I live in South Florida and we had our first Cool front last night. It went down into the low 50's high 40's. I keep my R56S garaged. I take it out this morning and I have a "Red" Flat Tire Warning light. At first I was "Oh Crap" :cryin:. I break out the tire guage and start checking the tires. They all seemed alitlle low at 32lbs. The sticker on my door jam advises 28lbs. So I fill them up and reset the warning light and thought "Crap" :cryin: I wonder if I have nitrogen in these tires . 1.) Has anyone experienced cold weather triping the tire sensors and causing a false warning light. 2.) Does my tires come from the factory with nitrogen in the tires? If so, will it make a difference if I add a couple of pounds of regular air to them. 3.) How many pound of air or nitrogen are you guys running in your Run Flats? Thanks in advanced AXO.
I have here in va, Reset the TPMS and if it comes back on after the reset in cold weather then it is bad.:arf:
It is not unusual for the TPMS to be triggered by a large temp drop. When the tires are filled when it's warmer such as in the summer and then a cold snap hits the pressures can drop a bit. I think the trigger for the TPMS is 4lbs.
Yup, same thing happened here. I was home for Thanksgiving driving my mom's R56, and the tire light went on when the temps dipped down to 26*F. The reset is a pain in the butt to find, but if you press the button on the end of the left stalk, you can cycle through the menus and find it.
Mine resets itself when they warm up or if I top them off.... Most retailers put green caps on the tire stems when they fill with nitrogen, as a warning. However, considering the air we breathe is about 80% nitrogen anyway, I find it hard to believe that it really matters. I would go with the air pressure recommendations in your owner's manual, rather than a SWAG....
Thanks for the quick replies. In my oringinal post I meant to say I topped them off to 38lbs as prescribed by the Manufacturer. Luckily I was able to find the reset with ease. I drove the Mini about 10 miles after the reset and so far all is well. Money is a little tight around holiday season and it would really sux to have to replace an almost new tire. I am going out of town for a week on business and almost want to reschedule because I wont be able to drive my Mini this week. I definately have the Sickness.
All you are doing when you reset is setting the normal pressures, then deviation from that is what triggers them.