silverone

ok so i bought 2 o2 sims from casper electronics to replace the 2 rear sensors on my new header and "y" pipe. i had the cel cleared and it stayed off for about three days then came back on. now originally i got 2 codes p0420,p0430. which are the 2 o2 sensors post cat bank 1 and bank 2. now i only get p0430 which is the post cat sensor bank 2. has anyone else ran into this and why is it only the one? i know a lot of you have put on headers so i'm hoping you can help! thanks!

Vette Boy

I had this happen on my Impala SS with headers and Casper O2 sims. One of the O2 sims went bad. I figured it out by swapping the sims and seeing the CEL code switch banks. Casper sent me two new ones, just in case.

silverone

cool i'll try that today and see if the code changes, thanks!

mikal

I believe i have one of these on mine
http://www.o2simulator.com/24803.html

Lexbox

I wonder if mine has a LED light too. It didnt look like it when I was checking it out.

Hollywood

I have heard of the sims being very flaky and that they have a tendency to fail.

There is another way. Install spark plug anti fowlers in your y pipe then plug in the o2s into those. What that does is makes the sensor probe go not as far into the pipe which emulates cat temperatures. It's popular with imports.