Code result
P0622
Generator Field F Control Circuit Malfunction
Moderate severity
What it means
The control circuit for the generator field terminal (F) reports a fault. The ECM cannot regulate field current as expected.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Field circuit open or shorted
highOne of the most commonly reported causes for this code — check this first.
Alternator regulator fault
mediumA plausible cause — test and verify before replacing parts.
Related help
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