So a few days ago, I had my check engine light come on, one was for Cylinder 2 misfire (P0302) and Knock sensor (P0327). I had my car sitting for the last 2 days and went to start it, both codes were gone so I took it for a drive and it seemed to be running fine, no misfire at idle or anything. Spark plugs were done just about 15k miles ago so I figured the misfire was most likely a coilpack or injector. Why would both codes go away? Anyone else have this issue or have an idea of what it might be? Still going to replace the coilpack and knock sensor and harness to be safe.

 

I wouldnt worry about it if it doesnt come back. U probably had some bad gas or something.

 

The ECM will clear codes that resolve themselves.

 

Decided to check just for reassurance and say hello to the broken spark plug that would have blew my engine up lol. Going to just do all new plugs, coil packs, do the sensor/harness that was going out, new gaskets for the plenum and injector o rings

 

Hey nice find. Sometimes following your gut pays off

 

Thanks! Definitely does!

 

Good work! Was the broken plug #2?

 

Yes it was #2, surprised because not many miles on these plugs!

 

Was that even a plat or irridium plug? I'm curious to know what brand it was as well?

 

OEM NGK platinum plugs, seen some other people have issues with these plugs but on different cars. Bought them again, I’ll probably just replace plugs every 25k from now on to be safe.