PowertrainP0620

Serious

Severity: Serious - have it checked soon

Generator Control Circuit

35 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

Safety: This code relates to the charging system. The battery may go flat and the car may stall.

1What it means in plain English

The engine computer or one of its output circuits has a fault.

2Common causes

Engine control module fault
Power or ground connection problem
Low battery or charging voltage
Wiring short or open circuit
Software or memory fault

3Can I drive?

Serious · drive with care

If the engine runs normally, drive carefully to a workshop for diagnosis. If it runs badly, stalls, or will not restart, have the car towed.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 35

Brand	Code	Description	System
Ashok Leyland CV	P0620	Idle Air Control System RPM Higher Than Expected Brand	Powertrain
BAIC Motor	P0620	Generator Control Circuit Brand	Powertrain
Mercedes-Benz	P0620	Generator Control Circuit SAE	Powertrain
BMW	P0620	electrical fault Brand	Powertrain
BYD	P0620	Alternator load fault Brand	Powertrain
Chery	P0620	Generator Control Circuit Brand	Powertrain
Chrysler	P0620	Generator Control Circuit SAE	Powertrain
Daewoo	P0620	Generator Control Circuit Brand	Powertrain
Daihatsu	P0620	Alternator C terminal duty cycle abnormal Brand	Powertrain
DFFS	P0620	Generator Control Circuit Brand	Powertrain
DFFX	P0620	Generator Control Circuit Brand	Powertrain
DFXK	P0620	Generator Control Circuit Brand	Powertrain
EOBD	P0620	Generator styrkrets Brand	Powertrain
Ford	P0620	Generator Control Circuit SAE	Powertrain
Geely	P0620	Generator Control Circuit Brand	Powertrain
GM	P0620	Generator performance Brand	Powertrain
Great Wall	P0620	Generator Control Circuit Brand	Powertrain
Hafei	P0620	Generator Control Circuit Brand	Powertrain
Holden	P0620	Generator L-Terminal Circuit Brand	Powertrain
Hyundai	P0620	Generator Control Circuit SAE	Powertrain
Isuzu	P0620	Generator Control Circuit SAE	Powertrain
Land Rover	P0620	Generator control circuit Brand	Powertrain
Mazda	P0620	Generator Control Circuit SAE	Powertrain
Mitsubishi	P0620	Alternator control circuit Brand	Powertrain
Opel	P0620	Generator performance Brand	Powertrain
Perodua	P0620	Alternator C terminal duty cycle abnormal Brand	Powertrain
Peugeot	P0620	Generator Control Circuit SAE	Powertrain
Proton	P0620	Alternator control circuit Brand	Powertrain
Saab	P0620	Desempenho do Gerador Brand	Powertrain
MG (SAIC)	P0620	Generator Control Circuit Brand	Powertrain
Subaru	P0620	Generator Control Circuit SAE	Powertrain
Suzuki	P0620	Generator control circuit Brand	Powertrain
Tata	P0620	Generator Control Circuit Brand	Powertrain
Toyota	P0620	Alternator control signal failure Brand	Powertrain
Volkswagen	P0620	SAE: Generator Control Circuit Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 3

These 7-character codes are manufacturer-specific variants of P0620 and may be reported by some scan tools.

Brand	Code	Description	System
Hyundai	P062000	ECM set DTC If it is open or short in Control circuit of alternator. If this DTC is set, Idle stop is not performing Brand	Powertrain
SsangYong	P062000	L-Terminal electrical diagnosis (ECU side) short-circuit to battery Brand	Powertrain
SsangYong	P062001	L-Terminal electrical diagnosis (ECU side)short-circuit to ground / open Brand	Powertrain

6Related codes

Browse Pxxx codes or P062xx codes.