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-   -   Catalytic Confusion?? (

ejk78 11-28-2011 03:30 PM

Catalytic Confusion??
Hey guys,
I have an '04 with a few mods,(K&N CAI, Dal exhaust, and long headers). Recently i bought the Superchips Cortex Tuner and uploaded the 87 octane tune, soon after i got the P0420 code for the Catalytic effiecency Bank 1. i only have 68,000 miles on the truck so i wold be suprised if the CATS were bad. Also ive seen pics of the cat converter and it looks nothing like what i have, i have 2 seperate cats(i think).

Would the CATS go bad that fast and have to be replaced? If its the sensors, how do u know which one to replace?:4-dontknow:


05ram 11-28-2011 04:51 PM

Sounds like o2's, not sure?

XC450 11-29-2011 01:42 AM


Originally Posted by 05ram (Post 663115)
Sounds like o2's, not sure? sounds like an O2 sensor. We need the advise of an experienced tuner that knows which bank is which location.

CdnoilRAM 11-29-2011 02:35 PM

Get a set of new O2 sensors and try them before you go through a set of new cats.

ejk78 11-29-2011 06:45 PM

with the O2 sensors, would they be before the CAT or after? Or r u guys suggesting replaceing all 4 sensors?

ORT 11-29-2011 07:07 PM

It is the sensor after the cat on the driver's side. I had this same code before when I installed LT's and high flow cats.

ejk78 11-29-2011 08:39 PM

thanks man, il try that....:smileup::smileup::smileup:

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