OK - two people and a couple of cases of beer and you hit that 400 lb weight pretty quickly.....

And the TPM will light up with a pressure loss of 4-5 psi in any tire. It does not have to be a sudden pressure loss. It would have been nice if it would indicate which tire was low.... That was discussed in one of the "I wish We Had A...." threads.

As I recall, there have been posts where the TPM was indicating low pressure, and by the time the car was driven to an air pump, the tire heated up and raised the pressure enough to trun off the sensor.

So all in all, it is still a good system.

8)