U01BB

Lost Communication With Battery Charger Control Module B

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced battery charging efficiency
Problems starting the engine
Power reduction in hybrid systems
Errors in the charging system on the dashboard

Causes

Broken or damaged wires in the communication circuit
Battery charging control module B faulty
Connector problems or contact corrosion
Failures in ECU software
Module power problems

How to Fix

Check the integrity of the wiring harness and connectors
Check the power and ground of the control module
Scan the module for additional errors
Replace the charging control module if necessary
Update ECU software if necessary

Related codes

U01BA U01BC U01BD