Code result
P0620
Generator Control Circuit Malfunction
Moderate severity
What it means
General electrical fault detected in the alternator/generator control circuit. The ECU regulates field excitation on most modern alternators; a fault here causes charging issues and may set additional battery voltage codes.
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
Alternator regulator failed
highOne of the most commonly reported causes for this code — check this first.
Wiring or connector fault
mediumA plausible cause — test and verify before replacing parts.
Related help
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