Powertrain
generic / SAE
P065A
Generator System Performance
A general performance fault in the alternator system - charging output too low or too high under normal load conditions, often caused by a worn brush, a failing regulator, or harness resistance.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 5A
Possible causes
- Brushes worn high
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 150–700 €
- Estimated time: 1–3 h
- Component: alternator
- Component: alternator regulator
- MIL / check engine light
Sources
References
sae:J2012