[KCMike]

Sounds like he wasn't very sure of what he was doing. If he had a Scan Tool it would give a specific code, no matter how "far gone" the problem. you may have gone to the wrong place. However I would be more concerned with the oil light. This is a seperate warning system, won't show a code, and will cause sever damage. Good Luck. Don't drive anymore with the oil light on until you know why and correct it.