Powertrain
generic / SAE
P065B
Generator A Control Circuit Range or Performance
The PWM control line to the alternator A regulator does not deliver the expected charging response - high contact resistance, regulator drift, or wrong calibration.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 5B
Possible causes
- Regulator response drifted 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