P0563Średni
Napięcie systemu — wysokie
Układ napędowy
Sprawdź szczegóły →P0620
WysokiGenerator (Alternator) Control Circuit Malfunction
OBD-II (EN): Generator Control Circuit Malfunction
Code P0620 indicates a problem in the alternator control circuit – the component responsible for charging your car's battery. This primarily manifests as a charge warning light on the dashboard, starting problems, and risk of sudden battery discharge. Causes range from a damaged signal wire, faulty voltage regulator, to issues with electronic modules (BSM, ECU). Precise diagnosis requires checking the entire charging circuit by a qualified workshop.
Symptoms
Battery charge warning light on dashboard; engine starting problems; discharged battery; unstable engine idle; increased fuel consumption; possible engine stalling while driving; limp mode activation in some vehicles.
Possible causes
Damaged or corroded DFM/LIN signal wire between alternator and ECU (common in PSA vehicles – purple wire through BSM); Damaged connectors (corroded terminals, breaks in BSM); Faulty voltage regulator in alternator; Faulty ECU/PCM or BSM module (fuse box); Faulty alternator (worn brushes, diodes); Corrosion or moisture near alternator and wiring harness;
Affected systems
układ ładowania (alternator)moduł sterowania silnika (ECU/PCM)moduł BSM (w pojazdach PSA)instalacja elektryczna pojazduukład zarządzania energią
Related codes
P0562Średni
Napięcie systemu — niskie
Układ napędowy
Sprawdź szczegóły →Sources and further reading
Does code P0620 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.