Tire Pressure TPMS gauge display reads high psi - Kia Forum

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post #1 of 12 (permalink) Old 05-15-2019, 08:34 AM Thread Starter
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Tire Pressure TPMS gauge display reads high psi

I have a new 2019 Kia Sorento LX with about 950 miles on it. Since day 1 the tpms pressure gauge on the display in front of the steering wheel shows 46-47 psi in each tire. I thought this was very high as the door shows 34 psi per tire on the side of door frame.. Dynapro hp2 oem tires show max 51 psi.

I used a tire pressure gauge to read the psi in the tires and they show 35 psi.. i tend to trust that more than the pressure showing on the steering column but am unsure why it would show 10-11psi more on the display.

I would think nitrogen or air would still read same psi regardless for the tpms pressure monitoring system.

chris

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post #2 of 12 (permalink) Old 05-15-2019, 09:14 AM
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take it the dealer and let them check it out. 10-11 psi is far outside normal variation
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post #3 of 12 (permalink) Old 05-15-2019, 09:15 AM Thread Starter
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thanks.. i called them and they said pull it in and they will check it.. hope they put nitrogen back in and it apparently cost extra per the car sticker when i got the kia.

i trust my tire gauge more as ive used it for years on all my cars..
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post #4 of 12 (permalink) Old 05-15-2019, 11:39 AM
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Something is wrong, my 2 digital gauges and the TPMS measure within 0.5 PSI of each other. My TPMS have proven to be very accurate.
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post #5 of 12 (permalink) Old 05-15-2019, 12:44 PM Thread Starter
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thanks.. i will go by kia saturday and hopefully they can tell me what is wrong.

I checked during lunch today and all tires on the display show 44 cold, but reg gauge on tire valve shows 35, weird indeed
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post #6 of 12 (permalink) Old 05-15-2019, 02:05 PM Thread Starter
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I dont see a way to edit this thread.. some updates:

I had a crappy manual tire gauge.

I got a nice digital tire gauge and used it on all 4 tires. Showed 45.5 psi of pressure.

I read on this same forum that dealers have their cars shipped with over inflated tires for the trip overseas etc.

The forum post said , the dealer is supposed to set tires to normal inflation on the checklist before giving the car to the customer.

Apparently mine didnt.. i thought 47 psi was high, but i wasnt questioning till today when i thought about comparing with a tire gauge.

So, I lowered all 4 to 36.5 psi, so i could see what the tmps display showed and go from there.

Door panel shows 34, and some people have recommended running 2 psi more in front tires as car is heavier in front?? unsure of that.

The local kia svc guy said he runs 4 psi over the psi pressure listed on door frame.

so hopefully this makes the tire/car/ride smoother and doesnt use up my tires quickly, only 950 miles.. hopefully i caught it in time to not cause much issue.

cj
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post #7 of 12 (permalink) Old 05-15-2019, 03:51 PM
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Originally Posted by ceejaay View Post
<Snip>
Door panel shows 34, and some people have recommended running 2 psi more in front tires as car is heavier in front?? unsure of that.
<Snip>
cj
You're over thinking this issue. The manufacturer recommends 34 psi. They knew the engine was in front when they did the specs. Set them at 34 psi cold. Congratulations on getting an accurate tire gauge. The TPMS is very accurate and can save you a lot of time doing routine pressure checks.

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post #8 of 12 (permalink) Old 05-15-2019, 06:14 PM
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I use the dash reading to let me know if one tire is losing air more than the others. As long as it shows they are all within a lb of each other and around 36-38 while driving, I feel they are good.
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post #9 of 12 (permalink) Old 05-16-2019, 11:29 AM
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My tire guy, who is very experienced and has been in business for over 30 years says that the manufacturer recommended pressure is too low which sacrifices safety, fuel economy, better tire wear and performance for a little better ride comfort. He says for the Sorento, pressure should be 41 psi.

Here is a very interesting article and tire pressure calculator based on the max psi listed on the sidewall. My tires have a max psi of 51, with a recommended pressure of 41 psi.

Tire Pressure Calculator - MilesGallon.com

Interestingly, police fill their tires to the max pressure or even higher.

Last edited by JohnH123; 05-16-2019 at 11:33 AM.
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post #10 of 12 (permalink) Old 05-16-2019, 11:57 AM
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There's really only one good all-around tire pressure ... it's whatever creates the flattest footprint of the tread on the road surface, providing the maximum amount of contact. From there, you get good tread life and decent steering performance under various conditions. That perfect pressure is in part determined by vehicle load at any given time.

Under inflation creates a wallowing effect - slow feeling steering, a lack of responsiveness. It also causes faster tire wear on the outside edges of the tire. It's also not great for mileage.

Excessive inflation causes more responsive feeling steering, but at the limits, will also cause more 'push' in the front due to lack of overall traction. Ride on uneven surfaces suffers. It also wears out the center of the tire faster. Yes, you can get better mileage, but at the cost of tread life and maximum steering performance.
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