Powertrain
generic / SAE
P063D
Generator Voltage Sense Circuit A High
Same as P063A with the sense voltage above the plausible range.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 3D
Possible causes
- Sense line shorted to supply high
- Pack cell imbalance approaching service threshold low
- Ground point with elevated resistance low
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: 80–350 €
- Estimated time: 0.5–1.8 h
- Component: alternator voltage sense a
- MIL / check engine light
Sources
References
sae:J2012