P0622 OBD II Trouble Code Generator Field F Control Circuit Malfunction

How to easily diagnose, repair, and info on causes of a P0622 trouble code that indicates a detected failure of the generator lamp F control circuit.

Symptoms of P0622 OBD II Trouble Code

  • Engine drivability issues
  • Engine stall when idling
  • Inadvertent engine shutoff
  • Delayed engine cranking
  • Other stored codes

Common Causes of P0622 OBD II Trouble Code

  • Faulty PCM
  • PCM programming error
  • Open or shorted generator field control circuit
  • Defective alternator/generator

Severity of P0622 OBD II Trouble Code

Internal control module codes be considered severe. A stored code P0622 could result in a variety of drivability concerns, including a no-start and/or dead battery condition.