My check engine light came on the other day and p0236 and 0237 codes came up after I started the engine with the programmer harness plugged into the map sensor and data port but the programmer itself was not in the truck. The xzt harness goes in between the map sensor and stock harness. I had the codes cleared and 0237 never came back but 0236 will come back after 5 mins of driving with the xzt hooked up. I can remove the xzt harness and hook the factory connections back up and the code will never come back after clearing. I'm thinking the xzt is messed up or is this normal?

 

Bad xzt+