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Which would you trust: the psi indicator, or the alert?

Undertoad

Member
Sep 19, 2020
8
3
King of Prussia, PA
trust.jpg


Background: A few days ago I had a flat tire, left rear, ran over a screw. Yesterday roadside assistance came and patched it, and set all four corners to 45psi. Got in this morning and the car was still alerting that a tire was low, until it had time to measure psi and show 45s across the board. But after ten minutes of rolling down the highway, the numbers rising a little at highway driving temperature, the alert came back on.

I didn't sense any problem, definitely didn't hear the tire shredding away at 70mph, and decided - as a general software sort of guy - that the psi measurements were way more likely to be the accurate indicator. The alert software just may not have gotten the word that tire pressure was good.

In addition, I had a software update (to 2021.4.18.2), which happened while the tire was flat, which might have confused the data...

I pulled over when it was comfy to do so. Tire was fine, PSI measurement was correct. I rebooted the car and haven't gotten the alert since.
 

Shelburne

Member
Mar 9, 2021
176
132
Shelburne Falls, MA
I hate those damn tire pressure sensors. Not just on my M3 either. I had problems with them on two different Volvos as well. Frankly, I wish there was an option to disable them. I am more than capable enough to check each tire with a tire pressure gauge, as are most people. The TPMS is just one more unnecessary thing that can, will go wrong, and cost you time, money and aggravation
 

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