SES light

got a 88 camaro w/a 350 TBI, it ran like crap and wouldn't idle so I got a code from the computer that said the O2 sensor was reading rich. I changed the O2 sensor and now it runs great, but the SES light still comes on, and says the O2 is reading lean. I reset the computer to wipe out any codes from the previous sensor but the light still comes on. Any ideas?

black tape does wonders! lol

Theres this one guy named Josh Jerrel thats an automotive genious. If you cant find it out you could take it to him. I hear hes an expert on camaros. But id try changing to O2 sensor thats what helped on mine.