My tahoe hybrid 2008 check engine light is on, the code is P0430. I replaced the passenger side cat. and the 2 sensors and reset the error code, after 2 days the light is on again with the same error code, what the problem might be?

 

Possibly an exhaust leak or the cat is no longer good.

 

Where did you buy the cat? What brand? How many miles on truck now and when it was replaced?

 

It is the same brand as the original one, it is 48000 mi, the cat was replaced about 10 days ago.

About the leak they checked and there is nothing wrong.

 

The catalytic converter is covered under a federally mandated 8 year 80,000 mile warranty.

 

I already replaced it with a cost about $700, but the check engine come back with the same code P0430

 

I had a the same problem with my suburban. I ended up bringing it to Chevy so they could put the computer on in and allow the truck to learn about itself again.

 

The original cat would have been replaced at the dealer for no charge.