nixon

I recently had a bad coil and after i put the new one on the engine went off and the turned on again this time it said my cat was below threshold in bank one. Does anyone know what causes this problem because last year this happen and i replaced my cat. do i need to replace it again our is there something else causing this situation.

Phate

Sounds like something is ruining your cats.. but the cats being stopped up only rarely make a car not run.

blue89vert

if the cats are getting plugged extremely bad then that could happen but i doubt it. i say gut the cats

nixon

if i gut the cat would it still pass emissions because my tags are due at the end of the month

Phate

I dont know your emissions standards there, So I cant tell you for sure. But if you throw a code from the o2 sensor, I doubt you'll pass. There is a 50/50 chance.