Skip the auto shop - Our mechanics make house calls

Q: Possible causes of P0303 code 2009 Dodge Journey

asked by on

i had a P0303 code on this car. I replaced the plugs and it ran great for 2 days. then, the check engine light came on and it began to skip or miss. i turned off the engine and started it again and the check engine light went off and the car ran smoothly again. the next day, i started the car and the check engine light came on again and the car ran rough again. Can you tell me if this is likely the coil that needs to be replaced, or if there is some other issue.

My car has 126500 miles.
My car has an automatic transmission.

Hi there - misfires can be caused by worn spark plugs, failing coils, or injectors dumping too much (or no) fuel into a cylinder, causing a misfire. Yes, this could be a failing coil. Swap the cylinder #3 coil with another coil and see if the symptom moves. If so - then yes, that coil is bad. Remember all the other coils are the same age and condition, so if replacing one, seriously consider replacing them all - not that expensive. For further diagnostic help, I recommend a misfire inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My Toyota windom is not starting.

Hi there. Check the battery cables to see if they are are tight and clean. If the cables are loose or corroded, then clean them and tighten them up. If the cables are fine, then check the battery voltage and...

Q: 2011 Chevy Aveo has no spark at cylinders 2 and 3

The coils on your vehicle are all housed together in a carrier assembly. If two of the four coils aren't producing spark, there's a good chance the carrier is to blame. A professional, such as one from YourMechanic, can repair...

Q: Turning and braking causes grinding noise

Sounds like your brake pads might be low. The brake pad has a semi-metallic friction pad that makes contact with the rotor. When this pad wears out, the metal backing plate that it is attached to makes contact with the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...