Okay, so a little success story with the gauge - I used it on my dad's Odyssey, found the code P1491 - turns out to be a EGR valve issue - and there's a TSB on it and he qualifies for replacement.
So would they have still charged him the $106 for the diag read or not if its a warrenty (extended outside then normal range) item?
If so, I just made back more than half the cost of it unit
