P1A4E
Battery Energy Control Module Hybrid Battery System Voltage High
Severity
🚨 CriticalCan you drive?
Do not drive — repair immediately
Approx. repair cost
$167–2778 (est.)
Symptoms
- Check Engine light comes on
- Hybrid system power reduction
- The car goes into emergency mode
- Unusual sounds from hybrid battery
- Error message on display
Causes
- Hybrid battery malfunction
- Problems with the charging system
- Battery Energy Management Module Malfunction
- Damage to high voltage wiring
- Software error in the control system
How to Fix
- Diagnostics of the hybrid battery system
- Checking the voltage at the battery terminals
- Inspect high-voltage wiring for damage
- Battery Energy Management Module Testing
- Repair or replace the hybrid battery if necessary
- Repair only from an authorized dealer