Oops I misread my manual, shakin is correct those are all downstream o2 codes. I would start with some premade o2 extenders and make sure you have the correct cat monitors installed downstream. your CEL will still come on but it sould only have p0420 p0430 codes. you can set the CEL to off with a tuner.

 

I did not say, that gentleman recommended it because of the location change from where the o2's would normally be. I have seen posts like his is other forums as well which leads me to believe the might be some truth to the matter. The original poster posted with limited information I was just trying to cover all the bases I could think of. In closing if you went through all that has to be done to install LT's you would want to have the car dyno tuned to get the most out of them. Which is why you had them installed instead of shortys (which is what I have been looking at the JBA 1625S-7JT when the time comes or the price is right).

 

Ok, I just baught a canned tune from AM for my SCT for the time being and now I only have the P0141 and P0161 codes... The shop stripped one of the o2 sensors(rear driver side) while trying to take it out of the stock midpipe and replaced it with a different one, idk what kind. LMPerformance sent me only 2 sensor extendors, which I beleive I should have 4 right? The 2 they sent me were the wrong ones, my Dad was there when they modified the sensor to fit my plugin that goes to my cars computer. Only the 2 modified sensors are plugged in and they are plugged into the front. When they send me the right ones and I plug them in it should work I hope. If not its getting dyno tuned and I will have them take a stab at it and if all else fails I will have them turn off the sensors. Car sounds amazing btw (besides the flows). It rumbles on startup now and pounds your chest during warm up, I love it. I dont regret it all, just make sure you have some money when you do it lol. Thanks for your help guys I appreciate it!