Skip the auto shop - Our mechanics make house calls

Q: Check engine light on

asked by on

So my check engine light came on Wednesday morning when I was leaving work and I hade it checked to see with the issue is and I was given the code P0303. I was told that cylinder 3 misfired and that it something to do with my spark plug or spark plug wire. So my question is how long can I drive my car until I can get it fixed? I was going to get it fixed on Friday or Saturday. So will my car stop on me or stop starting until a couple more days? What is a general price of how much to get that replace? How long does it usually take?

My car has 166000 miles.
My car has an automatic transmission.

There area number of things that can cause a misfire such as low fuel pressure, vacuum leaks, faulty spark plugs or wires, a bad crankshaft position sensor, bad camshaft position sensor, faulty fuel injectors and many others.

The most efficient way to approach a misfire is to first check for intake leaks causing a vacuum problem which I the most common. The next step is to replace spark plugs which are also a common culprit of triggering this code. Your car may be ok to drive for a couple of days like this, however be reminded that the problem may get worse and the car will drive very poorly.

I would suggest having an expert from YourMechanic come to you home to diagnose your misfire issue. Regular tune-ups and maintenance will also often times avoid these types of problems 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

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!
  1. Home
  2. Questions
  3. Check engine light on

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do I use the intermittent wipers?

The intermittent wipers allow you to control the frequency of the windshield wipers. To use the intermittent wipers, follow these easy steps: Locate the wiper lever, which is on the right side of the steering column. Pull the wiper...

Q: Heat messes up Crankshaft Sensor Position

Hello. From your description, it sounds like you have a head gasket leaking if you are not finding an external leak. This is most likely the cause of the misfires, spark plug issues, and other problems. To pinpoint the problem,...

Q: Car dies after a few minutes

There is a high possibility that your fuel injection unit "CFI" is malfunctioning. That is a common problem on your vehicle. If you would like help with this issue, consider YourMechanic, as a certified technician will be able to visit...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.