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misslindseysue · 11-07-2007, 01:01 PM

The TPMS is ABS based. It takes some driving to set it so it can see a difference in the wheel speed = rolling diameter. So if you had a flat when you got in the car, it wouldn't have set right away - not until you drove a few miles at a fairly consistent speed.
Active TPMS (which is now required on new cars) would have told you that you have a flat right away, but that requires (expensive) sensors in each tire.

11-07-2007, 01:01 PM	#4
misslindseysue MINIac Join Date: Oct 2005 Location: Brighton, MI Posts: 1,030	The TPMS is ABS based. It takes some driving to set it so it can see a difference in the wheel speed = rolling diameter. So if you had a flat when you got in the car, it wouldn't have set right away - not until you drove a few miles at a fairly consistent speed. Active TPMS (which is now required on new cars) would have told you that you have a flat right away, but that requires (expensive) sensors in each tire. __________________ Moved on to smaller and better things.