Generator Control Circuit Malfunction
Verified1 source
1 source
- Official data (NHTSA)official_feed
What P0620 means
Caution — monitor closely
The alternator/generator control circuit signal is malfunctioning.
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General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.
Common causes
- Generator Control Circuit Malfunction
What to check first
- Test alternator output
- Inspect control wiring
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