A few months ago my SES light popped up, brought it to my buddy's shop and it was just a misfire code (P0300), cleared it and didn't show up again for about a month, then it went away by itself. This went on until recently when it came on again, got the code checked out to find out two more codes were present; P0303 and P2A03 (x2). Any suggestions on how to get rid of this codes or fix any root problems?

 

If you still have your factory warranty I'd take it to the dealer and have them take a look. One could be a spark plug issue, and the other could be the upstream (exhaust manifold) 02 sensor. If you have high flow cats that will probably cause an issue w/ the dealer honoring warranty though.

 

Yeah no warranty haha, I have aftermarket intakes and exhaust, pretty sure the cats are stock though (everything was installed before I bought the car). I'll probably end up taking it back to the dealer to diagnose it.

 

diagnose your misfire first. p0303 is misfire in cylinder 3. swap the coils first and see if it goes to the other cylinder. if so replace the ign coil.

 

I have a CEL code also thrown and its p0106 and I checked what it is and it said its a vacuum leak and I can't for the life of my find where its coming from and its been getting on my nerves.

 

^^^ There is a TSB out for that code. The fix is a ECU update.