I wish you where the tech working on this car! I just got a call that they will reset it and have me put on 100-600 miles to see if the light comes on again! Seems to me if the light is on there is a problem. Can a cat cov. going out do any harm on other engine parts?
thanks you guys for all the help!
If the light goes on, there are two obvious causes...
1. The cat is bad, the sensor is good, and so it is reporting accurately that the cat is bad.
2. The cat is good, the sensor is bad, and so it is reporting erroneously that the cat is bad.
If it's case 1, then the problems are most likely to be emission related. Your car will stink or over-pollute. I would not expect your pistons to fall out. Even if they did, then they are covered by the 100,000 mile engine and powertrain warranty.
If it's case 2, then you have nothing at all to worry about mechanically. You have a sensor going off and giving you annoying bad advice, that's all.
So I think in either case you are okay in terms of not blowing up your engine, but of course you want to find out if the problem is the cat or the sensor and get it fixed so the annoying light goes away.