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TPMS sensors backwards?

8K views 20 replies 7 participants last post by  CSIMME01  
#1 ·
So never experienced this before as I've always checked the pressure of my tires manually for years. When I took delivery of my 16 performance last week, noticed that the tire pressure monitor said my driver side tire was at 51 PSI and all the other tires kind of all over the place but nothing too off except the driver side front tire at 51psi. So I go in with my key and deflate it. It did not update on the cluster at all so I just assumed it would correct itself on the drive home. It didn't. I waited till the next morning when the tires were cold to get my tire gauge out and check all the tires. The computer still said around 50psi for the driver front tire. I go check it with the gauge and it's at 35 psi which is what's recommended by the sticker. I go the the passenger front tire which states 35psi on the cluster and when I go check it, it's at 50psi so it's backwards. I suspect that's what happened at the dealer, they kept inflating the wrong side because it was backwards on the instrument cluster.

Anyone experience this before and if so, how do I fix it?

Thanks
 
#4 ·
Each time you rotate the tires the TPMS locations need to be reset. You may be able to do it yourself using a suitable magnet. Google "2016 cadillac elr tpms reset procedure" or something close.
 
#6 ·
The TPMS sensor matching process is described on page 282 of the manual. It's essentially the same process as any other modern GM vehicle. Whoever rotated the tires last time just didn't bother to re-learn the sensor positions. Submariner409 is correct that you may be able to do it yourself, but if you plan to have the dealer rotate the tires for you, just get them to do it. If you're near the service bay, you can confirm they're doing it by listening for your horn to honk for each tire.
 
#7 ·
I have same situation, my tires all over the place. The only question I have is why gm didn't bother to make self correcting system, it's very easy to do on programming level, since we have steering wheel position sensor and abs sensors, it takes no time to find out what is what.... Idk.... Someone got too lazy I guess....

Sent from my Pixel 3a using Tapatalk
 
#8 ·
I have same situation, my tires all over the place. The only question I have is why gm didn't bother to make self correcting system, it's very easy to do on programming level, since we have steering wheel position sensor and abs sensors, it takes no time to find out what is what.... Idk.... Someone got too lazy I guess....

Sent from my Pixel 3a using Tapatalk
Seems like a trend with this car. Just make it look beautiful, who cares if anything makes sense! lol
 
#16 ·
There are vehicles which accomplish this today, and yes there are patents as well. Multiple ways to do this, but a common low cost / low complexity one is having a slightly smarter TPMS sensor that also keeps track of wheel rotation. By the TPMS sensor sending a rolling count delta since the last transmission, the car can compare wheel rotations with the hardwired ABS wheel pickup signals. After driving a little bit (not perfectly straight or flat), a match can be made and the sensor location can be pinpointed.

Tesla is one example of a car that can auto-learn wheel position. Those TPMS sensors also send tire temperature as well.

I wouldn't say the engineers were lazy, but just an evolution of the technology and a trade off between price and performance.
 
#17 ·
TPMs with temperature you say..
My name happens to be on a patent..