PowertrainP0303

Serious

Severity: Serious - have it checked soon

Cylinder 3 Misfire Detected

45 brands affected · Generic SAE J2012 description.

Key terms: Catalytic converter: cleans the exhaust gases · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

Cylinder 3 is not firing properly. The fuel in that cylinder is not burning as it should.

2Common causes

Worn or fouled spark plug in cylinder 3
Faulty ignition coil for cylinder 3
Faulty fuel injector for cylinder 3
Vacuum or intake air leak
Low fuel pressure
Low compression in cylinder 3

3Can I drive?

Serious · drive with care

Drive gently to a workshop. If the check-engine light is flashing, stop as soon as it is safe and have the car towed: a flashing light means the misfire can overheat and damage the catalytic converter.

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 45

Brand	Code	Description	System
Ashok Leyland CV	P0303	Hybrid Battery. Cell Balancing. Control Circuit. 'A'. - Operation Failure Brand	Powertrain
BAIC Motor	P0303	Missfire 1 Brand	Powertrain
Mercedes-Benz	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
BMW	P0303	Exhaust-damaging misfire Brand	Powertrain
BYD	P0303	Cylinder 3 misfire Brand	Powertrain
Chery	P0303	CYL No.3 MISS Brand	Powertrain
Chrysler	P0303	Cylinder 3 misfire Brand	Powertrain
Daewoo	P0303	Cylinder 3 misfire Brand	Powertrain
Daihatsu	P0303	Misfire Brand	Powertrain
DFFS	P0303	Cylinder 3 misfire Brand	Powertrain
DFFX	P0303	Cylinder 1 misfire Brand	Powertrain
DFXK	P0303	Cylinder 3 Misfire Brand	Powertrain
EOBD	P0303	Cylinder 3 misfire detected Brand	Powertrain
Ford	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Geely	P0303	Cylinder 3 Misfire Brand	Powertrain
GM	P0303	Cylinder 3 Misfire Detected Brand	Powertrain
Great Wall	P0303	Cylinder 3 misfire Brand	Powertrain
Hafei	P0303	Cylinder 3 Misfire Detected Brand	Powertrain
Holden	P0303	Cylinder 3 Misfire Detected Brand	Powertrain
Honda	P0303	P0339, P0302, Update Brand	Powertrain
Hyundai	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Isuzu	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Land Rover	P0303	Single cylinder misfiring Brand	Powertrain
Mahindra	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Maserati	P0303	Cylinder 3 misfire Brand	Powertrain
Mazda	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Mitsubishi	P0303	No.3 cylinder misfire detected Brand	Powertrain
Nissan	P0303	Cycle 3 misfire Brand	Powertrain
Opel	P0303	Cylinder 3 Misfire Detected Brand	Powertrain
Perodua	P0303	Misfire Brand	Powertrain
Peugeot	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Porsche	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Proton	P0303	Cylinder 3 Misfire Detected Brand	Powertrain
Renault	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Saab	P0303	Cylinder 3 Misfire Detected Brand	Powertrain
MG (SAIC)	P0303	Misfire Cylinder 3 Brand	Powertrain
Smart	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Sprinter	P0303	Cylinder 3 Misfire Detected SAE	Powertrain
Subaru	P0303	Cylinder 3 Misfire Detected Brand	Powertrain
Suzuki	P0303	Cylinder 3 misfire detected Brand	Powertrain
SWM Motor	P0303	Cylinder 3 misfire Brand	Powertrain
Tata	P0303	Misfire - Cylinder 3 Brand	Powertrain
Toyota	P0303	Cylinder 3 misfire Brand	Powertrain
Volvo	P0303	ECM- XX: cylinder 3 Brand	Powertrain
Volkswagen	P0303	Cylinder 3: misfire detected 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 1

These 7-character codes are manufacturer-specific variants of P0303 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	P030300	No.3 cylinder - poor ignition Brand	Powertrain

6Related codes

Browse Pxxx codes or P030xx codes.