U01AE

Lost Communication With Hybrid/EV Battery Interface Control Module O

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced power or transition to emergency mode
Problems charging the hybrid battery
Inability to switch to electric mode (for hybrids)
Error messages on the dashboard

Causes

Broken or damaged wires in the communication circuit
Battery management module malfunction
Module power problems
Corrosion of connectors
Software error in the control system

How to Fix

Check the integrity of the wiring harness between the modules
Check the power and ground of the battery control module
Inspect connectors for corrosion or damage
Diagnose the battery control module
Update control system software
Repair only from an authorized dealer

Related codes

U01AF U0100 U0101