P0A7B

Battery Energy Control Module Requested MIL Illumination

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$167–556 (est.)

Symptoms

Check Engine Light Is On
Reduced vehicle power
Switching to emergency mode
Battery charging problems
Increased fuel consumption (in hybrids)

Causes

Battery Energy Management Module Malfunction
Problems with the module software
High voltage battery fault
Problems with wiring or connectors
Interaction with other vehicle systems

How to Fix

Diagnostics using specialized equipment
Checking the condition of the high-voltage battery
Checking module connections and wiring
Module software update
Replacing the Battery Energy Management Module if necessary

Related codes

P0A7A P0A7C P0A7D