I mentioned this in my build thread, but in the interest of having this more easily found should anyone have the same issue I'm posting a thread here.
So, a couple weeks ago my TPMS light was flashing at me while I was stopped at a red light. It flashed for about 30 seconds or so and then disappeared. The odd thing was that I noticed my blinker indicator light on the dash was not blinking. I did not have a car in front of me or anything along those lines to see a reflection and determine if the actual blinkers were not blinking as well.
Then this past saturday when I was driving home from work, the TPMS light was going bananas on me. Blinking, staying on, turning off, etc. According to the manual the TPMS light should work in one of two ways. Either it comes on and stays on, indicating a tire out of range, or it blinks for a minute then stays on, indicating a problem with the system itself. The light was not behaving in either of these ways, but more concerning was that again my turn signals were not working whenever the TPMS light was either blinking or on. This time I was able to see reflections of my car and confirmed that the actual lights were not blinking.
I got home and checked tire pressures, and they were high probably due to the warm weather that day. I let a few psi out of all the tires and haven't had the TPMS light reappear since.
I called my local dealership and they say they have never heard of this happening, but that it is not normal operation. I will have to get this fixed as I have a set of winter wheels/tires and was planning on ignoring the TPMS light rather than pay to reset the system twice a year. Obviously if I can't use my turn signals when that light is on, though, that creates a problem.
So where we stand now is that I am going to put on one of the winter wheels after work to see if that replicates the problem (TPMS light on and blinkers not functioning). If so, I'll set up an appointment with the dealership so they can look at the car with the problem successfully replicated.