P1A55 – BMW DTC

BMW DTC P1A55 – Electric/Auxiliary Transmission Fluid Pump Motor Control Module Over Temperature

DTC P1A55 meaning on BMW

DTC P1A55 on a BMW refers to an Electric/Auxiliary Transmission Fluid Pump Motor Control Module Over Temperature fault. This fault code indicates that the control module responsible for managing the electric or auxiliary transmission fluid pump motor has detected that the module’s temperature has exceeded the specified threshold.

BMW DTC P1A55 symptoms

Symptoms associated with DTC P1A55 on a BMW may include:

• Warning light on the dashboard
• Transmission shifting issues
• Reduced performance or drivability

BMW DTC P1A55 causes

The common causes of DTC P1A55 on a BMW include:

• Overheating of the transmission fluid pump motor control module
• Electrical faults in the control module or related components
• Excessive load on the transmission fluid pump motor

BMW DTC P1A55 seriousness

The seriousness of DTC P1A55 on a BMW depends on the driving conditions and the extent of the issue. Ignoring this fault code can lead to potential transmission damage or drivability issues. It is recommended to address this fault promptly to prevent further complications.

How to diagnose DTC P1A55 on BMW

To diagnose DTC P1A55 on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes from the vehicle’s control module.
2. Inspect the transmission fluid pump motor control module for any signs of overheating or damage.
3. Check the electrical connections and wiring related to the transmission fluid pump motor for any faults.

How to fix DTC P1A55 on BMW

To fix DTC P1A55 on a BMW, consider the following:

1. Replace the transmission fluid pump motor control module if it is overheating or faulty.
2. Repair any damaged electrical connections or wiring related to the transmission fluid pump motor.
3. Ensure proper cooling and ventilation for the transmission fluid pump motor control module.

How to erase DTC P1A55 on BMW

To erase DTC P1A55 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s control module. After addressing the underlying issue causing the fault code, clearing the code will reset the system and turn off the warning light on the dashboard.

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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