Cummins ISC CM2150 (2007-09) Fault Code: 122 PID: 102 SPN: 102 FMI: 3 Intake Manifold 1 Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the intake manifold pressure 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 intake manifold 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 122, check for multiple faults.

Possible causes:

1)Open return circuit in the engine harness, connectors, or sensor
2)Signal wire shorted to sensor supply or battery voltage.

Possible repairs:

1)Replace the intake manifold pressure sensor.
2)The removal and installation of the connector may correct the problem.
3)Replace the ECM.
4)Repair or replace the engine harness.

Categories Cumminz, DTC TRUCKS, ISC CM2150 (2007-09) Tags 1, 2007-09, Above, at, Circuit, Circuit., CM2150, Code122, Cummins, Detected, Fault, FMI3, High, Intake, ISC, Manifold, Normal, or, PID102, Pressure, Sensor, Shorted, signal, Source, SPN102, the, to, Voltage

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