Hi there:
DTC P0622 - Generator Field Control Circuit
This is a trouble code relates to the charging system and means that the Powertrain Control Module is trying to control the generator field with no result during monitoring.
This problem could be caused:
- open/shorted within the field control circuit between the PCM and the alternator ( a brown/gray wire ),
- generator ground circuit (brown/black wire),
- generator itself, or
- faulty PCM.
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