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Engine code P0303

  

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I have a 2014 Mercedes Benz C250 with 70k miles. It is used and I bought from a dealership. When I am checking the spark plugs, cylinder number 1 is full of oil. But the engine code says there is a misfire in cylinder 3, so I checked the ignition coil and it appears to be damaged, so I tried swapping it with another coil to see if the code goes to cylinder where I put the damaged coil, but the code still remains in cylinder 3. My question is what can I do to see what the problem is and if I should change all the ignition coils and spark plugs to see if the misfire is fixed... Thanks for the help


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don't forget to check the frequently asked question (faq)


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