Fault code 2754 - 2011 KW T660

[Waterloo]

Go to Cummins http://www.Quickserve.com and enter your ESN and open an account where you can do your own searches on your particular motor, much quicker that way. I would also recommend going over to Ebay and purchasing an Inline 5 reader, one of the Chinese ones, as you are going to need it. One of the guys here can help load the software up, it should come with the reader itself.

Here is your code meaning direct from Cummins, fault code 2754. I wish I could tell you more, one of the more knowledgeable here hopefully will chime in and point you in the right direction.
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Fault Code 2754

Engine Particulate Filter Inlet Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level. Excessive black smoke has been detected exiting the engine and entering the aftertreatment diesel particulate filter.

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 filter is estimated using the aftertreatment differential pressure sensor and the calculated soot output of the engine.

This fault code is logged when the sensors in the aftertreatment system indicates soot accumulation inside the diesel particulate filter is happening at a higher rate than under normal conditions. This indicates that the smoke (soot) being produced from the engine is higher than normal.

Component Location

The aftertreatment diesel particulate filter is located in the exhaust system and is installed by the original equipment manufacturer (OEM).

Conditions for Running the Diagnostics

This diagnostic runs continuously when engine speed is greater than 500 rpm.

Conditions for Setting the Fault Codes

This fault code is logged when the soot accumulation inside the diesel particulate filter is happening at a higher rate than under normal conditions.

Action Taken When the Fault Code is Active

The fault code is active immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code

The electronic control module (ECM) will disable the fault code immediately after the diagnostic runs and passes or after a keyswitch cycle.

Shop Talk

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. Refer to Procedure 019-032 (ECM Calibration Code) in Section 19 in the corresponding Troubleshooting and Repair Manual for the engine being serviced.

Possible causes of this fault code include:

Boost leaks in the charge air cooler plumbing
A malfunctioning variable geometry turbocharger (VGT)
A malfunctioning exhaust gas recirculation (EGR) valve
A malfunctioning in-range EGR differential pressure sensor
A malfunctioning in-range boost pressure sensor
A malfunctioning in-range barometric pressure sensor
A cylinder misfire or overfueling.
Refer to Troubleshooting Fault Code t05-2754

Oh, when you find that cliff, send me the directions! ;-)