got a new engine, i also need a new cat.
 

i just got a new engine... ive been getting the p0420 error code from my check engine light which basically means i need a new catalytic converter. Ive had the light on for about 3000 miles...Being thats its a new motor, Its been like that for about 2500 miles on this new motor. Can a clogged cat kill my engine within 3000 miles?? Im about to order a midpipe but im just wondering how much 2500 miles with a clogged cat affected my engine??

In the US the cats have 80K mile warranty..

the warranty for my entire car in VOIDED. Do you think I can still get a free cat replacement? I have 68,000 miles on the chassis of my car

Remember to Pre-Mix..it is your best friend..

What do you mean your warranty is void?

Anyway, yes you should still be able to get a new cat.. it is a federally backed emissions warranty, not Mazda's. I was able to get a new cat for free at 82k miles.. presumably because the dealer wanted the money and fudged the numbers.

New engine and bad cats? I can relate -

Suggestions? Anyone else get P0420 after an engine swap?