Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
UNKNOWN
Reported code forms P0303
MULTIPLE MISFIRES DETECTED ON SEVERAL CYLINDERS ABOVE A CERTAIN ENGINE SPEED (RPM). MAY BE ACCOMPANIED BY DIAGNOSTIC TROUBLE CODES (DTC) P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 AND P0308. ENGINE SPEED…
AUDI
Reported code forms P0303
IGNITION COIL, MISFIRE DIAGNOSIS. MALFUNCTION INDICATOR LIGHT ON/FLASHING; ENGINE RUNNING ROUGH; LOSS OF POWER; DIAGNOSTIC TROUBLE CODES P0300, P0301, P0302, P0303, P0304, P0305 OR P0306 STORED. *TT
VOLKSWAGEN
Reported code forms P0303
MISFIRE, INCORRECT CYLINDER FAULT CODES P0301, P0302, P0303 OR P0304 IDENTIFIED BY ECM SOFTWARE. *TT
FORD
Reported code forms P0303
SOME VEHICLES EQUIPPED WITH THE 2.0L SPI ENGINE MAY EXHIBIT A CHECK ENGINE LIGHT ON AND DIAGNOSTIC TROUBLE CODE P0301, P0302, P0303, AND P0304 (MISFIRE CYL). *TT
MITSUBISHI
Reported code forms P0303
ON SOME VEHICLES EQUIPPED WITH V6 ENGINE PRODUCED BEFORE 2/9/00 (VIN1J002592) , METAL BURRS IN THE FRONT EXHAUST PIPE COULD BECOME LOOSE AND TRAVEL INTO THE ENGINE CYLINDERS DURING ENGINE OPERATION. THIS MAY RESULT IN…
HONDA
Reported code forms P0303
EXHIBITING A MALFUNCTION INDICATOR LIGHT ON WITH DIAGNOSTIC TROUBLE CODES P0302, P0303, P0304, OR P0306. *TT
HONDA
Reported code forms P0303
MALFUNCTION INDICATOR LIGHT ON WITH MISFIRE DIAGNOSTIC TROUBLE CODES P0301, P0302, P0303, OR P0304. *TT
HONDA
Reported code forms P0303
SOME VEHICLES MAY EXHIBIT A MALFUNCTION INDICATOR LIGHT ON WITH MISFIRE DIAGNOSTIC TROUBLE CODES P0301, P0302, P0303, OR P0304. *TT
SATURN
Reported code forms P0303
VEHICLES EQUIPPED WITH DOHC (LLO) ENGINES MAY EXPERIENCE THE MALFUNCTION INDICATOR LAMP (MIL) (SERVICE ENGINE SOON TELLTALE LAMP) ON WITH DTC P0300 AND / OR P0301, P0302, P0303, OR P0304. *TT
SATURN
Reported code forms P0303
SOME VEHICLES EQUIPPED WITH DOHC ENGINES MAY EXPERIENCE THE MALFUNCTION INDICATOR LAMP (MIL)(SERVICE ENGINE SOON TELLTALE LAMP) ON WITH DIAGNOSTIC TROUBLE CODES P0300 AND / OR P0301, P0302, P0303, OR P0304. *TT
SATURN
Reported code forms P0303
VEHICLES EQUIPPED WITH SOHC (L24) ENGINES MAY EXPERIENCE THE SERVICE ENGINE SOON LIGHT ON WITH DIAGNOSTIC TROUBLE CODES P0300 AND / P0301, P0302, P0303, OR P0304. *TT
HONDA
Reported code forms P0303
MALFUNCTION INDICATOR LAMP (MIL) IS ON WITH MISFIRE DIAGNOSTIC TROUBLE CODE(S) (DTC(S) P0301, P0302, P0303, P0304. *TT
HONDA
Reported code forms P0303
CONCERNS WITH THE MALFUNCTION INDICATOR LIGHT COMING ON WITH MISFIRE DIAGNOSTIC TROUBLE CODES (DTC(S) P0301, P0302, P0303, P0304. *TT
FORD, MERCURY
Reported code forms P0303
SUBJECT REGARDING THE MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED AND DIAGNOSTIC TROUBLE CODES (DTCS) P0300, P0302, P0303, P0304, P0305, AND / OR P0306 STORED IN MEMORY. *TT
SATURN
Reported code forms P0303
CONCERNS WITH (MIL) SERVICE ENGINE SOON TELLTALE LAMP ON WITH DTCS P0300 AND/OR P0301, P0302, P0303, OR P0304. *YC
FORD, MERCURY
Reported code forms P0303
INFORMATION REGARDING THE MALFUNCTION INDICATOR LIGHT (MIL) AND MISFIRE DIAGNOSTIC TROUBLE CODES (DTCS) P0300, P0301, P0302, P0303, P0304, P0305, AND P0306 WITH NO DRIVEABILITY CONCERNS. *TT
SAAB
Reported code forms P0303
TECHNICAL SERVICE BROADCAST ON DIAGNOSING CODES P0300, P0301, P0302, P0303, P0304. *TT
BUICK, CHEVROLET, OLDSMOBILE, PONTIAC
Reported code forms P0303
EXHIBITING DIAGNOSTIC TROUBLE CODES P0300, P0301, P0302, P0303, AND P0304 INDICATING ENGINE MISFIRE CONDITIONS. *YC
MAZDA
Reported code forms P0303
MIL ILLUMINATION - P0300, P0301, P0302, P0303, P0304, P0305, AND/OR P0306 WITH NO DRIVABILITY CONCERNS. *TW
FORD, MERCURY
Reported code forms P0303
MALFUNCTION INDICATOR LAMP (MIL) - DIAGNOSTIC TROUBLE CODES (DTCS) P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, AND/OR P0308 STORED IN MEMORY. *TW
FORD, LINCOLN, MERCURY
Reported code forms P0303
MALFUNCTION INDICATOR LAMP (MIL) - DIAGNOSTIC TROUBLE CODES (DTCS) P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 AND/OR P0308 STORED IN MEMORY. *TW
FORD
Reported code forms P0303
MISFIRE DTC'S P0316, P0300, P0301, P0302, P0303, AND P0304. *KB
CADILLAC
Reported code forms P0303
3.6 LY7 MISFIRE DTC P0300 P0301 P0302 P0303 P0304 P0305 P0306. *TT