got a P2084 code the past to days does it after i start the truck and get driving for a min or 2 clear it and it doesnt come back on the rest of my 15min drive home/ to work....it says it exhaust gas temp sensor circuit range/performance bank 1 sensor 2 any help/ input with be helpful...truck is also tunned with the old 250hp tune remade to V2 by mick at spartan