P0303 Code: What It Is And How To Fix It

P0303 Code: What It Is And How To Fix It p0303 What the P0303 code means The P0303 DTC is set when the ECU detects multiple misfires from cylinder 3 Misfires cause the ECU to set the Check Engine Light and p0303 P0303 reads “Misfire Detected in Cylinder 3” That means any vehicle housing three cylinders or more can fall victim to this code

p0303 Car vibrates and stalls when put on drive mode Thought it was a simple fix; replaced all 4 spark plugs with brand new NGK-97506 still P0303

p0303 Lots of things can cause a P0303 If nothing seems obvious and there's no power loss, check the injector insulator, clear the code and see if it resets  The P0303 code indicates a misfire in cylinder 3 of the engine A misfire occurs when the fuel and air mixture fails to ignite correctly,