Yes, yet I think the Toyota algorithm to check on Catalyst Efficiency is a bit aggressive.
I have two 2002-2003 vintage Toyotas with the P0420 code right now. One has had it for the past 160K miles. The other just came on in the past few months.
The 250K+ car burns oil at startup, but the light came on 6+ years ago before it started consuming (burning and leaking). The other, no. They don't seem to be excessively rich. But maybe the kids (both 20+) are doing a lot of full throttle driving, getting into the rich portion of the ECM maps.
Frankly, since we don't have testing, I've told the kids as long as it's not flashing, they are good to go. I read the codes at every oil change to see if there are any new codes. I clear the P0420 and wait for it to return.
Originally Posted By: GSCJR
Originally Posted By: Trav
Whatever condition killed the original cat will kill the new one OE or aftermarket if it wasn't corrected.
This ^^^
Cats do not die, they get murdered.