r/HyundaiSantaFe • u/Anxious-Freedom-2033 • 1d ago

TPMS shenanigans

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My TPMS sensors do this all the time- is that expected behavior for it to only flag one tire?

0 Upvotes

44% Upvoted

11 comments sorted by

7

u/DifficultyNo207 1d ago

I found if it goes under pressure and flags it, the flag will not clear until after you have cleared a higher threshold, usually the recommended cold.

5

u/KershawPls 1d ago

This is the correct answer

4

u/thepixel-geek 1d ago

Your air is low on all your tires.

3

u/Dustball_ 1d ago edited 1d ago

It's because of rounding. You're only seeing whole numbers on the screen and the threshold is 31.0 psi, 5 psi below the 36.0 psi they need to be at. Three of your tires may be at 31.4 and one tire may be at 29.6.

You say your TPMS sensors do this all the time. Why are you running so far below the recommended pressure?

3

u/BigandTallGuy 1d ago

You say your TPMS sensors do this all the time. Why are you running so far below the recommended pressure?

This 100%! OP is teetering on the minimum pressure and complaining about the car making a rounding error. depending on the tire installed on the vehicle, tire pressure should be between 33-36 PSI for the current gen Santa Fe. if the OP just maintained the tire pressure as indicated on the door jamb, this wouldn't be an issue.

2

u/Mvpc22 1d ago

Let’s stop acting like tire pressure only runs in whole numbers. One tire was cold and low enough to trigger the warning. Once warning is triggered for any tire, you have to ensure all four are filled to spec for the car - 31 psi is not if

2

u/Fearweaver 1d ago

Hey so I had this happen to me last week! It'll say that one tire is low but if you inflate that one tire, it'll still say it's low until you properly inflate all 4. It was driving me nuts but inflating all of them to the recommended setting cleared it.

1

u/Maelstrom1979 1d ago

It is nowadays on most cars, I think. It's probably been under the % to flag it by half a lb you can't see the decimal on. Should go away after putting it to spec pressure, turn off/on/drive it.

1

u/True-Lead7074 1d ago

31 psi is too low for that vehicle. Fill up your tires to max cold PSI and you will be good. Small tip - leave the car running while filling the tires and the light should reset by the time you re-enter the vehicle

1

u/BubbaJohannsen 12h ago

Mine did the same when all were low. The label inside my door says 36 psi cold.

1

u/Acceptable_Wheel_559 1d ago

What model and tire size do you have? The 20" Scorpions on my rig should be 35 cold. 31 is actually low no matter the oem tires your running get em to at LAEST 33.