Cummins ISB CM850 (2003-06) Fault Code: 2272 PID: 27 SPN: 27 FMI: 4 Exhaust Gas Recirculation (EGR) valve position circuit – voltage below normal or shorted to low source. Low signal voltage detected at the EGR valve position sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2272 PID: 27 SPN: 27 FMI: 4 Exhaust Gas Recirculation (EGR) valve position circuit – voltage below normal or shorted to low source. Low signal voltage detected at the EGR valve position sensor circuit.
The EGR valve position sensor shares SUPPLY and RETURN wires in the engine harness with other sensors. Open circuits and short circuits in the engine harness can cause multiple fault codes to be active.
Possible causes:
1)SIGNAL circuit open or shorted to ground
2)SUPPLY circuit open or shorted to ground
3)Sensor shorted to ground.
Possible repairs:
1)Replace the EGR valve assembly.
2)Repair or replace the engine harness.
3)Replace the engine control module.
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