U04B1
Invalid Data Received From Battery Monitor Module
U04B1 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Battery Monitor Module. Common causes: battery monitoring module malfunction, broken or damaged wires in the communication circuit. Estimated repair cost: $28–94.
Symptoms
- Error message on the dashboard
- Disabling the start-stop system
- Incorrect battery voltage readings
- Battery charging problems
- Reduced efficiency of the power system
Causes
- Battery monitoring module malfunction
- Broken or damaged wires in the communication circuit
- Poor contact in connectors
- Software error in the control module
- Problems with the main on-board computer
How to Fix
- Check the integrity of the communication circuit between the module and the on-board computer
- Inspect and clean the contacts in the module connectors
- Check the supply voltage and ground of the control module
- Scan the module for additional errors
- If necessary, replace the battery monitoring module
Related codes
Error U04B1 by Vehicle Brand
FAQ
What does the U04B1 code mean?
U04B1 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Battery Monitor Module
What causes a U04B1 error code?
The most common causes of U04B1 include: Battery monitoring module malfunction; Broken or damaged wires in the communication circuit; Poor contact in connectors; Software error in the control module.
How do I fix a U04B1 diagnostic trouble code?
To fix U04B1: Check the integrity of the communication circuit between the module and the on-board computer. Inspect and clean the contacts in the module connectors. Check the supply voltage and ground of the control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U04B1?
Yes, but get it checked soon
How much does it cost to fix U04B1?
The estimated repair cost for U04B1 is $28–94. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat