Questions & Answers for: Pontiac Grand Prix p0303 code

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...code we keep coming up with is P0303. We have: Replaced the injector Replaced the O2 sensor Replaced the intake gaskets Replaced the computer Replaced the Coil Pack & module Replaced the MAP ...

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...code "P0303" is stating that the Third Cylinder or Cylinder number 3 Is mis-firing, thanks to all that you have done this has narrowed it down to two "confirmed" possible problems; The first is that ...

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...code comes up as P0303, piston misfire. However, the engine runs fine with the supercharger belt off and doesn't generate an error or check engine light. Could this be an issue with the wastegate ...

Question about 2006 Grand Prix

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...code P0303, changed spark plugs, wires, and fuel injector. Car still shakes and check enigine light is still on. Acceleration is fine. Spark plugs,wires and injectors, have nothing to do with your ...

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