Paccar

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. Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Signal circuit shorted to sensor supply or battery voltage. Possible repairs: 1)Replace the aftertreatment diesel particulate filter differential pressure sensor.2)Repair or replace the OEM harness. PACCAR PX-8 CM2150 (2007-09) Fault Code: 1878 PID: SPN: 3245 FMI: 2 Aftertreatment Exhaust Gas Temperature 3 – Data Erratic, Intermittent, or Incorrect. The aftertreatment diesel particulate filter outlet temperature sensor is...

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. Possible causes: 1)Signal circuit open or shorted to ground in the engine harness or sensor2)Supply line open or shorted to ground. Possible reapirs: 1)Replace the aftertreatment diesel particulate filter differential pressure sensor.2)The removal and installation of the connector may correct the fault.3)Repair or replace the OEM harness. PACCAR PX-8 CM2150 (2007-09) Fault Code: 1879 PID: SID 324 SPN: 3251 FMI: 3 Aftertreatment Particulate Filter Differential Pressure Sensor...

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. Possible causes: 1)Stuck in-range aftertreatment diesel particulate filter differential pressure sensor reading2)High resistance in the aftertreatment diesel particulate filter differential pressure sensor signal or return wires3)Plugged aftertreatment differential pressure sensor ports could cause this fault code if pressure is held in the port after the engine is turned off. Possible reapirs: 1)Replace the aftertreatment diesel particulate filter differential pressure sensor.2)Repair or replace the OEM harness.3)Replace the ECM.v...

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. When the keyswitch is initially turned on and at various times during engine operation, the closed position of the EGR valve is checked. This diagnostic checks to make sure the EGR valve is not stuck open. This fault code is logged when the following error conditions exist: 1)The EGR valve motor measures the position of the EGR valve at initial key-on. If the valve is detected to...

Verify the 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 EGR differential pressure sensor reading when the EGR valve is open. Since the EGR valve is open, the reading of the EGR differential pressure must be greater than zero. If the ECM detects a reading lower than expected with the EGR valve open, this fault code is logged. Possible causes: 1)A malfunctioning EGR differential pressure sensor2)A stuck closed EGR valve3)EGR differential pressure sensor flow port cross-drillings...