Engine/Transmission (1998.5 - 2002) How do I reset check engine light on a 99'???

[MRose]

Pulled my comp box off without disconnecting the harness for a update and the check engine light came on. I disconnected the batterys for 30min and its still on. I know that there was a model change concerning codes, does this mean I need a scanner to turn it off?

 

[csutton7]

if disconnecting the batteries doesn't do it then you will need a scanner as far as I know--chris

 

[KBalzuweit]

You need a scanner. Tried the battery yhing on my 99, nothing. Go to autozone they will pull the codes and then reset for free.

 

[TSRAM]

The code will clear on it's own after a few start-run-off cycles. Give it a day or two.

 

[KBalzuweit]

Mine did not. Had bad cps, replaced it, light stayed. Used a scanner, never saw it again.

 

[MRose]

My buddy was still at work so I used his scanner. Just had a map sensor code from disconnecting the harness, just like the instuctions warned! Wow, figure that one out genius! But if still ran is what I needed to know, and it did. Thanks guys!

 

[csutton7]

my light has been on for years now--sometimes it goes out for an hour, but then comes back on--our trucks aren't programmed like later ones, where the light will go out after a few on's and off's with the key--sometimes doing the battery trick will work and sometimes not---chris

 

[Cory]

If you know anyone with a SuperChip around, you can get it off that way also.

 

[JPope]

Click and Clack trick, black electrical tape over the light, and you do not see or worry about it anymore!!!

 

[Cowboy Medic]

mine would come on often when my apps was bad but it always went away after running it three or four times without having the apps go out. I finally got the apps replaced and it has stayed off ever since. never had to run codes or use a scanner or anything.