Skip the auto shop - Our mechanics make house calls

Q: Cylinder 3 is misfiring

asked by on

I am getting a Check Engine code P0303, which is a misfire on cylinder 3. I am not exactly sure whether the cylinder needs cleaning or replacing, or if it is just a spark plug.

A: Misfire on cylinder 3 usually mean you have...

Misfire on cylinder 3 usually mean you have a bad spark plug or spark plug wire. If you haven't had a tune up in a while I would recommend having a technician, such as one from YourMechanic, come out and replace your spark plugs, wires, and air filter and see if that helps. I would also have them replace the fuel filter as well since a misfire may be caused by the fuel system as well.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Having problems with battery and 12V socket

I would recommend having your battery checked. Lots of weird things can happen when batteries and alternators start failing. The battery test will check for proper voltage or charge of the battery as well as a check for the proper...

Q: Turbocharger leaking oil

If the turbocharger is leaking oil and making smoke out of the exhaust, the turbo will need to be rebuilt or replaced, because the seal that has gone bad is internal to the turbocharger. If it is leaking oil outside...

Q: What does the anti-lock braking system (ABS) Warning Light mean?

The anti-lock braking system (ABS) Warning Light is located on the instrument panel. When this light illuminates, then the vehicle has detected a problem with the ABS system, and as a result, the ABS system is turned off. Since the...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...