U027B
Lost Communication with Battery Charger Control Module D
U027B is an OBD-II diagnostic trouble code meaning: Lost Communication with Battery Charger Control Module D. Common causes: charging control module malfunction, open or short circuit in wiring. Estimated repair cost: $44–167.
Symptoms
- Low battery
- Malfunction warning on the dashboard
- Problems starting the engine
- Charging system not working
- Loss of communication with other modules
Causes
- Charging control module malfunction
- Open or short circuit in wiring
- Problems with the CAN network
- Contact corrosion
- Module software error
How to Fix
- Check power supply and grounding of the module
- Diagnose the CAN network for errors
- Inspect and check the integrity of the wiring
- Reboot or update module software
- Replace the charging control module if necessary
Related codes
Error U027B by Vehicle Brand
FAQ
What does the U027B code mean?
U027B is an OBD-II diagnostic trouble code that indicates: Lost Communication with Battery Charger Control Module D
What causes a U027B error code?
The most common causes of U027B include: Charging control module malfunction; Open or short circuit in wiring; Problems with the CAN network; Contact corrosion.
How do I fix a U027B diagnostic trouble code?
To fix U027B: Check power supply and grounding of the module. Diagnose the CAN network for errors. Inspect and check the integrity of the wiring. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U027B?
Do not drive — repair immediately
How much does it cost to fix U027B?
The estimated repair cost for U027B is $44–167. Actual cost depends on your vehicle, location, and labor rates.
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