Cummins ISB6.7 CM2350 (2013-17) Fault Code: 295 PID: 108 SPN: 108 FMI: 2 Barometric Pressure- Data Erratic, Intermittent, or Incorrect

Cummins ISB6.7 CM2350 (2013-17) Fault Code: 295 PID: 108 SPN: 108 FMI: 2 Barometric Pressure- Data Erratic, Intermittent, or Incorrect

Circuit Description
The combination turbocharger compressor intake pressure/temperature sensor is used to measure ambient air pressure. The pressure measuring portion of the sensor responds to pressure changes in the atmospheric pressure, which occur based on elevation at which the engine is presently operating. The turbocharger compressor intake pressure sensor has a 5 volt supply circuit, a pressure sensor signal voltage, and a return circuit. The ECM will detect a low signal voltage when the vehicle is operating at high altitudes. The ECM will detect a high signal voltage when the vehicle is operating at sea level altitudes.

Component Location
The combination turbocharger compressor intake pressure/temperature sensor is located in the original equipment manufacturer (OEM) intake air plumbing.

Conditions for Running the Diagnostics
1)The first part of the diagnostic runs continuously while the keyswitch is in the ON posistion or the engine is running.
2)The second part of the diagnostic runs at key OFF.

Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the barometric pressure reading was higher or lower than the other absolute pressure sensors on the engine, or an in-range malfunction of the sensor was detected.

Action Taken When the Fault Code is Active
1)The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2)A default value for the barometric pressure reading is used.
3)Exhaust Gas Recirculation (EGR) valve operation will be disabled.
4)Diesel exhaust fluid injection into the aftertreatment system is disabled.
5)Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.

Conditions for Clearing the Fault Code
1)To validate the repair, start the engine, let it idle for 1 minute, and then shutdown the engine.
2)The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
3)For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
4)The Reset All Faults command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Possible causes:
1) A malfunctioning turbocharger compressor intake pressure/temperature sensor