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    Thread: P0300 random misfire.

    1. #1
      What's wrong with my car? Jaded_Crown's Avatar
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      P0300 random misfire.

      I've recently had my car serviced and it now comes up with a P0300, the service included both a timing belt and heated O2 sensor, I checked the spark plugs and they are fine. I would appreciate some help identifying the cause, thanks.



    2. #2
      2004 1.6 Auto Rust Free
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      Could be the plug wires, the coil, or oil in the spark plug tubes depending on the year.

    3. #3
      What's wrong with my car? Jaded_Crown's Avatar
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      it's a 2006 I checked plugs and tubes, haven't tested the coil yet. I had an aftermarket pod filter on the car, which I reverted to standard. idles better with original airbox, but issue still persists.



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