TPMS reads wrong pressure.

[oldhp3]

2021 80th Anniversary Gladiator, factory Bridgestone Dueler AT's on stock wheels. TPMS reads 38/39lbs, tires have 33lbs in them. 33lbs verified by 3 tire gauges. Can you reset/correct the TPMS ?

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[DocMike]

I have the same issue. I aired down to what I thought was 18psi. Turns out it was 11. heh.

2021 80th Anniversary Gladiator, factory Bridgestone Dueler AT's on stock wheels. TPMS reads 38/39lbs, tires have 33lbs in them. 33lbs verified by 3 tire gauges. Can you reset/correct the TPMS ?

 

[ShadowsPapa]

I hope it's a high-end dial type gauge. I just threw 2 of the other types away because they read low - one was the pencil type with the slider, the other was a fancy electronic gauge. Both went to the trash. Hard to imagine TPMS off as they register what the sensors in the tires tell them.
I'd air two of the tires down to say 20, see what the vehicle says after a few minutes (they don't read every second) and see if the ones you lowered actually show less after a few minutes. Test by not having them all the same, in other words.

I only trust my dial-type gauge - not the electronic ones, not the old style pencil pocket type.
My truck registers exactly the same as my trusty IH dial gauge reads. One tire is 1 pound lower and the dash shows exactly that, matching the gauge.

 

[oldhp3]

Intercomp Racing 0-60psi liquid filled gauge. It shows exactly what the TPMS shows on my 2019 Charger SXT. Not so on the Jeep. I'll go ask the dealer, I guess.

 

[ShadowsPapa]

Intercomp Racing 0-60psi liquid filled gauge. It shows exactly what the TPMS shows on my 2019 Charger SXT. Not so on the Jeep. I'll go ask the dealer, I guess.

Just checking because it's amazing how gauges can vary and some of the cheap ones I see used.

As far as I know there's no "adjustment" and having all 4 off like that........

 

[DocMike]

You make a good point. My ARB twin is on back order. So when I wheel I go to a tire shop after for a "free air check." Discount is like 1.5 miles from one of my favorite spots. I got my tires from them so I have zero issue with airing up with them. Last guy did use a pencil styled tester. Told me I had 11 and not 18. Most gas stations air pumps are just garbage from all the abuse.

I hope it's a high-end dial type gauge. I just threw 2 of the other types away because they read low - one was the pencil type with the slider, the other was a fancy electronic gauge. Both went to the trash. Hard to imagine TPMS off as they register what the sensors in the tires tell them.
I'd air two of the tires down to say 20, see what the vehicle says after a few minutes (they don't read every second) and see if the ones you lowered actually show less after a few minutes. Test by not having them all the same, in other words.

I only trust my dial-type gauge - not the electronic ones, not the old style pencil pocket type.
My truck registers exactly the same as my trusty IH dial gauge reads. One tire is 1 pound lower and the dash shows exactly that, matching the gauge.

 

[TrainMan]

I've tested a pencil style gauge, and a digital gauge. Both measure what my TPMS reads.

 

[ShadowsPapa]

I've tested a pencil style gauge, and a digital gauge. Both measure what my TPMS reads.

There are decent pencil styles like used decades ago by every gas station attendant, but some are just for "close enough" I do have one in my wife's WK2 as I figure she can use it and not have to look at a dial while it's pressed onto the valve stem. No trying to read a dial in an odd angle.

 

[oldhp3]

I found my old (20-25 yrs) Milton, made in the USA, pencil stick tire gauge. Still works great. It matches the TPMS on the Charger SXT and the JEEP!!!! Old is good.
The other Intercomp Racing gauge will get sent in and checked for calibration.

 

[ShadowsPapa]

Yeah, old is good............. 1916.............

But seriously, I have some older tools that still are measuring just fine. My dial type gauge was high-end in it's day (about 1982 - given to me by my then father-in-law). It's made to handle fluid filled tractor tires, etc. - and made in USA. It matches my vehicle readings perfectly. I have always kept it in the padded case when not in use, away from fumes, moisture, etc.


The above is kept in the same cabinet. I have never tried it as I value it more as a family antique than anything.

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