just a pain in the *** really to find out which one. I had a similar experience, except mine are on with the OEM sensors on the oem wheels. I'm inclined to think the batteries might be going dead in them or something? Mine go on and off all the time, my new ones work like a charm. 4 more months of winters I have become so indifferent to it now. But whoever said check the spare, you're a genius. I'm going to check mine tongiht. I hate tpms with a passion haha.

 

Well, I was right. It was a faulty TPMS sensor causing my problems. "Faulty" might be putting it lightly.

What a TPMS sensor looks like:



And what came out from inside my tire:



A few days after I posted this thread I also noticed a sound coming from my driver's side rear wheel, which could best be described as a marble rolling around in a tin can. Putting 2 and 2 together, I theorized that one of my iForged TPMS adapters broke (perhaps after hitting a nasty winter pothole), so that the sensor was just rolling around inside the wheel. Turns out after unmounting the tire, this is exactly what happened. Here's what my failed TPMS adapter looks like:



And what it's supposed to look like:



So now I need to decide if I want to replace the bracket, try a different TPMS solution, or drill into my wheels...

 

Daamm Brian, destroyed your shieet!