What does error code P0302 for the check engine light mean?

Answer 1

P0302 means number two cylinder has a misfire, due to possibly a spark plug, spark plug wire, ignition coil, fuel injector or something mechanical in the engine like a bad valve, valve spring or piston ring etc. For future reference OBD II codes are listed at DenLorsTools.com Tech articles under OBD II codes and scan tools.

== == P0302 is a Cylinder Number 2 Misfire. Start at the front of the engine, where all the accessories are mounted(alternator, Power Steering pump, etc) then count each each spark plug from left to right in normal order. The cylinder to the left will be 1, and the cylinder to the far right will be 4. When you locate number 2 cylinder, check the plug wire for damage. remove the spark plug and inspect it for wear. A new set of spark plugs and wires will probably fix your problem. Otherwise it may me a coil pack or ignition module. Hope this helps. It means the for some reason cylinder #2 isn't firing properly. That is usually a spark plug, plug wire, or ignition coil issue. But at times, I have found that an internal problem in the cylinder, like a valve sticking. I have also had a fuel injector cause this. Commonly too, on engines with individual EGR ports, one to each cylinder, I have had restricted EGR ports do this, in a situation where all but one was restricted. I would start with the easiest and most common fix, plugs and wires, and go from there.