^ cobb does fix the P0420 from popping due to the catless exhaust. If you keep getting that cel then you have a leak somewhere else. Check your coolant lines,fuel pump and gasket,gas cap, and all vacuum hoses.

 

Do you have a mechanical or electrical fix on the o2 sensor? the cruise light blinks whenever the CEL light comes on.

 

i put my dp on a few months ago, gave me the same prob but i got a CEL Boss thats sposed to fix it but im told i have to re-flash my ecu for it to actually work- ne advice?

 

yeah with a cel fix i got low voltage on O2 bank 2. that CEL is probably nothing.
I dont know what your setup is but with my txs stealth back with cat and the factory axle back i did not creep.

definately get a tune. it makes the car .

check out Enginuity.org and Osecuroms.org its a great way to get a tune for cheap
or Snowman

 

I need to check all my lines n stuff hmm.. I thought it was just a stupid code.. thanks for the info I'll check it right now my car did seem like it was having a burning smell even after i changed my oil and stuff

 

the other thing is, if you fix the problem and drive around normally for 2-3 days the cel will actually turn off on it's own once the ECU realizes eveyrything is working properly again. Suprised the hell out of the first time it happened, I always used to reset my ECU to clear the code but not anymore.