mbepic,

The same thought crossed my mind about the lifespan of the batteries in the sensors. C_Plunkett is correct that there is no way the batteries can be recharged. Since the batteries are non-replaceable, I assume that every few years we will have to replace the entire valve stem assembly.

C_Plunkett,

I think there are too many variables in the equation to assume that the sensors are transmitting all the time based on your experience in cold weather. I agree that something probably did not function as it should have due to the cold, bit it could have been the roller switch in the sensor (which caused it to transmit when it shouldn’t), it could have been the pressure sensor itself, or the TPM module in the Universal Transciever, or the Body Control Module (BCM), or something in the instrument panel. My guess is that something somewhere generated a trouble code and a scan might turn up some clue as to what really happened.

The service manual specifies 15 different Diagnostic Test Codes (DTCs) that can be raised by the TPM, including a TPS low battery code. I notice that the “B” schedule maintenance service calls for a check of the tires for damage and pressure. I am guessing that the dealer runs the Pressure Verification Test during “B” maintenance. If so, the low battery would be found then. I’m sure that our local Crossfire certified technicians can verify that.

When you sit in the cockpit and look around, all appears clean and relatively simple on the surface. But below the surface, there is a huge amount of complexity. Frankly, I am fascinated by all this gadgetry below the surface.