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Cummins ISX11.9 CM2250 (2010-12) Fault Code: 629 PID: 314 SPN: 1176 FMI: 18 Turbocharger 1 Compressor Inlet Pressure- Data Valid But Below Normal Operating Range- Moderately Severe Level

Circuit DescriptionThe ECM calculates a differential pressure across the turbocharger using the intake manifold pressure sensor and crankcase pressure sensor.

Component LocationThe intake manifold pressure sensor is located in the air intake horn. The crankcase pressure sensor is mounted to the crankcase breather filter housing.

Conditions for Running the DiagnosticsThis diagnostic runs continuously when the engine is operating.

Conditions for Setting the Fault CodesThe calculated differential pressure across the turbocharger is greater than a threshold.

Action Taken When the Fault Code is ActiveThe ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault CodeTo validate the repair, start the engine and let it idle for 1 minute.

The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.The ECM will turn off the amber CHECK ENGINE lamp after the diagnostic runs and passes.The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults.

Shop TalkPossible causes of this fault code include:

Plugged or restricted air filter pluggedRestricted crankcase breather filter pluggedRestricted crankcase breather plumbing.

Possible Cause:1) Intake Manifold temperature/pressure sensor failure2) ECM calibration

Cummins ISX11.9 CM2250 (2010-12) Fault Code: 598 PID: 167 SPN: 167 FMI: 1 Electrical Charging System Voltage- Data Valid But Below Normal Operating Range- Most Severe Level
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 597 PID: 167 SPN: 167 FMI: 18 Electrical Charging System Voltage- Data Valid But Below Normal Operating Range- Moderately Severe Level
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 596 PID: 167 SPN: 167 FMI: 16 Electrical Charging System Voltage- Data Valid But Above Normal Operating Range- Moderately Severe Level
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 595 PID: 103 SPN: 103 FMI: 0 Turbocharger 1 Speed- Data Valid But Above Normal Operating Range- Moderately Severe Level
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 585 PID: SID 39 SPN: 677 FMI: 4 Starter Relay Driver Circuit- Voltage Below Normal or Shorted to Low Source
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 584 PID: SID 39 SPN: 677 FMI: 3 Starter Relay Driver Circuit- Voltage Above Normal or Shorted to High Source