PowertrainP063D

Serious

Severity: Serious - have it checked soon

ECU internal fault (driver knee airbag ignition system)

20 brands affected · Description from Toyota data.

Key terms: Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions

Safety: This code relates to the airbag or seat-belt restraint system. An airbag may not deploy in a crash.

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 20

Brand	Code	Description	System
Ashok Leyland CV	P063D	The Self-Test Has Failed. Error In Shut-Off Paths During Initialisation. Low Voltage Or Short Circuit To Ground Brand	Powertrain
BAIC Motor	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
BYD	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
Chery	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
Daewoo	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
DFFS	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
DFFX	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
DFXK	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
EOBD	P063D	Spanningsmeetcircuit dynamo 'A' hoog Brand	Powertrain
Geely	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
GM	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
Great Wall	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
Hafei	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
Hyundai	P063D	No description available	Powertrain
Isuzu	P063D	No description available	Powertrain
Land Rover	P063D	Generator voltage sense - circuit high Brand	Powertrain
Peugeot	P063D	No description available	Powertrain
Saab	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
MG (SAIC)	P063D	Generator Voltage Sense Circuit High Brand	Powertrain
Toyota	P063D	ECU internal fault (driver knee airbag ignition system) 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.

5Related codes

Browse Pxxx codes or P063xx codes.