P0B0B – BMW DTC

BMW DTC P0B0B – Electric/Auxiliary Transmission Fluid Pump ‘A’ Motor Supply Voltage Circuit High

DTC P0B0B meaning on BMW

DTC P0B0B for BMW refers to the Electric/Auxiliary Transmission Fluid Pump ‘A’ Motor Supply Voltage Circuit High. This diagnostic trouble code indicates that there is a high voltage condition detected in the motor supply circuit of the electric or auxiliary transmission fluid pump ‘A’.

BMW DTC P0B0B symptoms

Symptoms of DTC P0B0B on a BMW may include:

• Check Engine Light illuminated on the dashboard
• Transmission shifting issues
• Reduced fuel efficiency
• Vehicle may go into limp mode

BMW DTC P0B0B causes

Common causes of DTC P0B0B on a BMW include:

• Faulty electric or auxiliary transmission fluid pump ‘A’
• Wiring or connector issues in the motor supply circuit
• High voltage from the power source

BMW DTC P0B0B seriousness

DTC P0B0B should not be ignored as it can lead to transmission problems and potentially affect the drivability of the vehicle. It is recommended to address this issue promptly to prevent further damage.

How to diagnose DTC P0B0B on BMW

To diagnose DTC P0B0B on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
2. Inspect the wiring and connectors related to the electric or auxiliary transmission fluid pump ‘A’ motor supply circuit for any visible damage or corrosion.
3. Test the voltage in the motor supply circuit to determine if it is within the specified range.
4. If necessary, perform a functional test of the electric or auxiliary transmission fluid pump ‘A’ to check its operation.

How to fix DTC P0B0B on BMW

To fix DTC P0B0B on a BMW, you can consider the following:

1. Replace the faulty electric or auxiliary transmission fluid pump ‘A’ if it is determined to be the cause of the high voltage condition.
2. Repair or replace any damaged wiring or connectors in the motor supply circuit.
3. Ensure that the power source supplying voltage to the pump is within the specified range.

How to erase DTC P0B0B on BMW

To erase DTC P0B0B on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. Once the issue has been addressed and fixed, the codes can be cleared to reset the Check Engine Light.

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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