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Cummins ISX CM870 (2003-06) Fault Code: 2274 PID: P411 SPN: 411 FMI: 4/4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
The EGR differential pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active. Before troubleshooting Fault Code 2274, check for multiple faults.
Possible causes:
1)Signal circuit open in the engine harness, connectors, or sensor2)Supply circuit open or shorted to ground3)Leaks in the sensor EGR differential pressure tubes4)Sensor shorted to ground.
Possible repairs:
1)Repair the exhaust leaks at the pressure tubes.2)Replace the EGR differential pressure sensor.3)Repair the damaged harness, connector, or pins.4)Replace the ECM.
Cummins ISX CM870 (2003-06) Fault Code: 2273 PID: P411 SPN: 411 FMI: 3/3 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the EGR differential pressure sensor circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2272 PID: P27 SPN: 27 FMI: 4/4 Exhaust Gas Recirculation (EGR) Valve Position Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR valve position sensor circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2271 PID: P27 SPN: 27 FMI: 3/3 EGR Valve Position Sensor Circuit – Shorted High. High signal voltage detected at EGR valve position sensor circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2215 PID: P094 SPN: 94 FMI: 1/18 Fuel Pump Delivery Pressure – Data Valid But Below Normal Operating Range – Moderately Severe Level. Low fuel pressure has been detected by the ECM.
Cummins ISX CM870 (2003-06) Fault Code: 1943 PID: SPN: 3555 FMI: 1/17 Ambient Air Density – Data Valid But Below Normal Operational Range – Least Severe Level. Engine torque has been reduced because the vehicle was operating at a high altitude condition.
Cummins ISX CM870 (2003-06) Fault Code: 1228 PID: P27 SPN: P27 FMI: 2/2 EGR valve position sensor circuit – data erratic, intermittent, or incorrect.