Cummins ISB6.7 CM2150 (2007-09) Fault Code: 2743 PID: SPN: 3249 FMI: 18 Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Below Normal Operating Range – Moderately Severe Level. The temperatures in the aftertreatment system can not reach the required temperatures for stationary regeneration.

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, recalibrate the ECM.

The aftertreatment system will try to meet target temperatures at the inlet of the diesel oxidation catalyst prior to beginning a stationary regeneration event. This fault code is activated if the engine is not able to meet the commanded minimum exhaust temperature required at the inlet of the aftertreatment system. This is prior to any aftertreatment fuel injection into the exhaust system.

Possible caused:

1)A leaking exhaust system between the turbocharger and the aftertreatment diesel oxidation catalyst
2)Excessive exhaust temperature loss between the turbocharger outlet and the inlet of the aftertreatment system.

Possible repairs:

1)Replace the damaged aftertreatment temperature sensor.
2)Repair or replace the damaged exhaust system component.
3)Replace the damaged component.