Lamp:None Reason:An offset in the intake NOx sensor reading has been detected. 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 component and can not be replaced individually. The aftertreatment intake NOx sensor is used to measure the NOx emissions at the...

Lamp:None Reason:An incorrect NOx sensor reading has been detected by the aftertreatment intake NOx sensor. Effect:None on 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 component and can not be replaced individually. The aftertreatment intake NOx sensor is used to measure the NOx emissions...

Lamp:None Reason:An offset in the outlet NOx sensor reading has been detected. Effect:None on performance. Circuit Description:The aftertreatment outlet NOx (Nitrogen Oxides) sensor is a smart device and communicates with the Engine Control Module (ECM) via the J1939 data link. The aftertreatment outlet NOx sensor performs its own 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 component and can not be replaced individually. The aftertreatment outlet NOx sensor is used to measure the NOx emissions at...

Lamp:Amber Reason:The diesel exhaust fluid pressure sensor has reported a reading too high or low for the operating conditions. Effect:Possible reduced engine performance. Circuit Description:The diesel exhaust fluid dosing unit lines are responsible for transporting diesel exhaust fluid between the dosing unit, dosing valve, and diesel exhaust fluid tank. Component Location:There are three diesel exhaust fluid lines. One line is between the dosing unit and dosing valve, and the other two lines are between the dosing unit and the diesel exhaust fluid tank. These lines can be partially hidden from view by the SCR system and other vehicle components. Line...

Lamp:Amber Reason:High aftertreatment diesel exhaust fluid flow detected. Effect:Possible reduced engine performance. Circuit Description:The aftertreatment diesel exhaust fluid dosing valve is controlled by the ECM. When the Engine Control Module (ECM) commands DEF dosing, the ECM sends a Pulse-Width Modulated (PWM) signal to the dosing valve, which opens the dosing valve and allows DEF to be sprayed into the exhaust stream. Component Location:1. The aftertreatment diesel exhaust fluid dosing unit location is Original Equipment Manufacturer (OEM) dependent.2. The aftertreatment diesel exhaust fluid dosing valve is installed in the exhaust system. It is mounted directly to the aftertreatment decomposition tube, before...