I have the following DTCs:

P0302 - Cylinder 2 Misfire Detected
P0304 - Cylinder 4 Misfire Detected
P0300 - Random Misfire
P1399 P - Random Misfire
P1456 - EVAP Emission Control System Leak Detected (Fuel Tank System)

I have a MY02 with 75k miles. I had the plugs replaced by the dealer for the TSB. I was thinking about replacing the spark plugs and erasing the codes to see if they come back and was hoping someone could tell me if that's a good idea. I know you're not supposed to erase the codes before having a professional look at it (I am certainly not a pro) but I thought this might be a good way to troubleshoot the issue.

Any advice would be greatly appreciated.

Thanks

 

Anyone??

 

Bring it to a professional and have them diagnose and fix your problem rather vs you randomly changing out parts and hoping to fix the problem.

 

http://www.aa1car.com/library/misfire.htm

here is something to read through so it can help diagnose the problem...

 

Last code is no biggie. I have had it but it stopped lighting up for some reason.

 

This thread might help with the misfire codes:

https://www.s2ki.com/forums/index.php?showtopic=659930

 

Great info, thanks. I'm surprised I didn't find this last one during my search.