Thanks - this helps, and I've been reading some of your other posts on the topic before and after I posted this to get a better understanding of how the system works, and I appreciate your knowledge.

No coolant loss from the reservoir - none observed while running, no puddle, and level not lower ...

I forgot to mention -- there were no codes or warning lights/messages on the dash.

Hello all,

Long time browser of this site, first post, XC90 owner for the past several years, and have been working on cars for 30+ years. I am over 1100 miles from home and need help.

I just drove my 2005 XC90 V8 from Toledo, Ohio, to Dallas, Texas over the past 32 hours or so. Did ~540 miles ...