Sorry, KenE, not to have added that BTM was disfunctional as well. I have been looking at Tav for a few days and noted that at least it always starts out reflecting ambient temperature, which is a crosscheck of sorts. Highest Tav to date was 93F the day before yesterday, when the OAT here in Stuart, Fl was 86F or so.

BTW, after doing that 3 and 6 button press on the nav system panel yesterday, which gets one into the diagnostics, I noticed that the system reads the DTC's and can acknowledge ( get rid of, I think ) them. Thus one doesn't need the ScanGuage for that activity if you have the 2008 nav.

John