Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
304
Specific fault index within the subsystem.
Frequently asked questions about P0304
What does P0304 mean?
Cylinder 4 - misfire detected. The control module detected crankshaft speed fluctuations consistent with combustion misfire (Cylinder 4).
Is P0304 generic or manufacturer-specific?
P0304 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0304 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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