PACCAR PX-6 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.
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 outlet of the diesel oxidation catalyst during a regeneration event. This fault code is activated when the control system detects that excessive fuel is entering the exhaust system, in an attempt to meet the target temperatures at the diesel oxidation catalyst outlet temperature sensor.
Possible causes:
1)Soot plugging the front face of the aftertreatment diesel oxidation catalyst
2)Engine oil or fuel contamination of the aftertreatment diesel oxidation catalyst
3)A cracked or contaminated aftertreatment diesel oxidation catalyst
4)A leaking exhaust system between the turbocharger and the aftertreatment diesel oxidation catalyst
5)The duty cycle of the vehicle is not high enough to provide adequate exhaust temperatures for a complete regeneration event.
Possible repairs:
1)Repair or replace the damaged exhaust system component.
2)Perform the stationary regeneration procedure
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