Had the misfortune to pick up a rather large screw in one of the front tyres the other day, resulting in a puncture. As the screw was firmly embedded, there was no sudden deflation and I expect it might even have taken a couple of days to deflate to the point where it was visibly obvious. My wife mainly drives the car and she hadn't noticed anything wrong, but more concerning was the absence of any complaint from the TPM. I had recently adjusted the tyre pressures over Xmas and reset the TPM so it should have worked or am I missing something?