ISC low voltage to ecm fault (oil pressure)
I have a 1999 DSDP with the Cummins ISC engine.
The dash gauge reads a steady 55 Psig when the engine is running, so the original sender was changed out to the binary switch sender. I am getting a check engine light and the fault code is saying low oil pressure voltage to the ecm. Are there two different pressure sensors on the engine? One for the gauge and one for the ECM? If so, are they both located on the passenger side above the starter? If there are two does anyone have the part number for the pressure sensor that feeds the ECM?
Any help would be appreciated.