Saturn Repair Problems? Ask a Mechanic for Answers ASAP
May I have the year, model and engine size of your Saturn?
Great, thanks. And what model is this? Ion? Aura? Outlook?
Ok. Great. And the engine size? 2.4L? 3.5L? 3.6L?
From what you are describing, and along with the p-codes, it sounds like you have a cylinder misfire on cylinder #3. There are a few different things that can cause a single-cylinder misfire. This can be a worn spark plug, a faulty ignition coil, a faulty or clogged fuel injector, low cylinder compression, etc. More common here- plug or coil. So, best palce to start is by removing the spark plug and inspecting it for any signs or wear or cracks in the body. If there are any doubts, replace all the spark plugs. If the plugs look good, inspect the electrical connector and wire harness to the ignition coil for any loose, broken or damaged wires. If this checks ok, you can swap the coil with another and check the p-codes. If P0303 is now changed to a different cylinder, replace the coil. If these check ok, the injector and cylinder compression will need to be tested. Like I say though, more than likely a coil or plug as these are common fail items. Cylinder #3 is on the side of the engine closest to the windshield, and it's the middle cylinder. If my answer has helped you, please help me and rate using the stars at the top of the page or 'accept' my answer.If you cannot rate or do not see where to rate, please let me know! Rating or accepting my answer does not cost you extra. It allows me to be credited for this Q&A.
Hi! I noticed this thread was still open and wanted to check in and see how you made out. Did you have any other questions on this issue?