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PACCAR PX-6 CM2150 (2007-09) Fault Code: 1866 PID: 411 SPN: 411 FMI: 2 Exhaust Gas Recirculation Valve Delta Pressure - Data Erratic, Intermittent, or Incorrect. An error in the EGR delta pressure signal was detected at initial key-on or the sensor failed the autozero test.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1876 PID: SPN: 3245 FMI: 3 Aftertreatment Exhaust Gas Temperature 3 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the aftertreatment diesel particulate filter outlet temperature sensor circuit.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1877 PID: SPN: 3245 FMI: 4 Aftertreatment Exhaust Gas Temperature 3 Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the aftertreatment diesel particulate filter outlet temperature sensor circuit.

PACCAR PX-6 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 not changing with engine operating conditions.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1879 PID: SID 324 SPN: 3251 FMI: 3 Aftertreatment Particulate Filter Differential Pressure Sensor Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at the aftertreatment differential pressure sensor circuit.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1881 PID: SID 324 SPN: 3251 FMI: 4 Aftertreatment Particulate Filter Differential Pressure Sensor Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage or open circuit detected at the aftertreatment differential pressure sensor circuit.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1883 PID: SID 324 SPN: 3251 FMI: 2 Aftertreatment Diesel Particulate Filter Differential Pressure Sensor - Data Erratic, Intermittent, or Incorrect. The aftertreatment diesel particulate filter differential pressure sensor is reading an erratic value at initial key-ON or during engine operation.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1896 PID: SID 146 SPN: 2791 FMI: 13 EGR Valve Controller - Out of Calibration. The EGR valve has failed the automatic calibration procedure at initial key-on.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1899 PID: 411 SPN: 411 FMI: 1 Exhaust Gas Recirculation (EGR) Valve Delta Pressure - Data Valid But Above 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.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 1911 (ISB/QSB3.3) PID: 157 SPN: 157 FMI: 0 Injector Metering Rail Number 1 Pressure - Data Valid but Above Normal Operating Range - Most Severe Level. The ECM has detected that fuel pressure in the rail fuel is higher than the commanded pressure.