check engine light

[ChefJ]

My check engine light comes on every time I drive the car but doesn't come on for about four minutes after the engine is turned on. No trouble with anything and it doesn't seem to be affecting anything. The car runs fine all of the time. It is a 1992 mtx sho and only has about 90000 on it.

 

[platoribs]

O2 sensors behind the Cats may cause the CEL, the computer will go to default so it'll run ok. Someone here will offer other suggestions and possibly tell you how to check the O2's

 

[AutoSHO]

Go to http://www.midwestsho.com/catalog/troubleshooting.php?codes=instructions

Post the codes you get here. We'll tell you what to do.