U01A7

Lost Communication With Hybrid/EV Battery Interface Control Module H

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
The car may go into emergency mode
Reduced engine power
Errors in the operation of the hybrid system
Inability to charge the battery

Causes

Open or short circuit in the CAN bus
Battery control module malfunction
Module power problems
Corroded or damaged connectors
Software error in the module

How to Fix

Check the integrity of the CAN bus
Diagnose the battery control module
Check power supply and grounding of the module
Inspect connectors for damage
Update module software

Related codes

U01A6 U01A8 U01A9