P0363

Misfire Detected - Fueling Disabled

Q: Is it safe to drive with P0363?

No. The computer has already cut fuel to a cylinder to avoid dumping raw fuel into the converter. Continued driving risks overheating and destroying the catalytic converter.

Q: Can I just clear P0363?

It will return quickly. The underlying misfire has to be repaired before the computer restores normal fueling.

Ignition / misfire Generic OBD-II High

What it means

P0363 means the engine computer detected a misfire serious enough that it disabled fuel injection to the affected cylinder. It does this to keep unburnt fuel out of the exhaust, which would otherwise overheat and damage the catalytic converter. The cause is a genuine misfire — usually ignition, fuel, or compression — and it needs prompt repair.

High

Can I keep driving? Drive as little as possible — the misfire was severe enough that the computer shut off fuel to the affected cylinder to protect the catalytic converter.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on (often flashing during the misfire)
Rough running, shaking, and a distinct dead-cylinder feel
Noticeable loss of power and hesitation
Increased fuel use and possible fuel smell

Common causes

Most likely first

Worn spark plug or failing ignition coil on the affected cylinderLikely
Clogged, leaking, or dead fuel injectorCommon
Vacuum or intake leak causing a lean misfireCommon
Low fuel pressureLess often
Low compression (valve, ring, or head-gasket issue)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame and any cylinder-specific misfire codes to find the dead cylinder.
Inspect and replace the spark plug and coil on that cylinder first — the most common cause.
Check the injector and test for a vacuum leak around the intake.
Verify fuel pressure and delivery.
If it persists, run a compression test on the affected cylinder, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0363?+

No. The computer has already cut fuel to a cylinder to avoid dumping raw fuel into the converter. Continued driving risks overheating and destroying the catalytic converter.

Can I just clear P0363?+

It will return quickly. The underlying misfire has to be repaired before the computer restores normal fueling.

Read & clear P0363 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX