Generator A Mechanical Performance
The alternator A reports a mechanical performance issue - typically a slipping belt, worn pulley clutch, or seizing rotor that causes the output to lag behind speed.
Affected components
- Alternator
- Alternator pulley
- Drive belt
Common causes
- High likelihood: Drive belt slipping
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
Related codes
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.