Powertrain
generic / SAE
P0625
Generator Field Terminal Circuit Low
Voltage on the alternator F terminal (field excitation) is below threshold — open or short to ground in the excitation path.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 25
Possible causes
- Field circuit open or shorted to ground high
- Alternator brushes worn medium
- Connector pins corroded - high contact 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: 80–700 €
- Estimated time: 0.5–3 h
- Component: alternator
- Component: alternator wiring
- MIL / check engine light
Sources
References
sae:J2012