U027A
Lost Communication With Battery Charger Control Module C
U027A is an OBD-II diagnostic trouble code meaning: Lost Communication With Battery Charger Control Module C. Common causes: open or short circuit in the communication circuit, problems with power supply to the charging module. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Problems starting the engine
- Reduced efficiency of the start-stop system
- Incorrect battery level readings
- Error messages in the on-board computer
Causes
- Open or short circuit in the communication circuit
- Problems with power supply to the charging module
- Malfunction of the charging module itself
- Wiring Harness Problems
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of the communication circuit between the ECU and the charging module
- Check power supply and grounding of the module
- Inspect connectors and contacts for corrosion
- Scan the charging module for internal errors
- If necessary, replace the battery charging module
Related codes
Error U027A by Vehicle Brand
FAQ
What does the U027A code mean?
U027A is an OBD-II diagnostic trouble code that indicates: Lost Communication With Battery Charger Control Module C
What causes a U027A error code?
The most common causes of U027A include: Open or short circuit in the communication circuit; Problems with power supply to the charging module; Malfunction of the charging module itself; Wiring Harness Problems.
How do I fix a U027A diagnostic trouble code?
To fix U027A: Check the integrity of the communication circuit between the ECU and the charging module. Check power supply and grounding of the module. Inspect connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U027A?
Limited driving only, diagnose soon
How much does it cost to fix U027A?
The estimated repair cost for U027A is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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