P0363 Misfire Detected - Fueling Disabled

P0363 indicates a misfire has been detected and fueling has been disabled. The controller may shut off fuel to the affected cylinder to reduce catalyst damage and raw-fuel exposure.

Code details

Generic OBD-II · P0

System: Ignition / Misfire
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not focus only on re-enabling fuel; repair the underlying misfire before extended running to protect the catalyst.

Symptoms of P0363

Rough idle, shaking, or a stumble under acceleration.
A flashing check-engine light during an active misfire.
Power loss and higher fuel consumption.

Common causes of P0363

Worn spark plugs, ignition coils, or plug wires.
Fuel-delivery problems — injectors, pressure, or a lean/rich mixture.
Vacuum leaks, low compression, or a mechanical fault in that cylinder.

Useful checks before replacing parts

Identify the original misfire source using misfire counters, companion cylinder codes, freeze-frame data, injector command, ignition output, compression, and fuel trims.
Check whether fuel disable is active, which cylinder is affected, and whether ignition, injector, compression, valve timing, or mechanical damage caused the misfire.
Verify catalyst risk, fuel trim behavior, and cylinder contribution after repairing the root cause and restoring normal fuel control.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and pin down the fault area.