Cummins ISC CM2150 (2007-09) Fault Code: 2274 PID: 411 SPN: 411 FMI: 4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
Possible causes:
1)A signal circuit open or shorted to ground in the engine harness or sensor 2)A supply wire open or shorted to ground 3)A malfunctioning EGR differential pressure sensor.
Possible repairs:
1)Replace the ECM. 2)Replace the EGR valve delta pressure sensor. 3)Replace the engine harness. Refer to Procedure 019-043 (Engine Wiring Harness) in Section 19. 4)Repair the OEM harness