PowertrainP0D21

Caution

Severity: Caution - get it checked when you can

Battery Charger A Output Voltage Too Low

16 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

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Vacuum or intake leak
Fuel or ignition problem
Control module fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

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 16

Brand	Code	Description	System
Ashok Leyland CV	P0D21	Throttle Position Sensor. High Signal Brand	Powertrain
Daewoo	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
DFFS	P0D21	Input failure on the right side of audio equipment Brand	Powertrain
EOBD	P0D21	Laadija 'A' väljpinge liiga madal Brand	Powertrain
Ford	P0D21	Case1-1 Ch0 Brand	Powertrain
GM	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
Holden	P0D21	Battery Charger Output Low Voltage Brand	Powertrain
Honda	P0D21	OBC Output Voltage Too Low Brand	Powertrain
Hyundai	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
Isuzu	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
Land Rover	P0D21	Battery Charger Output Voltage Too Low Brand	Powertrain
Opel	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
Peugeot	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
Proton	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
Saab	P0D21	Battery Charger A Output Voltage Too Low SAE	Powertrain
Toyota	P0D21	Input failure on the right side of audio equipment 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 P0D21 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P0D21A2	The output voltage of the on-board charger is too low. The system voltage is too low. Brand	Powertrain
Mercedes-Benz	P0D21FA	The output voltage of the on-board charger is too low.DCDC1 Brand	Powertrain
Mercedes-Benz	P0D21FB	The output voltage of the on-board charger is too low.DCDC2 Brand	Powertrain

6Related codes

Browse Pxxx codes or P0D2xx codes.