Make: Cummins
Engine: ISL9 CM2350 (2013-17)
Fauld Code: 2962
PID: 412
SPN: 412
FMI: 16
Description: Exhaust Gas Recirculation Temperature – Data Valid But Above Normal
Operational Range – Moderately Severe Level
Troubleshooting:
Reason:
Exhaust Gas Recirculation Temperature – Data Valid But Above Normal Operational Range –
Moderately Severe Level. EGR temperature has exceeded the engine protection limit.
Effect:
Possible reduced engine performance.
Circuit Description:
The exhaust gas recirculation (EGR) temperature sensor is a variable resistor sensor and is
used to measure the temperature of the EGR gas flow after it exits the EGR cooler. The engine
control module (ECM) supplies 5 volts to the EGR temperature signal circuit. The ECM
monitors the change in voltage caused by changes in the resistance of the sensor to determine
the EGR flow temperature. The EGR temperature value is used by the ECM for the engine
protection system and engine emissions control.
Component Location:
The EGR temperature sensor is located on the EGR connection tube between the EGR cooler
and the air intake connection.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine
is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the EGR temperature was greater than 250°C
[482°F] for more than 5 seconds.
Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp 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, 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
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.
Shop Talk:
Note: This fault code will most likely not be active with no load in the shop. The engine must be
loaded to trigger this fault code
Possible Causes:
1) A fouled EGR cooler
2) Plugged or restricted EGR differential pressure sensor ports
3) A damaged EGR valve
4) A low reading from the EGR differential pressure sensor
5) A low reading for the EGR valve position sensor
6) High exhaust temperatures
7) Low coolant level
8) High coolant temperature
9) An incorrect coolant/water mixture
10) A stuck closed variable geometry turbocharger
Make: Cummins
Engine: ISL9 CM2350 (2013-17)
Fauld Code: 3137
PID: N/A
SPN: 5019
FMI: 4
Description: Engine Exhaust Gas Recirculation Outlet Pressure Sensor Circuit – Voltage Below
Normal or Shorted to Low Source
Troubleshooting:
Reason:
Engine Exhaust Gas Recirculation Outlet Pressure Sensor Circuit – Voltage Below Normal or
Shorted to Low Source. Low signal voltage detected at the EGR orifice pressure sensor.
Effect:
Possible reduced engine performance.
Circuit Description:
The engine control module (ECM) provides a 5 volt supply to the EGR orifice pressure sensor
on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The
EGR orifice pressure sensor provides a signal to the ECM on the EGR orifice pressure sensor
signal circuit. This sensor signal voltage changes based on the pressure at the EGR orifice
pressure sensor.
Component Location:
The EGR orifice pressure sensor is mounted on the EGR mass measurement assembly near
the EGR differential pressure sensor.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine
is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the EGR orifice pressure sensor signal voltage
was less than 0.25 volts for 5 seconds.
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, 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
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) Signal circuit open or shorted to ground in the engine harness or sensor
2) Supply line open or shorted to ground
Make: Cummins
Engine: ISL9 CM2350 (2013-17)
Fauld Code: 3228
PID: N/A
SPN: 3216
FMI: 2
Description: Aftertreatment 1 Intake NOx Sensor – Data Erratic, Intermittent, or Incorrect
Troubleshooting:
Reason:
Aftertreatment Intake NOx Sensor – Data Erratic, Intermittent, or Incorrect. An incorrect NOx
sensor reading has been detected by the aftertreatment intake NOx sensor.
Effect:
Possible reduced engine performance.
Circuit Description:
The aftertreatment intake NOx (nitrogen oxides) sensor is a smart device and communicates
with the engine control module (ECM) via the J1939 data link. The aftertreatment intake NOx
sensor performs internal diagnostics and reports malfunctions back to the primary ECM using
the J1939 data link. The NOx sensor is permanently attached to the NOx control module. They
are serviced as a single component and can not be replaced individually. The aftertreatment
intake NOx sensor is used to measure the NOx emissions at the intake of the aftertreatment
system.
Component Location:
The aftertreatment intake NOx sensor is mounted on the engine near the turbocharger turbine
outlet.
Conditions for Running the Diagnostics:
This diagnostic runs when the aftetreatment diesel oxidation catalsyst intake temperature
sensor has been above 150° C [302° F] for 5 seconds while the engine is running. This
diagnostic has to meet specific engine and aftertreatment conditions to run and complete
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the aftertreatment intake NOx reading was higher
or lower than the calculated aftertreatment intake NOx value for the engine operating
conditions.
Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp
(MIL) after the diagnostic fails on two consecutive trips.
Conditions for Clearing the Fault Code:
1) To validate the repair, it may be necessary to operate the vehicle on a chassis dynamometer
or to drive the vehicle in order to get the engine load high enough for the diagnostic to run.
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) EGR system leaks
2) Exhaust system leaks
3) An incorrectly installed aftertreatment intake NOx sensor
4) An aftertreatment intake NOx sensor that has carbon buildup on the tip of the sensor
5) A malfunctioning EGR differential pressure sensor.
6) A malfunctioning EGR valve
7) Excessive oil consumption
8) Possible engine misfire
9) The NOx sensor part number is incorrect
Page