The "bad info" I referenced seems to run the whole spectrum.
No Sensor
Pressure ~20psi higher than actual
Pressure ~20psi lower than actual
The temp info was a bit more believable. I'm not sure that it was correct, but it wasn't so whacky as to obviously be wrong.
The problems are limited to 2 of the 4 sensors.
If the darn behavior had a pattern that would help me come up with a theory. I'm hopeful that putting the sensors on my truck and watching what happens for a week or two will be a big help. My towing consists of a big roadtrip once/month. My trailer isn't stored at home. So I'd grind my teeth at the system during the trip, but then not really work on the system to overcome the problems when I got home. That's not a good recipe for success.
I saw in this forum that one guy had put an antenna under his truck near the hitch. That was cleverly done. My Tireminder doesn't have an external antenna connection, but the post gives me some interesting ideas re. moving the repeater.
I do have new o-rings but I've not used them.
I've not contacted TM yet. If I do end up contacting them, I want to have good notes on precisely what I tried and what happened.