Sep 7, 2024 · How to fix a P0303 code quickly and efficiently by addressing spark plugs, ignition coils, and more—discover the essential steps you need to take.

Learn what the P0303 diagnostic trouble code means and how to troubleshoot a misfire in cylinder 3 of your engine with AutoZone.

Aug 25, 2024 · The P0303 code means that cylinder 3 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on …

May 30, 2025 · The P0303 code indicates your 3 cylinder is misfiring. A misfire occurs when one of the cylinders inside of your engine doesn’t fire because something is off in the fuel-air-spark ratio.

In this case it's cylinder #3. A code P0303 may mean that one or more of the following has happened: If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. If there …

Oct 6, 2025 · One prevalent code is P0303, a cylinder misfire indicator. Read on to learn the most common causes of a P0303 code, how it will affect your drive, and what you need to do to fix it.

This guide explains the P0303 code’s meaning, symptoms, causes, and step-by-step diagnostics to fix it like a pro—potentially saving you $500-$800 from overpriced cylinder misfire repairs.

Oct 30, 2024 · Here's everything you need to know if your engine is showing the P0303 error code, which indicates that the engine control module has identified a misfire in cylinder 3. Here are the …

Jan 18, 2025 · What does the P0303 Cylinder-3 Misfire Detected mean? P0303 code gets triggered when the Engine Control Module detects an engine misfire on cylinder-3. Misfire means that the …

What does the P0303 code mean? The P0303 code is a diagnostic trouble code (DTC) that indicates a misfire in cylinder 3 of your engine. When the vehicle’s onboard computer detects irregularities with …