What causes the check engine light to come on a 1998 s-10 pickup?

quite a number of faults can cause the check engine light to come on. You'll need to borrow, rent or buy a code scanner to find out what the computer has detected.

Autozone, Checker Auto Parts, Schucks Auto Parts, Kragen Auto Parts, O'Reilly Auto Parts or any of the Murray Discount Auto Parts stores will connect a scanner to your OBD recepticle under the dash for free and read out the code you need.. they will also reset the computer, but the code will return if you don't repair the defected item..