P0620 – Generator Control Circuit
Description
The generator/alternator control circuit is malfunctioning.
Need More Than Just the Fault Code?
A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.
Compare Diagnostic ScannersSymptoms
- Dim lights
- Battery warning
- Slow cranking
- Poor acceleration
- Check engine light
Causes
- Faulty alternator
- Weak battery
- Damaged wiring
- Loose connections
- ECU issue
Diagnosis
- Test alternator
- Test battery
- Inspect wiring
- Check grounds
- Scan live data
Repair
- Replace alternator
- Replace battery
- Repair wiring
- Fix grounds
- Update ECU