Sounds like you're caught between the E-rated radials, and, IIRC, TPMS.
On the one side, you have what are basically 10 ply 80 PSI tractor-trailer tires.
While it's feasible to deflate them to "normal" pressures, your automatic
tire pressure monitoring alarm goes off if you try it.
I can't tell you it would be a good idea to disable your tire pressure monitoring
system.(or, possibly, use electrical tape to cover the light on the dash- that
would be very irresponsible)
Have you contacted a dealer about this issue?
It seems there was a time, in our recent past, when we
could check our own tire pressures without the aid of
a separate, dedicated factory system...
Last edited by therewolf; 06-20-2011 at 11:11 AM.