ScanGaugeKR: What is unsupported on Kenworth / Peterbilt 2012 and newer?

Just got home and the ScanGuage KR that I ordered over the telephone is here. (Right on!) However, before hooking it up I visited the web site's product page, and that's when I read this:

"Works for all makes, models and years except 2012 and newer Kenworth or Peterbilt."

Oops - I've clearly missed something. Interestingly, I ordered the unit after it was recommended to me by the driver of a 2012 Kenworth T660. He said it was working great. My T660 is a 2013.

Can someone tell me what functions of the ScanGuage KR fail on newer model Kenworth and Peterbilt trucks?

Thanks!

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