Lamp:Amber Reason:The turbocharger shaft has seized. Effect:Possible reduced engine performance. Circuit Description:The turbocharger speed sensor is a hall effect type sensor. The Engine Control Module (ECM) provides a 5 volt supply to the position sensor and a return circuit. As the blades of the turbocharger spin past the speed sensor, a signal is generated on the position sensor signal circuit. The ECM interprets this signal and converts it to a turbo speed. Component Location:The turbocharger speed sensor is located on the high pressure compressor housing. Conditions for Running the Diagnostics:This diagnostic runs continuously when the engine is running. Conditions for...

Lamp:Amber Reason:The intake manifold pressure is not rational. Effect:Possible reduced engine performance. Circuit Description:The Engine Control Module (ECM) provides a 5 volt supply to the intake manifold pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The intake manifold pressure sensor provides a signal to the ECM on the intake manifold pressure sensor signal circuit. This sensor signal voltage changes based on the pressure in the intake manifold. Component Location:The intake manifold 1 pressure/temperature sensor is located in the air intake manifold. Conditions for Running the Diagnostics:This diagnostic consists of two...

Lamp:Amber Reason:The intake manifold pressure is not rational. Effect:Possible reduced engine performance. Circuit Description:The Engine Control Module (ECM) provides a 5 volt supply to the intake manifold pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The intake manifold pressure sensor provides a signal to the ECM on the intake manifold pressure sensor signal circuit. This sensor signal voltage changes based on the pressure in the intake manifold. Component Location:The intake manifold 1 pressure/temperature sensor is located in the air intake manifold. Conditions for Running the Diagnostics:This diagnostic consists of two...

Lamp:Amber Reason:The aftertreatment outlet NOx sensor reading is not valid. 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 the outlet...

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...