Did you ever get your gauge issue resolved? I have an '05 Executive and having intermittent air gauge issue with. I'm not getting bad readings, it's just they either work or they don't and it can be just one of both. Either one, or both, will be sitting on zero (sort of just quivering) or they'll be reading OK. It's almost like it's cold weather related but that could just be a coincidence. I've been told that there is a module tucked up behind the dash somewhere but I can't see anything, but then I'm not sure what it looks like or how big it is and things are really packed in there. If you got your issue resolved what did you do to fix it?