P0363
Misfire Detected - Fueling Disabled
Severe misfire detected — the PCM has disabled fuel injection on the affected cylinder(s) to protect the catalyst from raw fuel. Common protective response on heavy or sustained misfire conditions.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light on or flashing
- Rough idle and uneven running
- Power loss, hesitation under acceleration
- Increased fuel consumption
- Possible smell of unburned fuel from exhaust
Common causes
Ordered by how often each turns out to be the cause.
- Severe misfire — read companion P030x codesCommon
Parts involved
- Fuel Injector
- Ignition Coil
- Powertrain Control Module
P0363 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.