Cummins ISC CM2150 (2007-09) Fault Code: 297 PID: 443 SPN: 1388 FMI: 3 Auxiliary Pressure Sensor Input 1 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at the OEM 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.
Possible causes:

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

Possible repairs:

1)Replace the OEM pressure sensor.
2)Replace the ECM.

Cummins ISC CM2150 (2007-09) Fault Code: 296 PID: 223 SPN: 1388 FMI: 14 Auxiliary Pressure Sensor Input 1 - Special Instructions

Cummins ISC CM2150 (2007-09) Fault Code: 295 PID: 108 SPN: 108 FMI: 2 Barometric Pressure - Data Erratic, Intermittent, or Incorrect. The ambient air pressure sensor is reading an erratic value at initial key-on.

Cummins ISC CM2150 (2007-09) Fault Code: 294 PID: 441 SPN: 441 FMI: 4 Auxiliary Temperature Sensor Input 1 Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at OEM auxiliary temperature circuit.

Cummins ISC CM2150 (2007-09) Fault Code: 293 PID: 441 SPN: 441 FMI: 3 Auxiliary Temperature Sensor Input 1 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the OEM auxiliary temperature circuit.

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