U01BF
Lost Communication with Battery Management Control Module
U01BF is an OBD-II diagnostic trouble code meaning: Lost Communication with Battery Management Control Module. Common causes: open or short circuit in the can bus, problems with power supply to the battery management module. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Possible problems starting the engine
- Reduced charging system efficiency
- Errors in the operation of other electronic systems of the car
- The car may go into emergency mode
Causes
- Open or short circuit in the CAN bus
- Problems with power supply to the battery management module
- Malfunction of the control module itself
- Bad contacts in connectors
- Problems with module mass
How to Fix
- Check fuses associated with the battery control module
- Check the integrity of the CAN bus wiring
- Check the quality of connections and contacts in the connectors
- Diagnose the battery control module
- If necessary, replace the control module
Related codes
Error U01BF by Vehicle Brand
FAQ
What does the U01BF code mean?
U01BF is an OBD-II diagnostic trouble code that indicates: Lost Communication with Battery Management Control Module
What causes a U01BF error code?
The most common causes of U01BF include: Open or short circuit in the CAN bus; Problems with power supply to the battery management module; Malfunction of the control module itself; Bad contacts in connectors.
How do I fix a U01BF diagnostic trouble code?
To fix U01BF: Check fuses associated with the battery control module. Check the integrity of the CAN bus wiring. Check the quality of connections and contacts in the connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U01BF?
Limited driving only, diagnose soon
How much does it cost to fix U01BF?
The estimated repair cost for U01BF is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat