Originally Posted By: Seventh
Originally Posted By: michaelluscher
Looks like a textbook bad cat
Look how the sweep of B1S1 (upstream of converter) is matched by B1S2 (after converter)
This is showing that the convertor isn't doing it's job
Either replace the post cat sensor, and put a spacer on it, or prepare to buy a new converter
Have you been driving around with a misfire?
OTOH, at 262k, it just may be worn out and done with
+1 to all this
If they don't do tailpipe emissions testing on your car where you live I'd put a spacer in there and cross your fingers. Aftermarket cats are garbs and factory ones are expensive.
Looks like rockauto sells an Eastern Catalytic for about $257. Has a 5 year/50k warranty. Not as good as factory which is typically an 8/80k, but with that kind of mileage, I'm not sure how much more he was expecting. It might even be time to call it quits as that car is probably only worth 1-2k.