Make: Cummins
Engine: ISM CM875 (2003-06)
Fauld Code: 197
PID: P111
SPN: 111
FMI: 1/18
Description: Coolant Level – Data Valid But Below Normal Operating Range – Moderately
Severe Level. Low engine coolant level detected.
Troubleshooting:
This fault code goes active when the coolant level inside the radiator top tank or surge tank
drops below the sensor level. Fill the top tank with coolant.
If this fault code is active and the coolant level is not low, disconnect the coolant level sensor
and check the connectors for traces of coolant. If coolant is found at the electrical connectors,
the sensor has malfunctioned and must be replaced.
For intermittent power supply and datalink communication issues with Aftertreatment
Components, it is highly recommended that the OEM Power Distribution Center fuses and
relays be thoroughly checked for loose, missing or intermittent connections.
Note: It may not be possible to perform an aftertreatment diesel particulate filter (DPF)
regeneration while this fault code is active.
Possible repairs:
1)Add coolant to the engine.
2)If necessary, calibrate the ECM.
Make: Cummins
Engine: ISM CM876 (2007-09)
Fauld Code: 1893
PID: SID 324
SPN: 3251
FMI: 2
Description: EGR Valve Control Circuit – Abnormal Update Rate. No communications or invalid
data transfer rate detected on the SAE J1939 data link between the ECM and the smart EGR
valve.
Troubleshooting:
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, calibrate the ECM. For ISX and ISM engines, see the following procedure in the
corresponding Troubleshooting and Repair Manual for the engine being serviced.
This fault code is logged when the primary engine ECM did not receive valid SAE J1939
information from the EGR valve.
Possible causes of this fault code include:
1)The EGR valve is not receiving power from the ECM. This could be caused by an open
circuit in the power supply wire or low voltage supplied by the primary engine ECM.
2)Open return circuit on the EGR valve circuit between the engine ECM and the EGR valve.
3)Open or short circuit on the SAE J1939 data link circuit between the ECM and the EGR
valve.
4)Intermittent communications between the EGR valve and the primary engine ECM on the
SAE J1939 data link.
5)Malfunctioning termination resistors in the engine data link harness.
6)A malfunctioning engine ECM.
7)A malfunctioning EGR valve.
Possible repairs:
1)Clean the connector and pins.
2)Tighten the ground connection.
3)Replace the engine harness.
4)Replace the ECM.
5)Replace the SAE J1939 termination resistor.
6)Repair or replace the engine harness.
7)Replace the EGR valve.
Make: Cummins
Engine: ISM CM876 (2007-09)
Fauld Code: 1899
PID: 411
SPN: 411
FMI: 1
Description: Exhaust Gas Recirculation Valve Delta Pressure – Data Valid But Below Normal
Operating Range – Moderately Severe Level. The EGR differential pressure sensor has
detected low EGR gas flow or the EGR differential pressure reading is not valid for engine
operating conditions.
Troubleshooting:
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, calibrate the ECM.
This diagnostic checks the reading of the EGR differential pressure sensor when the EGR
valve is open. Since the EGR valve is open, the reading of the EGR differential pressure must
be greater than 0. If the ECM detects a reading lower than expected with the EGR valve open,
this fault code is logged.
Possible causes:
1)A damaged EGR differential pressure sensor.
2)A leaking low or high EGR differential pressure tube.
3)A stuck closed EGR valve.
4)A plugged or restricted EGR cooler.
Note: Do not replace the EGR differential pressure tubes for plugging unless Fault Code 2774
is active.
Possible repairs:
1)Remove and clean both EGR differential pressure tubes. Then install and tighten the fittings,
or replace the EGR differential pressure tubes.
2)Replace the EGR differential pressure sensor adapter.
3)Clear the restriction or replace the EGR cooler.
4)Clean the connector and pins.
5)Replace the EGR delta pressure sensor.
6)Repair or replace the engine harness.
7)Replace the ECM.
8)Clean the EGR cooler, if possible.
9)If necessary, calibrate the ECM.