U028A
Lost Communication With Transmission Fluid Pump Module B
U028A is an OBD-II diagnostic trouble code meaning: Lost Communication With Transmission Fluid Pump Module B. Common causes: open or short circuit in the communication circuit, poor contact in module connectors. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- Gear shifting problems
- Unusual noises from the transmission
- Reduced vehicle dynamics
- Transmission transition to emergency mode
Causes
- Open or short circuit in the communication circuit
- Poor contact in module connectors
- Transmission fluid pump module malfunction
- Problems with module power or grounding
- Transmission ECU malfunction
How to Fix
- Check the integrity of the communication circuit between the ECU and the module
- Inspect and clean connector contacts
- Check power supply and grounding of the module
- Test or replace pump module
- Check the condition of the transmission ECU
Related codes
Error U028A by Vehicle Brand
FAQ
What does the U028A code mean?
U028A is an OBD-II diagnostic trouble code that indicates: Lost Communication With Transmission Fluid Pump Module B
What causes a U028A error code?
The most common causes of U028A include: Open or short circuit in the communication circuit; Poor contact in module connectors; Transmission fluid pump module malfunction; Problems with module power or grounding.
How do I fix a U028A diagnostic trouble code?
To fix U028A: Check the integrity of the communication circuit between the ECU and the module. Inspect and clean connector contacts. Check power supply and grounding of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U028A?
Limited driving only, diagnose soon
How much does it cost to fix U028A?
The estimated repair cost for U028A is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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