A few weeks ago the check engine light came on in my Subaru. I had just dropped about $900 on it at the shop two weeks earlier getting a rusted out exhaust replaced and a number of other things done to it, so I wasn't all that happy when it came on. Got it scanned at Autozoo recently and it showed a P0420 - exhaust catalyst efficiency below threshold. Damn, my cat went bad...time to spend another $900
So since my car is an '02 and has under 80,000 miles, I decided to go check if there was any warranty left on the emissions system. While the car was manufactured in August 2001, it was sold in April of 2002, 4/24/02 to be exact. I had about 20 days and less than 3,000 miles left on the warranty! Needless to say I've got it scheduled at the local dealer for Tuesday
I've read around and found out that it could be a faulty front oxygen sensor, but that shouldn't be a big deal it's bad because they're a lot less expensive than a new cat.