P3001
Battery ECU Malfunction
Severity
🔴 HighCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)
Symptoms
- Problems starting the engine
- Frequent battery discharges
- Incorrect operation of the start-stop system
- Check engine light is on
- Reduced efficiency of regenerative braking
Causes
- Battery control unit malfunction
- Problems with wiring to the battery ECU
- Short circuit in control circuit
- ECU software error
- Damage to battery system sensors
How to Fix
- Check error codes and freeze frame data
- Diagnose the battery control unit
- Check the integrity of wiring and connections
- Flash or replace the battery ECU if necessary
- Check and replace battery system sensors