High exhaust manifold pressure.

[Luckywon]

Update: I ran the machine myself the last couple days. When the charge pressure and exhaust pressure sig voltages run matching, the pressures run near matching and all is well. Then suddenly, maybe with a bump…the exh manifold pressure sensor sig voltage goes to 4.7 causing the code 2373. The voltage never changes much from 4.7 even though the pressure reading fluctuates. Eventually it jumps back to about 1.2 volts and light goes off sometimes for a couple hours. So, thinking the sig wire is getting unwanted voltage from another wire but not the supply wire because I checked that it has 5.03.

Was thinking of unplugging at ecm and checking for a pin that has continuity with exhaust manifold pressure signal wire.