Skip the auto shop - Our mechanics make house calls

P0363 OBD-II Trouble Code: Misfire Detected - Fueling Disabled

check engine light

P0363 code definition

If the PCM has stored the P0363 code, it indicates that there has been a misfire in a cylinder, and that the PCM has disabled the fuel supply to the malfunctioning cylinder.

What the P0363 code means

There are several parts within the engine that inform the PCM of cylinder performance, including the crankshaft, the camshaft, and the engine’s general RPM. If the PCM detects that the camshaft or crankshaft positions have varied in an unusual manner, or if the engine RPM is not what it should be for the current conditions, the PCM will assume that a misfire has occurred within the cylinder related to the specific crankshaft and camshaft. The PCM then disables fuel supply to that cylinder, and stores the P0363 code.

What causes the P0363 code?

Cylinder misfire is often caused by the failure of an ignition system component. Failed spark plugs, ignition coils, and plug wires and boots could all be the root cause of the P0363 code.

Other causes for the P0363 code may include:

What are the symptoms of the P0363 code?

If the PCM has stored the P0363 code, it is often preceded by a reduction of engine power, a very rough idle, or choppy acceleration. The Check Engine Lamp will be illuminated as well.

How does a mechanic diagnose the P0363 code?

All diagnostic procedures should begin with a thorough visual inspection of electrical components, such as wiring and connectors. If any are loose, corroded, faulty, open, or shorted, they should be replaced or repaired. The code should then be cleared, and the vehicle should be given a road test to see if the code is stored again. Often, recreating the failure and storage of the code is a good way to be sure of the exact issue. If the P0363 code returns, the mechanic will move on to other possible repairs.

Common mistakes when diagnosing the P0363 code

Most of the time, the P0363 code relates directly to the ignition system components. Because of this, these parts are frequently the first things to be repaired or replaced when addressing the P0363 code. However, there are several other factors that can play a part in the misfire of a cylinder, so any repair technician should be sure to give the system a thorough diagnosis.

How serious is the P0363 code?

The P0363 code represents a serious issue for the safe operation of the vehicle. Therefore, it should be addressed immediately. A misfiring cylinder could lead to other malfunctions that could result in engine failure.

What repairs can fix the P0363 code?

After diagnosing the P0363 code by scanning with an OBD-II scanner, performing an inspection of electrical components, and clearing the code to perform a retest, a mechanic has a few potential repairs to address the issue. These may include:

After any potential repair is performed, it’s important to clear the code and retest the vehicle, to determine if the repair fixed the issue.

Need help with a P0363 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


Post a question and get free advice from our certified mechanics.


More related articles

Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...

Related questions

Q: I need to know the diagnostic procedure for dtc p0717. Want to test wires before taking out transmission

If the sensor only has two wires, it is a reluctant AC sensor. If the sensor has three wires then it is a hall effect DC sensor. A two wire sensor will produce a sine wave signal: '()(-)()(-)(_)' or steady...

Q: Check engine check battery leaking smoke

If it was leaking "antifreeze" or "coolant" on the freeway, that signifies a cooling system leak although it is also possible that your car is overheating (due to a cooling system problem like a stuck thermostat or an engine issue)...

Q: Good morning Patrick, I have a 2007 Pontiac torrent. It refuses to accelerate and when u try to give full acceleration, it starts

Your computer is trying to protest the motor by going into failure mode and limiting the throttle opening. The overheating is the cause of the problem. You need to have the cooling system checked to see if there are any...