and I have aftermarket rims with no sensors and have never received a message either, obviously it's not the best system ever created[8D]

 

I have the same message on my 06 H3 and it drives me crazy. I wonder if the message will go away if I just rotate my 4 tires..????

 

I am dealing with this too. I rotated the spare on and did the instructions in the manual to re-calibrate the sensors but the warning light (low tire) is still on. Very frustrating. I followed the instructions 3 times with no luck.

 

The "Service TPMS" message will go away when you press the trip odo, but the flat tire dummy light will still stay lit.

Run through the procedure to reset the system, it is straightforward. If that doesn't work, one or more of your sensors may need to be replaced. They have a life expectancy, and they are battery powered. You can pick sensors up on flea bay for $50 each or so. Any tire place can install them (figure $20 a tire in the NYC or other major metro areas). The sensors may vary by year, and make sure you buy the nut in addition to the sensor as they don't always come together in a pack.

The reset procedure (from memory) is:
flick the lights from "auto" to "off" and back again 4 times in 3 seconds
you will hear the horn beep twice
let air out of the front driver tire for 10 seconds
another beep
release air from front passenger tire
beep
rear passenger tire
beep
rear driver tires
double beep
re-pressurize your tires
drive for 5 to 15 miles, all messages should clear from the DIC

Find the actual procedure, it is somewhere on this board, as I wrote it from memory just to show it's easy to do, but my memory may be a little off.

Also, not all spare tires came with the sensors, so if you include your spare into a tire rotation, you will trigger the system. I can tell you the 2008s had spares without TPMs. Not sure about the other years. Also keep in mind, each sensor has a unique address, which needs to be registered to the truck's computer. So if your spare has a sensor, and you have it mounted on an axle, you have to run through the reset procedure to let the truck know the placement of each tire/sensor. The truck does not care if the spare is mounted on the rear door or roof or sitting in the cargo truck nor does it care if the spare has a sensor or not, it does not factor that into the monitoring system, it only considers tires mounted to the axles.

Phil