Generator Control Circuit
General electrical fault detected in the alternator/generator control circuit. The ECU regulates field excitation on most modern alternators; a fault here causes charging issues and may set additional battery voltage codes.
Affected components
- Alternator
- Alternator wiring
Common causes
- High likelihood: Alternator regulator failed
- Medium likelihood: Wiring or connector fault
Possible symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.