U027B

Lost Communication with Battery Charger Control Module D

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$44–167 (est.)

Symptoms

Low battery
Malfunction warning on the dashboard
Problems starting the engine
Charging system not working
Loss of communication with other modules

Causes

Charging control module malfunction
Open or short circuit in wiring
Problems with the CAN network
Contact corrosion
Module software error

How to Fix

Check power supply and grounding of the module
Diagnose the CAN network for errors
Inspect and check the integrity of the wiring
Reboot or update module software
Replace the charging control module if necessary

Related codes

U027A U027C U025B