U028A – BMW DTC

BMW DTC U028A – Lost Communication With Transmission Fluid Pump Module ‘B’

DTC U028A meaning on BMW

DTC U028A on a BMW indicates a communication error between the vehicle’s control module and the Transmission Fluid Pump Module ‘B’. This error code signifies that the control module has lost communication with the Transmission Fluid Pump Module ‘B’, which can lead to various transmission-related issues.

BMW DTC U028A symptoms

Symptoms of DTC U028A on a BMW may include:

• Transmission shifting problems
• Transmission slipping
• Harsh or delayed shifting
• Reduced fuel efficiency
• Illuminated transmission warning light

BMW DTC U028A causes

Common causes of DTC U028A on a BMW include:

• Faulty Transmission Fluid Pump Module ‘B’
• Wiring or connection issues between the control module and the Transmission Fluid Pump Module ‘B’
• Defective control module
• Software glitches

BMW DTC U028A seriousness

DTC U028A should not be ignored as it can lead to potential transmission malfunctions, which may result in drivability issues and potential safety concerns. It is recommended to address this error code promptly to prevent further damage to the transmission system.

How to diagnose DTC U028A on BMW

To diagnose DTC U028A on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s system
2. Inspect the wiring and connections between the control module and the Transmission Fluid Pump Module ‘B’
3. Check the Transmission Fluid Pump Module ‘B’ for any signs of damage or malfunction
4. Perform a communication test to verify the connection between the modules

How to fix DTC U028A on BMW

To fix DTC U028A on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connections between the control module and the Transmission Fluid Pump Module ‘B’
2. Replace the faulty Transmission Fluid Pump Module ‘B’ if necessary
3. Update the control module software to address any software-related issues
4. Clear the fault codes and perform a test drive to ensure the issue has been resolved

How to erase DTC U028A on BMW

To erase DTC U028A on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault codes stored in the vehicle’s system
2. Perform a test drive to ensure the fault code does not reappear

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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