Jeep Grand Cherokee Check Engine Light Issue?

Check engine lights can be delt with at your local auto zone. Have them do a diagnostic:)

has the vehicle been in an accident or had any aftermarket elect component added that you know of? i agree with you, o2 sensor probably not, wiring issue more than likely. i doubt

if it's the harness, more like a short somewhere that would effect the pcm thus setting the code. Now, just have to figure

out in addition to the headlight switch being turned on, the short( I assume it's a short) is setting the code by effecting another elect part, like maybe the alternator somehow. i believe that has an internal regular (in the alt.). i wish you luck

on this one my friend, elect problems can be a nightmare as

you know and is why shops charge $100.00 hr. sometimes to

diagnose elect problems. ps: at least when you reset, the light stays off so it's not a hard code, but, that would be easier to diagnose but. probably more expensive to fix.

I have a 99 Cherokee Sport that does the same thing. My instruments also cut out from time to time. It's been doing that for a couple of years and nothings become of it. Try putting a piece of black electrical tape over the "check engine" light. You'll never see it again.

When the computer goes, weird stuff starts happening with cars. PCM = Primary Control Module = computer

sounds like you got it you could chase it down by sticking a pin in the line to hook your gage to and checking for the short but on a 96 i wouldnt bother

thats funny...because i had the same problem. i don't know how much i spent trying to get it fixed, before i took it to a garage and told them to just take the bulb out.

really,my friend, self diagnosis is not the way. you need to get a reader and hook it up and see,for sure... then you can repair the problem.until you do,it will be just guessing...

Check your fuses.

ur fuses are crossed