About a month ago I got check engine light which came up with P1320 - Ignition Signal and P0304 - Cylinder 4 Misfired Detected. So I end up replacing the cyclinder 4 ignition coil. About a week ago the light came back but this time is just P1320. Should I have just replace all 6 coils with the updated ones? I didn't do that at first because it said I only have cyclinder 4 misfire.

 

ya thats the signal where it tells you to replace all the coils with updated ones.

 

erase it and see if it comes back. I had the same issue and replaced 2 of them that were throwing misfire codes and bought an extra for each bank in case another goes but its been almost 2 years and still none have failed beyond the original 2

 

So you guys suggest I should just replace all six? I just want to make sure before buying it.

 

See the thread in my sig, I am a firm beliver in replacing only what you need to. I replaced only 2 over a year ago and not had one problem since.

Fat

 

yes, test them out before you replace all of them. I haven't had any experience with a p1320, but is that code a ignition coil code for sure, or could it be a problem with the signal from the crank/cam sensor?

 

I Have seen soooo many of these codes at the dealership replace all six and be done or you can do ujm 1 at a time for the next year.....