises or vibrations from the drivetrain
BMW DTC P1A29 causes
Common causes of the BMW DTC P1A29 fault code include:
- Faulty drive motor control module
- Short circuit or open circuit in the sensor power supply circuit
- Issues with the sensor itself
- Electrical wiring or connector problems
BMW DTC P1A29 seriousness
The BMW DTC P1A29 fault code should be addressed promptly as it can lead to drivability issues and potentially cause further damage to the vehicle if left unresolved. Ignoring this fault code may result in poor engine performance and increased risk of component failure.
How to diagnose DTC P1A29 on BMW
To diagnose the DTC P1A29 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 computer
- Inspect the drive motor control module and sensor power supply circuit for any visible damage or corrosion
- Test the sensor power supply circuit for proper voltage and continuity
- Check the sensor itself for proper operation
- Inspect the electrical wiring and connectors for any signs of damage or loose connections
How to fix DTC P1A29 on BMW
To fix the DTC P1A29 fault code on a BMW, the following steps may be taken:
- Replace the faulty drive motor control module if necessary
- Repair any short circuits or open circuits in the sensor power supply circuit
- Replace the sensor if it is found to be faulty
- Repair or replace any damaged electrical wiring or connectors
- Clear the fault codes from the vehicle’s computer after completing the repairs
How to erase DTC P1A29 on BMW
To erase the DTC P1A29 fault code on a BMW, a diagnostic scanner can be used to clear the code from the vehicle’s computer. After completing the necessary repairs to address the underlying issue causing the fault code, the code can be cleared to reset the Check Engine Light and ensure that the repair was successful.
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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