Cold Weather causing TPMS problems/

[paulsaveo]

I got into my car this morning, started it up and everything was normal. Start driving and my TPMS begins flashing. Double checked the manual, and realized I have a malfunction in my system somewhere. I drove to the dealer, restarted my car, and drove a little more. Everything was fine, and I have not had the error since. Took my car to wal-mart to have them look at a tire that has been suffering a slow leak. They just reset the bead and didn't charge me, but did see a small bend in my rim that I will fix later.

Now I drove from wal-mart to my grandparents across town with no problems. I leave there house to go back to mine, still in the same town, and my tpms light is telling me I have a low tire. No big deal it's just really cold tires. Get to a red light after a about 10 mins on the road and restarted my car to reset the tpms. Still on. Same when I arrive a couple minutes later.

I have already spoken to the dealer about the malfunction light, and he believes I may have a sensor going out on me. $75 for a new one through them. But they will have trouble diagnosing it until the sensor fails completely. So I'm stuck with this annoying orange light on my dash until I can come up with probably $120 for the total work bill, and the thing fails completely.

Has anyone else had trouble with there TPMS in the cold weather?

TPMS are set with certain thresholds, if factory spec for your tires is 32 psi, when you lose 7 to 10% (roughly 4 or 5psi) of your pressure the light will come on. If you understand the molecular structure of air, when air is warmed up it will expand generating more psi, when air cools, it contracts, dropping tire pressure. a flashing light is an indication of the control unit not communicating with 1 or more sensors. The dealership I work at, we use nitrogen in our tires, the molecular structure of nitrogen does not expand and contract like air with temperature change. In 2 years of my wife driving her 09 corolla, her tire light has only come on once and that was due to her picking up a nail and losing air (nitrogen). I hope this gives you a little more info on your TPMS. if you do have a faulty sensor and you are out of warranty, in addition to the cost of the sensor, once a new sensor is installed, it has to be programmed to the control unit as well

[AveoJunk]

OK, I took a lot of crap from AveoSS for my screen name, but here is another reason why. Like I said before I have had tons of problems with the Aveo and different sensors and CELs etc and hard times from the dealership to fix it. Currently I am living with a CEL. Well now on the way to work my TPMS starts flashing for a minute, then stays lit. OK, get to work and park it. After work, no light, drive for ~25 miles, same thing, light flashes, then stays lit. This has been the same thing for the past four days. So I find myself googling this and low and behold here I am, at this thread. My dash looks like a christmas tree with all of the lights. I am told this is a malfunction in the system and of course it is out of warranty, so this light will stay on too. So basically I am stuck with this car until it dies because I can't sell it or trade it with all the lights, can't pass inspection with a CEL, don't want to pay a dealerships hundreds or even thousands of dollars to fix a car I will never get my money back from.
Thought I would share my experience for others in case they have the same problem.