04 cummins with edge chip
 

i have an 04 dodge with an edge chip "the juice" it is setting a p0237 map sensor low i check voltage at engine harness i get 5v ok. i check votlage for sensor at edge harness i have 2.7 if i unplug the edge harness and plug the factory harness straight into the sensor the code does not come back but i get a turbo overcharge code also this chip is not performing i should get black smoke with the chip on "race" mode 4 this truck has less pwr than stock any suggestions