Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
303
Specific fault index within the subsystem.
Frequently asked questions about P0303
What does P0303 mean?
Cylinder 3 - misfire detected. The control module detected crankshaft speed fluctuations consistent with combustion misfire (Cylinder 3).
Is P0303 generic or manufacturer-specific?
P0303 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0303 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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