Make: Cummins
Engine: ISL9 CM2350 (2013-17)
Fauld Code: 1896
PID: SID 146
SPN: 2791
FMI: 13
Description: EGR Valve Controller – Out of Calibration
Troubleshooting:
Reason:
EGR Valve Controller – Out of Calibration. The EGR valve has failed the automatic calibration
procedure at initial key ON.
Effect:
Possible reduced engine performance
Circuit Description:
The exhaust gas recirculation (EGR) valve is controlled by a brushless motor located on top of
the EGR valve. The EGR valve motor uses three different motor legs to move the valve
through its range of motion. The ECM uses the EGR motor A, B, and C wires to command the
EGR valve to the appropriate position in order to meet EGR flow targets.The EGR valve motor
contains three position sensors that detect the location of the EGR valve. These sensors report
the position of the valve back to the ECM over the EGR valve position A, B, and C wires.
Component Location:
The EGR Valve and EGR Differential Pressure Sensor location varies depending on engine
model.
Conditions for Running the Diagnostics:
This diagnostic runs at initial key ON and occasionally during normal engine operation after the
EGR valve is commanded closed.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the EGR valve failed the autozero span check.
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) Exhaust Gas Recirculation (EGR) valve operation will be disabled.
3) 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, perform a key cycle and leave the key in the ON position for 2
minutes. Then start the engine and let it idle for 1 minute.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE
immediately after the diagnostic runs and passes.
3) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs
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Diagnostic Trouble Code Solutions 16/12/2024 15:25:03
and passes.
4) 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.
5) 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.
Shop Talk:
When the keyswitch is initially turned ON and at various times during engine operation, the
closed position of the EGR valve is checked. This diagnostic checks to make sure the EGR
valve is not stuck open. The EGR valve will close when the fault code is active. The fault code
will remain active until the next key cycle. The aftertreatment system must be inspected after
making the appropriate repair outlined in this fault code troubleshooting tree. Progressive
damage to the aftertreatment system may have occurred. Perform the Snap-Acceleration Test
to check for a malfunctioning diesel particulate filter.
Possible Causes:
1) Inactive fault codes
2) Faulty ECM
Make: Cummins
Engine: ISL9 CM2350 (2013-17)
Fauld Code: 1925
PID: SID 334
SPN: 3482
FMI: 2
Description: Aftertreatment Fuel Shutoff Valve – Data Erratic, Intermittent, or Incorrect
Troubleshooting:
Reason:
Aftertreatment Fuel Shutoff Valve 1 – Data Erratic, Intermittent, or Incorrect. An error has been
detected in the aftertreatment fuel shutoff valve or the aftertreatment fuel injector system.
Effect:
Possible reduced engine performance
Circuit Description:
Before active regeneration of the aftertreatment DPF, a diagnostic test on the system is
performed. The aftertreatment fuel injector opens and relieves fuel pressure in the line. The
aftertreatment fuel pressure sensor must be reading atmospheric pressure at this point in the
test. The aftertreatment fuel drain valve closes. The aftertreatment fuel shutoff valve and
aftertreatment fuel injector then close and trap the fuel between the aftertreatment fuel shutoff
valve and the aftertreatment fuel injector. The diagnostic checks to make sure the system
maintains fuel pressure.
Component Location:
The aftertreatment fuel injector is installed in the exhaust system in the turbocharger adapter
pipe. The aftertreatment fuel pressure sensor and aftertreatment fuel shutoff valve are installed
in the shutoff valve manifold.
Conditions for Running the Diagnostics:
This diagnostic runs during active regeneration of the aftertreatment diesel particulate filter.
Conditions for Setting the Fault Codes:
The engine control module (ECM) detected an internally leaking aftertreatment fuel shutoff
valve.
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) Active regeneration of the aftertreatment diesel particulate filter will be disabled unitl the next
key cycle.
3) 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 and perform the INSITE™ electronic service tool
Aftertreatment Diesel Particulate Filter Regeneration Test.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE
immediately after the diagnostic runs and passes.
3) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs
and passes.
4) 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.
5) 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.
Shop Talk:
N/A
Possible Causes:
1) Internal leak of the aftertreatment fuel shutoff valve allowing fuel pressure to leak past the
shutoff valve
2) Stuck closed, plugged, or clogged aftertreatment fuel injector
Make: Cummins
Engine: ISL9 CM2350 (2013-17)
Fauld Code: 1932
PID: SID 382
SPN: 3556
FMI: 2
Description: Aftertreatment Doser – Data Erratic, Intermittent, or Incorrect
Troubleshooting:
Reason:
Aftertreatment Doser – Data Erratic, Intermittent, or Incorrect. An internal or external fuel leak
has been detected in the aftertreatment fuel system.
Effect:
Possible reduced engine performance
Circuit Description:
Before active regeneration of the aftertreatment DPF, a diagnostic test on the system is
performed. The aftertreatment fuel injector opens and relieves fuel pressure in the line. The
aftertreatment fuel pressure sensor must be reading atmospheric pressure at this point in the
test. The aftertreatment fuel drain valve closes. The aftertreatment fuel shutoff valve and
aftertreatment fuel injector then close and trap the fuel between the aftertreatment fuel shutoff
valve and the aftertreatment fuel injector. The diagnostic checks to make sure the system
maintains fuel pressure.
Component Location:
The aftertreatment fuel injector is installed in the exhaust system in the turbocharger adapter
pipe. The aftertreatment fuel pressure sensor and aftertreatment fuel shutoff valve are installed
in the shutoff valve manifold.
Conditions for Running the Diagnostics:
This diagnostic runs during active regeneration of the aftertreatment diesel particulate filter.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected a leaking aftertreatment fuel injector or an external
leak.
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) Active regeneration of the aftertreatment diesel particulate filter will be disabled unitl the next
key cycle.
3) 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 and perform the INSITE™ electronic service tool
Aftertreatment Diesel Particulate Filter Regeneration Test.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE
immediately after the diagnostic runs and passes.
3) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs
and passes.
4) 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.
5) 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.
Shop Talk:
N/A
Possible Causes:
1) A stuck open or leaking aftertreatment fuel injector
2) An external leak in the aftertreatment fuel injector system.
3) A leaking aftertreatment fuel shutoff manifold