injen2nr

the previous owner of my 03 GT cut 2 cats off and gutted the other 2 and install 2 flowmaster 40's......1 week after i got it, the check engine light came on.....i hooked it to the tester and it said O2 Sencers.....i have 4 of them...(sure u already know)....withe the setup i have, if i replace the sencers, will it fix my problem?.....or do i need nwe cats?....please help

Frostbitten

The light is coming on because they removed the cats. The o2 sensors are probably still good. You will need to buy a pair of MIL eliminators and plug them into the rear o2 sensors. Either that or replace your midpipe with one that has working cats. The light does not affect engine performance, but MILs are pretty cheap

injen2nr

ok man thanks alot....ill give that a try