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Cummins ISB6.7 CM2150 (2007-09) Fault Code: 1876 PID: SPN: 3245 FMI: 3 Aftertreatment Exhaust Gas Temperature 3 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the aftertreatment diesel particulate filter outlet temperature sensor circuit.

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.

The aftertreatment diesel particulate filter outlet temperature sensor shares return wires in the OEM harness with other sensors. A shorted return can cause multiple fault codes to be active.

Possible causes:

1)Open return circuit in the harness, connectors or sensor
2)Open signal circuit or shorted to a voltage source.

Possible repairs:

1)Replace the aftertreatment diesel particulate filter outlet temperature sensor.
2)The removal and installation of the connector may correct the fault.
3)Replace the OEM harness.
4)Replace the aftertreatment harness.
5)Replace all interconnects.
6)Replace the ECM.

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