Alrighty, I have used the search function and I have tried to do my own research to solve this, including working on the car today. It is a 2005 Z51 MN6 car. Has longtubes, off road mid-pipe, corsa exhaust, vararam. To start with, here are the codes :

P0030
P0036
P0050
P0056

P0135
P0141
P0155
P0161

P0449
P0801

I wish I had bought the car bone stock so I knew how everything was done but ya live and learn I guess. The first 8 listed relate to O2 heater circuit and something else about the O2 circuit. P0449 was for evap control system intermittent and the P0801 for the reverse inhibit control solenoid. My car has no rear O2's, no cats, plugs for the rears are just sitting there doing nothing. The extensions for the front 2 sensors were partly melted but it was just the wire loom from what I could tell, but I might be wrong, didn't dive into it enough because of time constraints. The reverse inhibit solenoid plug was plugged in backwards (99% sure it was the right one), flipped it around but code still came back on. And as for the evap system I have no idea, have something to do with my longtubes? Or am I thinking of EGR.... This problem is kinda frustrating me, car is running fine from what I can tell but I hate to drive around with the light on and hope everything is okay. I also turned COT off with my predator because I guess thats the only way to remove the rear O2's from the computer in a way? Do I just need to find someone with some O2 sims? Someone help me out please! Thanks in advance

 

Anybody? I'm going to take another look at it tonight after work, I'm thinking the extensions are melted more than I think, gunna pull them out and see if I need to replace them. So now I'm not QUITE as worried about that but the reverse deal and the evap is still stumping me....

 

i am not a mechanic nor have i slept at a holiday inn but the extensions seem to be the culprit. The other codes???

 

I currently do not have my code list in front of me, but you definitly need to turn off the rear O2 sensors and repair the harness to the front ones.
Your Diablosport Predator for the 2005 C6 does not give you the option of turning off the rear O2 sensors. You will have to email Mike (at Diablosport) your current tune and have him do it for you. You can then install that and start clearing some of these codes.

Did all these codes just suddenly appear?
Was this car ever tuned in the first place, or did it have all these codes when you bought it?

 

P0449 evap vent control circuit intermittent
P0801 is for the reverse lockout solenoid for which the plug was backwards which I corrected but I guess that might have done some damage to the solenoid? Car goes into reverse fine....so I'm confused?

 

Ahhh okay, good to know on the diablosport deal, thanks. Gunna order new 02 extensions. When I bought the car all the codes were on except the evap. Honestly I drove a long way to get the car, drove it, he explained why the CEL was on as being because it was missing the rear o2 sensors because of the exhaust, and the car was super-clean all around so I decided to buy it and deal with it later. I've barely driven the car, but someone raised the point that if it was something other than missing the rear o2's that it could be throwing the tune way off and that I was stupid for driving it like that. It had a custom tune in the predator, but god only knows who did it....live and learn....like I said I'm buying my next vette stock so I can use the parts I really want and know it wasn't half-assed. I just didn't do enough research to make the correct decision with this one, but I'm still happy, have only put a few hundred miles on it since I've had it as I hadn't had time to look at this much.