check engine light on

[stratsmith]

I had the codes checked but forgot to write them down?!
Two of them: 1st is a random misfire code; but plugs and wires are less than 1 year old? Autozone said it could be the coils?
2nd: Faulty tr switch/ Transmission tr switch
The od light blinks on and off until you turn it on and off then it's ok??
Both of these come and go. 1 day on 2 days off etc.
Any suggestions before I go to the neighborhood over -priced garage and/or dealer?

 

[P-Funk!]

Replace the coils first. Continuing to drive with a mis-fire will ruin the cat$. Very easy job.

Replace the tranny switch. You can probably do it yourself.

 

[stratsmith]

Thanks for all your help!
Just to be an idiot I'm guessing it would NOT be wise to replace 1 coil at a time and see if it goes away rather than all 4??

 

[beh]

Depends on mileage in my opinion, if you think it failed prematurely. I'd be inclined to replace em both for the peace of mind.

 

[slavrenz]

Thanks for all your help!
Just to be an idiot I'm guessing it would NOT be wise to replace 1 coil at a time and see if it goes away rather than all 4??

First of all, there are only 2 ignition coils - each one feeds 2 cylinders. And when I replaced my first one that went out, the second one went out 100 miles later and ruined my brand new catalytic converter.

Lesson: replace them both.

 

[stratsmith]

Thanks again for all the suggestions I will replace them BOTH eventhough the dork at autozone said 4. I did question were the other two were but figured wth.

 

[P-Funk!]

and replace the wires while at it.