In autoshop today I put a brand new Duralast serpentine belt on my XJ. I drove to the hardware store, then went home and noticed that my check engine light was on. I looked under the hood and didn't see anything wrong or out of place. What do you think is the probable cause of this issue?

 

uhhh... why dont you find out what code its throwing?
Do it all the time with my girlfriends 96.

turn key to off (not LOCK, I mean off). Go like this: on, off, on, off, on, off, on, and watch your CEL. It will start blinking. You will have a series of blinks with a short pause, and then another series of blinks. (this is your code) A long pause (end of your code) and then more blinks (next code, if there is one). 55 is "end of codes"

Not my video, only works for 91-96, and you dont have to set teh ebrake.
http://www.youtube.com/watch?v=http:...?v=eHe-3UU8W6E
did you unplug the battery when you did this?

 

What's the code?

 

Most of your autopart stores have an obd II tool that will tell you why your check engine light is on. Just have them test it.

 

You know who made that video right? I'm not BSing you, that was me haha last november i think? I did it in my 92 laredo. I really didnt think i could do the key trick in my 96 though.

 

nice...
I commented on it.

You can do it on 96, I do it on my girlfriends all the time.

find out what the code is and post it on here.

 

haha nice! alright i'll check into the problem in the morning thank you for the advice i really needed it because my dummy light popped on again today.