BMW DTC P0A55 – Drive Motor ‘B’ Current Sensor Circuit
DTC P0A55 meaning on BMW
The DTC P0A55 fault code on a BMW indicates an issue with the Drive Motor ‘B’ Current Sensor Circuit. This code is specific to hybrid vehicles and relates to a problem with the current sensor in the drive motor ‘B’ of the vehicle’s hybrid system.
BMW DTC P0A55 symptoms
Symptoms of the DTC P0A55 on a BMW may include reduced power or acceleration, decreased fuel efficiency, and in some cases, the vehicle may go into a limp mode where it operates at reduced performance levels to prevent further damage.
BMW DTC P0A55 causes
The DTC P0A55 code on a BMW can be triggered by various factors, including a faulty current sensor in the drive motor ‘B’, damaged wiring or connectors in the sensor circuit, or issues with the hybrid system’s control module.
BMW DTC P0A55 seriousness
The DTC P0A55 fault code should be addressed promptly to prevent further damage to the hybrid system and ensure the vehicle operates efficiently. Ignoring this code can lead to more severe issues and potentially result in the vehicle becoming inoperable.
How to diagnose DTC P0A55 on BMW
To diagnose the DTC P0A55 on a BMW, a comprehensive scan tool capable of reading hybrid system fault codes is required. The technician will need to inspect the drive motor ‘B’ current sensor circuit, check for any visible damage to wiring or connectors, and perform electrical tests to determine the exact cause of the fault.
How to fix DTC P0A55 on BMW
Fixing the DTC P0A55 on a BMW typically involves replacing the faulty current sensor in the drive motor ‘B’, repairing any damaged wiring or connectors, and ensuring proper connection to the hybrid system’s control module. It is recommended to follow manufacturer guidelines and use OEM parts for a reliable repair.
How to erase DTC P0A55 on BMW
Once the underlying issue causing the DTC P0A55 on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. By erasing the code, the vehicle’s onboard computer will reset the check engine light, and the system will monitor for any recurring issues.
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.