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Reason:VGT Actuator Driver Circuit – Condition Exists. A calibration mismatch between the VGT actuator and the ECM has been detected. Effect:VGT actuation will be disabled Circuit Description:The variable geometry turbocharger (VGT) is electronically activated by the VGT actuator. The VGT actuator is a smart device and receives information via the J1939 data link from the primary engine control module (ECM). The VGT actuator performs its own diagnostics and reports malfunctions back to the primary engine ECM, using the J1939 data link. The ECM then decodes the error message and converts it to a fault code. Component Location:The VGT actuator is...

Reason:VGT Actuator Driver Circuit – Abnormal Update Rate. No communications on the J1939 data link between the engine ECM and the smart VGT controller. Effect:Possible reduced engine performance Circuit Description:The variable geometry turbocharger (VGT) is electronically activated by the VGT actuator. The VGT actuator is a smart device and receives information via the J1939 data link from the primary engine control module (ECM). The VGT actuator performs its own diagnostics and reports malfunctions back to the primary engine ECM, using the J1939 data link. The ECM then decodes the error message and converts it to a fault code. Component Location:The...

Reason:Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level. The temperature increase across the aftertreatment catalyst is lower than expected. Effect:Possible frequent need for aftertreatment regeneration Circuit Description:The aftertreatment diesel particulate filter temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment diesel partculate filter temperature sensor module performs its own internal diagnostics and reports malfunctions back to the engine control module using the J1939 data link. The aftertreatment diesel particulate filter temperature sensor module is used to measure the...

Reason:Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level. The temperature increase across the aftertreatment catalyst is lower than expected. Effect:Possible frequent need for aftertreatment regeneration Circuit Description:The aftertreatment diesel particulate filter temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment diesel partculate filter temperature sensor module performs its own internal diagnostics and reports malfunctions back to the engine control module using the J1939 data link. The aftertreatment diesel particulate filter temperature sensor module is used to measure the...

Reason:Aftertreatment Diesel Particulate Filter Differential Pressure – Data Valid But Above Normal Operating Range – Least Severe Level. The soot load of the aftertreatment diesel particulate filter has exceeded the recommended limits. Effect:Possible reduced engine performance Circuit Description:The engine aftertreatment system monitors the soot load in the aftertreatment diesel particulate filter. Under normal operating conditions, the aftertreatment diesel particulate filter is self-cleaning, where soot is converted to carbon dioxide, nitrogen, and water. Under light load operating conditions, it can be necessary to perform a stationary regeneration of the aftertreatment diesel particulate filter. The soot load in the aftertreatment diesel particulate...