Q: Rough idle. P0304 and P0353 codes.

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The car started running rough and the check engine light went on. I checked with scanner and got P0304 Misfire Detected in #4 Cylinder and P0353 Ignition Coil C Primary/Secondary Circuit Malfunction. Are these codes telling me that I have issue with both cylinders 3 and 4?

Thanks in Advance

My car has 188000 miles.
My car has an automatic transmission.

Hi Steve. Thanks for contacting us today. In most cases, these two codes (one from cylinder 3 and 4) are caused by a failed ignition coil or a faulty electrical connection. The first thing I’d do is double check your electrical connections to each cylinder. If that checks out ok, then you should probably have a professional mechanic complete a misfiring inspection to determine what is causing this issue so the right repairs can be completed.

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