P1397
System Voltage Out Of Self Test Range
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Unstable engine operation
- Problems starting the engine
- Dashboard flickering or dimming
- Reduced power of electrical equipment
Causes
- Faulty generator
- Weak or dead battery
- Damaged wiring or poor contacts
- Faulty voltage regulator
- Short circuit in the electrical system
How to Fix
- Check battery voltage with engine off
- Check the generator voltage with the engine running
- Inspect wiring and connections for damage
- Check voltage regulator
- Replace faulty components