Code P0303
#1
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Thread Starter
Code P0303
Hey guys,
My car threw a p0303 today. I was driving it pretty hard. Parked it, all good. Then I came out about 30 min later to go to the store. Turned my car and drove for about a min and my cars ses light came on... p0303... Cylinder 3 misfire. What would cause this? After I erased the code it didnt come back but I only drove a few miles and drove it easy.
A google search didnt really didnt give any results/answers.
Thanks for the help in advance!
My car threw a p0303 today. I was driving it pretty hard. Parked it, all good. Then I came out about 30 min later to go to the store. Turned my car and drove for about a min and my cars ses light came on... p0303... Cylinder 3 misfire. What would cause this? After I erased the code it didnt come back but I only drove a few miles and drove it easy.
A google search didnt really didnt give any results/answers.
Thanks for the help in advance!
#4
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Join Date: Jun 2008
Location: New Jersey
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Check the conditions of your plugs. If the plugs seem OK or you have replaced them mark the Coil and swap it to a different cylinder.
Drive and if the different cylinder now comes up with the Misfire it's probably a bad coil.
If the misfire still occurs with cylinder 3 with new plugs then a faulty fuel injector could be at fault.
Start there and let us know.
Drive and if the different cylinder now comes up with the Misfire it's probably a bad coil.
If the misfire still occurs with cylinder 3 with new plugs then a faulty fuel injector could be at fault.
Start there and let us know.
#5
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Join Date: Jul 2014
Location: maine/cali
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same issue and i swapped my cyl#1 coil to a different location like technic stated and it followed. So i bought a new coil and the misfire came back a week later. I was convinced it wasnt the coil causing this but i broke down and upgraded the stock coil and havent has an issue for 3 months now. If it does follow when u swap coil there is someone selling stock coils for 100$ for 5 under the FS.
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