OBD-II code · Powertrain (generic)
P0626 Generator Field/F Terminal Circuit Performance
The generator field circuit response does not match command. Field current ramps slowly, drifts or fails to reach commanded values during regulation.
Is it safe to drive with P0626?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRegulator or rotor fault
- PossibleField circuit high resistance
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Alternator, Alternator Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.