It is a cylinder misfiler on cylinder #3. Many times it is a defective coil-on-plug (COP) but not always
Trouble code P0303 means:Cylinder 3 misfire detected
Trouble code P0303 means: Cylinder 3 Misfire Detected
Trouble code P0303 means: Cylinder Number 3 Misfire Detected
A P0303 error code is caused by misfire on piston 3. This can come as a result of a bad spark plug, damaged wires, or even a problem with the vehicle's computer.
Trouble code P0403 means:Exhaust gas recirculation circuit malfunction
Trouble code P0303 means: Cylinder Number 3 Misfire Detected Trouble code P0535 means: A/C Evaporator Temperature Sensor Circuit
Depending on which tester you used to determine the code look at the teters manual
Trouble code P0303 means:Cylinder 3 misfire detected
Trouble code P0303 means:Cylinder 3 misfire detected
#3 cylinder misfire.
Trouble code P0303 means:Cylinder 3 misfire detected
Trouble code P0303 means:Cylinder 3 misfire detected