Reset TPMS?

[gaijin]

OK, what am I doing wrong? 2008, I had noticed the Spare (top in the list, it doesn't say which tire is which in the display) was getting kinda low. On a road trip for Tgiving - TPMS warning light comes on, and the annoying yellow warning triangle center dash. OK, fine, stop and check air - all look fine but went ahead and added some to all four drive tires (not spare) to about 37 hot. Figured I would get the spare later.

Later came, aired up the spare to ~33 cold. Attempted the procedure above, multiple times. No love. In fact, my light blinks for 60 seconds and stays on, indicating I need to go to the dealer. Really? I know the tires are good.

When I attempt the procedure - I can hold the (really freakin' hard to find the 1st time) TPMS reset button down indefinitely - no change in the blinking light - it blinks 60 seconds and goes solid. I.e. I can't tell that the button is working, assume it is not - since I can't verify 'blinks 3 times'.

It was "working" fine before the spare got low - and it WAS low - low 20's. I guess it could be coincidence it just so happened to get a TPMS system fault at the same - exact - time - but, come on.

I can't tell for sure, but if the TPMS sensors in your wheels are the originals from 2008, then a good guess is that you have one or more low batteries in a sensor(s). Low battery condition would be exacerbated by low temps in the winter. Dealer, or any good tire shop, should be able to check battery status of your sensors with a common TPMS tool. Since the battery is not a replaceable part, if a low battery is found, it means a new sensor must be installed and matched to your system.

I agree it is an odd coincidence, but both conditions (spare and bad sensor in a drive wheel) could be explained by low air temps.

HTH

Edit to add: I was typing while @CharlieS posted so... what he said.

 

[DecreedIt]

I can't tell for sure, but if the TPMS sensors in your wheels are the originals from 2008, then a good guess is that you have one or more low batteries in a sensor(s). Low battery condition would be exacerbated by low temps in the winter. Dealer, or any good tire shop, should be able to check battery status of your sensors with a common TPMS tool. Since the battery is not a replaceable part, if a low battery is found, it means a new sensor must be installed and matched to your system.

I agree it is an odd coincidence, but both conditions (spare and bad sensor in a drive wheel) could be explained by low air temps.

HTH

Ah, well - it was cold. What's odd is it came on while driving down the highway - not first fire up on the cold morning when we left - it sat outside the garage over night. And the spare was absolutely low 20's so an offender. At 161K it's on it's 5th set of tires AFAIK so old TPMS are totally possible - thanks! I'll get it checked out. Didn't think to add TPMS refresh to the baselining list, sheesh.