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Reason:Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Above Normal Operating Range – Moderately Severe Level. The diesel exhaust fluid tank heater is continuously in the ON position. Effect:None on performance Circuit Description:The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating...

Reason:Crankcase Pressure Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the crankcase pressure circuit. Effect:None on performance. Circuit Description:The crankcase pressure sensor is used to monitor the pressure inside the crankcase. The engine control module (ECM) supplies the crankcase pressure sensor a 5 volt reference voltage. When the crankcase pressure is low, the sensor signal voltage is low. When the crankcase pressure is high, the sensor signal voltage is near the 5 volt reference voltage. The ECM monitors the crankcase pressure signal circuit voltage to calculate the pressure of the air within the...

Reason:Crankcase Pressure Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the crankcase pressure circuit. Effect:None on performance. Circuit Description:The crankcase pressure sensor is used to monitor the pressure inside the crankcase. The engine control module (ECM) supplies the crankcase pressure sensor a 5 volt reference voltage. When the crankcase pressure is low, the sensor signal voltage is low. When the crankcase pressure is high, the sensor signal voltage is near the 5 volt reference voltage. The ECM monitors the crankcase pressure signal circuit voltage to calculate the pressure of the air within the...

Reason:Water-in-Fuel Indicator – Data Valid But Above Normal Operating Range – Moderately Severe Level. The Water-In-Fuel Indicator indicates that the water level is above warning level. Effect:None on performance Circuit Description:The water-in-fuel sensor is attached to the fuel filter. The engine control module (ECM) provides a 5 volt reference signal to the water-in-fuel sensor. When the water collected in the fuel filter covers the sensor probes, the water-in-fuel sensor pulls the 5-VDC reference voltage to ground, indicating high water accumulation in the fuel filter. Component Location:The water-in-fuel sensor is integrated into the bottom of the OEM supplied suction fuel filter....

Reason:Water-in-Fuel Indicator – Data Valid But Above Normal Operating Range – Moderately Severe Level. The Water-In-Fuel Indicator indicates that the water level is above warning level. Effect:None on performance Circuit Description:The water-in-fuel sensor is attached to the fuel filter. The engine control module (ECM) provides a 5 volt reference signal to the water-in-fuel sensor. When the water collected in the fuel filter covers the sensor probes, the water-in-fuel sensor pulls the 5-VDC reference voltage to ground, indicating high water accumulation in the fuel filter. Component Location:The water-in-fuel sensor is integrated into the bottom of the OEM supplied suction fuel filter....