dt longtube headers and check enine light

after installing dtlong tube headers, urd y pipe and 02 simulator my check engine light and traction control lightcame on i just put them on and im beat so i really didnt do much troubleshooting yet. i was just wondering if anyone had the same problem with the same set up? i was thinking its because the simulator was set up for a stock truck with the only mod being the headers and my intake might be trowing it off. or it might be a simple leak or weak conection with the sim and the ecu. any advise would be helpfull especially if you have the same headers as me

 

look over your wires again with the sim. I forgot to do one and my truck was idling at 2500 rpm with the light on.

Then I sodered (sp?) it up and it was all gravy.