What does code P0622 mean?
A malfunction is detected in the alternator field (F terminal) control circuit.
OBD-II Code
P0622 — Generator Field F Control Circuit Malfunction
A malfunction is detected in the alternator field (F terminal) control circuit.
Common symptoms
- Alternator not charging
- unstable system voltage
Possible causes
- Failed internal regulator
- broken wire
- PCM unable to control field current
Initial recommendation
Test alternator field control signal, inspect wiring and replace alternator or regulator as needed.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0622 with your vehicle's actual symptoms for more complete diagnostic guidance.
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