BMW DTC P1A94 – Drive Motor ‘A’ Control Module Low Voltage Power Supply Circuit High
DTC P1A94 meaning on BMW
DTC P1A94 on a BMW refers to the Drive Motor ‘A’ Control Module Low Voltage Power Supply Circuit High. This diagnostic trouble code indicates that there is a high voltage condition detected in the power supply circuit for the drive motor control module ‘A’.
BMW DTC P1A94 symptoms
Symptoms of BMW DTC P1A94 may include:
- Check Engine Light (MIL) illuminated
- Reduced power or performance
- Vehicle may go into a reduced power or limp mode
- Increased fuel consumption
BMW DTC P1A94 causes
Common causes of BMW DTC P1A94 include:
- Faulty drive motor control module ‘A’
- Issues with the power supply circuit such as wiring faults or poor connections
- Faulty high voltage battery
- Software issues in the control module
BMW DTC P1A94 seriousness
The seriousness of BMW DTC P1A94 lies in the potential for reduced performance and drivability of the vehicle. Ignoring this fault can lead to further damage to the drive motor control system and may result in unsafe driving conditions.
How to diagnose DTC P1A94 on BMW
To diagnose BMW DTC P1A94, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the power supply circuit for any visible damage or loose connections
- Test the voltage output of the high voltage battery
- Check the drive motor control module ‘A’ for any signs of malfunction
- Perform a software update or reprogramming if necessary
How to fix DTC P1A94 on BMW
To fix BMW DTC P1A94, the following steps may be taken:
- Repair or replace any damaged wiring or connections in the power supply circuit
- Replace the drive motor control module ‘A’ if found to be faulty
- Test and replace the high voltage battery if needed
- Perform software updates or reprogramming as recommended by the manufacturer
How to erase DTC P1A94 on BMW
To erase BMW DTC P1A94, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made, the code can be reset, and the Check Engine Light should turn off. It is important to ensure that the underlying issue causing the fault code has been addressed 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
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