Hello guys.
Started the car last night, and thing was shaking like crazy, seemed like cylinder misfiring. I drove like that for about a mile, and SES started blinking. then as it got warmer, it started to work normally. I drove to Autozone, and pulled these two codes, even though the light was off.
P0302 - Cylinder 2 Misfired Detected
P1320 - Ignition Signal
Now, does ECU remember what cause last occurence of SES light?

I had them damn coils replaced once under warranty, but can't find receipt saying that. Maybe stealer didn't replace them all, just one that was not functioning correct.
Now, I would assume that bad coil causes bad MPG, is that correct, even when I am driving and it is not misfiring??

Thanks for all your help...

 

Anyone got any asnwers? Thanks

 

Likley to be the ignition coils. If one goes the rule of thumb is to do them all...however the stealership would have only done one, that is sure-fire bet. If you're still under warranty I would go and get those done...but chance are good that you are going to have to do them all at some point in time.

 

Just do the #2 coil.

Myself and many others have just changed the misfiring coil, and haven't had to change any others for a long time, but the other code might indicate otherwise, especially on 3.0

If the 1320 isn't related, just do #2

 

Another prehistoric thread lifted from the dead again!!!
I'm sure the problem has been solved by now..