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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2743 PID: SPN: 2743 FMI: 18 Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Below Normal Operating Range – Moderately Severe Level.
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.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2742 PID: SPN: 2742 FMI: 17 Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Below Normal Operating Range – Least Severe Level. The temperatures in the aftertreatment system can not reach the required temperatures for stationary regeneration.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2728 PID: SPN: 3556 FMI: 16 Aftertreatment Fuel Injector 1 – Data Valid but Above Normal Operational Range – Moderately Severe Level. Active regeneration of the aftertreatment diesel particulate filter has been detected to be ineffective.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2659 PID: 110 SPN: 110 FMI: 31 Engine Coolant Temperature – Condition Exists. The EGR valve was closed to reduce engine coolant temperature.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2646 PID: 110 SPN: 110 FMI: 31 Engine Coolant Temperature – Condition Exists. The EGR valve was closed to reduce engine coolant temperature.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2639 PID: SID 324 SPN: 3251 FMI: 0 Aftertreatment Diesel Particulate Filter Differential Pressure – Data Valid But Above Normal Operating Range – Least Severe Level. The soot load of the aftertreatment diesel particulate filter has exceeded the recommended limits.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2638 PID: SPN: 3050 FMI: 13 Catalyst Efficiency – Out of Calibration. The temperature increase across the aftertreatment diesel oxidation catalyst is lower than expected.