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Reason:Aftertreatment SCR Outlet Temperature – Data Valid But Above Normal Operational Range – Most Severe Level. The selective catalytic reduction (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...

Reason:Aftertreatment Doser – Data Valid But Below Normal Operating Range – Moderately Severe Level. The ECM detects that the aftertreatment fuel injector has used up all compensation. Effect:Possible frequent need for aftertreatment regeneration Circuit Description:The aftertreatment fuel injector is electronically controlled by the engine electronic control module (ECM) through a pulse width modulated (PWM) signal. The amount of fuel injected is determined by how long the PWM signal to the injector is on. Component Location:The aftertreatment fuel injector is installed in the exhaust system in the turbocharger adapter pipe. The aftertreatment fuel pressure sensor and aftertreatment fuel shutoff valve are...

Reason:Aftertreatment Doser – Data Valid But Below Normal Operating Range – Moderately Severe Level. The ECM detects that the aftertreatment fuel injector has used up all compensation. Effect:Possible frequent need for aftertreatment regeneration Circuit Description:The aftertreatment fuel injector is electronically controlled by the engine electronic control module (ECM) through a pulse width modulated (PWM) signal. The amount of fuel injected is determined by how long the PWM signal to the injector is on. Component Location:The aftertreatment fuel injector is installed in the exhaust system in the turbocharger adapter pipe. The aftertreatment fuel pressure sensor and aftertreatment fuel shutoff valve are...

Reason:Injector Solenoid Driver Cylinder 1 Circuit – Current Below Normal or Open Circuit. Current detected at injector 1 when voltage is turned OFF. Effect:Possible reduced engine performance Circuit Description:The injector solenoid valves control fueling quantity and injection timing. The engine control module (ECM) energizes the solenoid by closing a high-side and a low-side switch. Each injector circuit has a dedicated low side switch that completes the circuit path to ground inside the ECM. Component Location:The engine harness connects the ECM to the pass-through connector(s) that are located in the rocker housing. Internal injector harnesses are located under the valve cover...

Reason:Aftertreatment Intake NOx Sensor – Data Erratic, Intermittent, or Incorrect. An incorrect NOx sensor reading has been detected by 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 component and can not be replaced individually. The aftertreatment...