Powertrain
generic / SAE
P0622
Generator Field F Control Circuit
The control circuit for the generator field terminal (F) reports a fault. The ECM cannot regulate field current as expected.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 22
Possible causes
- Field circuit open or shorted high
- Alternator regulator fault medium
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: shop recommended
- Estimated cost: 120–800 €
- Estimated time: 0.5–2.5 h
- Component: alternator
- Component: alternator wiring
- MIL / check engine light
Sources
References
sae:J2012