U01A2

Lost Communication With Hybrid/EV Battery Interface Control Module C

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–222 (est.)

Symptoms

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

Causes

Open or short circuit in CAN circuit
Problems with power supply to the battery management module
Battery management module malfunction
Corrosion or poor contact in connectors
Software problems

How to Fix

Check the integrity of the CAN wiring harness
Check power supply and grounding of the module
Inspect connectors for corrosion
Scan other modules for errors
Repair only from an authorized dealer

Related codes

U01A0 U01A1 U01A3