Cummins ISC CM2150 (2007-09) Fault Code: 2273 PID: 411 SPN: 411 FMI: 3 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal or Shorted to High 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)An open return circuit in the engine harness, connectors, or sensor 2)A signal wire shorted to sensor supply or battery voltage 3)A damaged EGR differential pressure sensor.
Possible repairs:
1)Replace the EGR valve delta pressure sensor. 2)Repair or replace the engine harness. 3)Replace the ECM.