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Reason:Aftertreatment Intake NOx Sensor – Abnormal Update Rate. No communication or an invalid data transfer rate has been detected on the J1939 data link between the ECM and the aftertreatment intake NOx sensor. Effect:Possible reduced engine performance Circuit Description:The aftertreatment intake NOx (nitrogen oxides) sensor is a smart device and communicates with the engine control module (ECM) via the J1939 data link. The aftertreatment intake NOx sensor performs internal diagnostics and reports malfunctions back to the primary ECM using the J1939 data link. The NOx sensor is permanently attached to the NOx control module. They are serviced as a single...

Reason:Aftertreatment SCR Outlet Temperature – Data Valid But Above Normal Operating Range – Moderately Severe Level. The SCR outlet temperature sensor reading has exceeded the maximum temperature limit. Effect:Possible reduced engine performance. Circuit Description:The aftertreatment SCR (selective catalytic reduction) temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment SCR temperature sensor module performs its own internal diagnostics and reports malfunctions back to the engine control module using the J1939 data link. The aftertreatment SCR temperature sensor module is used to measure the aftertreatment SCR intermediate temperature and aftertreatment...

Reason:Aftertreatment SCR Outlet Temperature – Data Valid But Above Normal Operating Range – Moderately Severe Level. The SCR outlet temperature sensor reading has exceeded the maximum temperature limit. Effect:Possible reduced engine performance. Circuit Description:The aftertreatment SCR (selective catalytic reduction) temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment SCR temperature sensor module performs its own internal diagnostics and reports malfunctions back to the engine control module using the J1939 data link. The aftertreatment SCR temperature sensor module is used to measure the aftertreatment SCR intermediate temperature and aftertreatment...

Reason:Aftertreatment Diesel Exhaust Fluid Line Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the diesel exhaust fluid line heater 1 circuit. Effect:Possible reduced engine performance. Circuit Description:The aftertreatment diesel exhaust fluid line heaters are used to defrost and/or prevent freezing of the diesel exhaust fluid lines. Component Location:The aftertreatment diesel exhaust fluid line heater 1 is located on the supply line between the diesel exhaust fluid dosing unit and the diesel exhaust fluid dosing valve. Conditions for Running the Diagnostics:This diagnostic runs when the keyswitch is in the ON position and...

Reason:Aftertreatment Diesel Exhaust Fluid Line Heater 2 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the diesel exhaust fluid line heater 2 circuit. Effect:Possible reduced engine performance. Circuit Description:The aftertreatment diesel exhaust fluid line heaters are used to defrost and/or prevent freezing of the diesel exhaust fluid lines. Component Location:The aftertreatment diesel exhaust fluid line heater 2 is located on the return line between the diesel exhaust fluid dosing unit and diesel exhaust fluid tank. Conditions for Running the Diagnostics:This diagnostic runs when the keyswitch is in the ON position and line heating...