Soot build up that sticks the turbo comes from two sources. One is the normal exhaust soot produced from combustion. The second source is from EGR gases that have soot in them, also from combustion. This is kind of the double whammy that may contribute to sticking.
Also there are two kinds of soot build up that can cause problems. One is the soot that gets packed at either end of the sliding nozzle travel and keeps the turbo from making full boost and/or full brake. The second is soot that sticks to the sliding nozzle or housing and binds up the nozzle keeping it from moving freely. This type of stick is generally associated with a customer reporting intermittent lack of power followed by burst of normal power. The P2262 is also a two trip fault so if it does stick one time it might not turn on the CEL. It has to stick in two consecutive trips to turn on the light and store the code.
There are several things we can do to reduce soot generation and possible sticking. First and most important is to have the latest flash available. The newest flashes keep soot generation to a minimum. The second thing is to run good quality, clean #2 diesel. Avoid BIO, especially more than 5%. Next keep idle to a minimum. There is a fair amount of EGR flow at idle, and at idle there is no boost pressure to better burn the fuel. Use the proper engine oil, change as indicated by oil change light, and change the breather filter as required. Avoid power enhancers as they add more fuel thus making more soot. Use of the EB can help because it moves the slider to the extremes of travel more than when it is not on.
That is about all we can do to keep it clean. If it does stick the dealer can try cleaning it once, and if that does not do it the turbo will probably have to be replaced. Also very important but beyond our control is the importance of following the cleaning procedure completely. I like to see six cans of cleaner used vs. the three specified. Also turbo should be hot as possible during the cleaning. The rest of the system has to be cleaned at the same time to get any excessive soot build up out of the EGR and intake system. The most important thing for the technician to do is determine the root cause of the soot. This is where the customer can help. Give the technician as much information as possible. If you were out hunting and idling around for a few days there is probably nothing wrong to "fix". Tell them what kind of driving you have been doing and any other symptoms you might be having. If you are having recurring problems with CEL there might be other causes that need to be diagnosed. Chrysler is paying actual time for cleaning and it is not unusual to have 8+ hours to properly clean the system. So for the bay area dealer that have labor rates in excess of $120/hr it's not chump change. Believe me Chrysler wants to get it fixed correctly just as bad as you do, and they are paying the technicians fairly to make sure it gets done.
I'm sure I forgot some things, but I think I covered the high points.
Attention: TDR Forum Junkies 
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