Greetings, I searched the site for the answer to my concern but did not seem to see it listed.
The other day when I started the car after work I was informed by the car's computer that I had a flat tire.
Well, I looked at all four and could see no different (which I guess should be expected with runflats).
I drove the care over to a nearby auto repair place (since I work in a downtown area and there are no gas or service stations with air) and they checked all four tires and found none of them flat but a few of them a few psi low. I should state that the weather changed dramatically that day from being in the 80's the previous day to being in the 40's this day.
The manual states that the Flat Tire Monitor "detects a pressure loss in a tire on the basis of speed differences between the individual wheels during a trip." It also stated that the FTM warning lamps come on when there is a flat tire or a major loss in tire inflation pressure. :?
Thankfully there was nothing wrong with any of the tires and I hadn't picked up a nail or some other debris, but I have to wonder why the system would go off since neither condition seems to apply.
I followed the instructions on the iDrive to reset the TPM and it has now been a week and the problem has not returned but am wondering if anyone else has had this occur and/or if it is something I need to bring to the attention of the dealer.
Does just a few pounds delta in tire pressure signal the computer that a tire is flat???
I should say that the car is now approaching 5K miles on the odometer, has been otherwise a wonderful ride and my overall U.S. mpg average is at 24.0 (according to the car's computer).
The other day when I started the car after work I was informed by the car's computer that I had a flat tire.
Well, I looked at all four and could see no different (which I guess should be expected with runflats).
I drove the care over to a nearby auto repair place (since I work in a downtown area and there are no gas or service stations with air) and they checked all four tires and found none of them flat but a few of them a few psi low. I should state that the weather changed dramatically that day from being in the 80's the previous day to being in the 40's this day.
The manual states that the Flat Tire Monitor "detects a pressure loss in a tire on the basis of speed differences between the individual wheels during a trip." It also stated that the FTM warning lamps come on when there is a flat tire or a major loss in tire inflation pressure. :?
Thankfully there was nothing wrong with any of the tires and I hadn't picked up a nail or some other debris, but I have to wonder why the system would go off since neither condition seems to apply.
I followed the instructions on the iDrive to reset the TPM and it has now been a week and the problem has not returned but am wondering if anyone else has had this occur and/or if it is something I need to bring to the attention of the dealer.
Does just a few pounds delta in tire pressure signal the computer that a tire is flat???
I should say that the car is now approaching 5K miles on the odometer, has been otherwise a wonderful ride and my overall U.S. mpg average is at 24.0 (according to the car's computer).
