PowertrainP00C4

Caution

Severity: Caution - get it checked when you can

Electronic control unit failure

15 brands affected · Description from Toyota data.

Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Powertrain: engine, transmission and emissions

1What it means in plain English

This code is in the fuel and air metering range, which includes fuel-pressure and camshaft-timing faults.

2Common causes

Dirty or faulty mass air flow sensor
Vacuum or intake air leak
Weak fuel pump or clogged fuel filter
Faulty fuel injector
Faulty oxygen sensor
Wiring or connector fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. Some codes in this range affect fuel pressure or camshaft timing; if the engine loses power, runs badly, or stalls, stop safely and get professional help.

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 15

Brand	Code	Description	System
Ashok Leyland CV	P00C4	No description available	Powertrain
Daewoo	P00C4	No description available	Powertrain
DFFS	P00C4	Electronic control unit failure Brand	Powertrain
EOBD	P00C4	Turbolader/compressor bypassklep 'B' - mechanisch Brand	Powertrain
GM	P00C4	No description available	Powertrain
Holden	P00C4	Turbocharger Bypass Valve Stuck Bank 2 Brand	Powertrain
Honda	P00C4	No description available	Powertrain
Isuzu	P00C4	No description available	Powertrain
Land Rover	P00C4	Turbocharger/Supercharger Bypass Valve 'B' - Mechanical Brand	Powertrain
Maserati	P00C4	Turbocharger/Supercharger Bypass Valve 2 - Mechanical Brand	Powertrain
Mitsubishi	P00C4	No description available	Powertrain
Opel	P00C4	No description available	Powertrain
Peugeot	P00C4	No description available	Powertrain
Saab	P00C4	No description available	Powertrain
Toyota	P00C4	Electronic control unit failure 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 2

These 7-character codes are manufacturer-specific variants of P00C4 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P00C442	CPC Signal invalid Brand	Powertrain
Mercedes-Benz	P00C44B	Battery signal not valid Brand	Powertrain

6Related codes

Browse Pxxx codes or P00Cxx codes.