How accurate is the onboard TMPS PSI readout?

[DirtyLuke]

Mine are always about 2-4 psi high, but very consistent against each other. If I'm targeting 35psi, three of them read 39, and one reads 30... I've just recognized a leak. So it's still a very useful display.

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[Mountainbiker]

I use my tires at 33 psi however the TPMS report 26 to 27 on different wheels. Of course this lights up the tire ! image on the panel. It drives me crazy! I increased tire pressure to 40, and the car only shows 29 from the TPMS. I will buy new TPMS sensors. Any suggestions? On Amazon I found these
https://www.amazon.com/dp/B07K9MBB3T?pd_rd_i=B07K9MBB3T&pf_rd_p=671e3290-c571-4714-837c-b3b56f1c4d91&pf_rd_r=B0MYN91AYFRZ78NP4AB6&pd_rd_wg=K6SoK&pd_rd_w=s4GnB&pd_rd_r=0e92cdc1-1f33-4d77-8798-7baef45867cd&th=1

 

[davidg4781]

I use my tires at 33 psi however the TPMS report 26 to 27 on different wheels. Of course this lights up the tire ! image on the panel. It drives me crazy! I increased tire pressure to 40, and the car only shows 29 from the TPMS. I will buy new TPMS sensors. Any suggestions? On Amazon I found these
https://www.amazon.com/dp/B07K9MBB3T?pd_rd_i=B07K9MBB3T&pf_rd_p=671e3290-c571-4714-837c-b3b56f1c4d91&pf_rd_r=B0MYN91AYFRZ78NP4AB6&pd_rd_wg=K6SoK&pd_rd_w=s4GnB&pd_rd_r=0e92cdc1-1f33-4d77-8798-7baef45867cd&th=1

That's a big difference! Are you sure your tire gauge is accurate?

I can't find the accuracy of the one I have but I've seen some that say like +/- 1 lb between 5 and 75 lbs.

 

[Bucko]

Drives me crazy. I have a compressor with a digital gauge. I like to run 35psi in my Goodyear Wranglers. I get all different readings from the TMPS on board and the Ford Pass app. I can never get all 4 tires to read the same PSI. Usually get 3 out of 4

My guess is that these TMPS monitors are good to let someone know when they have a tire going flat.

My neighbor was telling me the other dat that he scheduled an appointment to have his truck aligned, as it was pulling to the right. I looked over at his truck, and noticed his right front tire was almost flat!

Apparently, his truck was older and not equipped with TMPS, as I think it became mandatory sometime in 2006 or 2007 to have it on all vehicles.

For cases like my lazy neighbor who can't walk around his vehicle once in awhile, TMPS may be a good option, unless he also ignores dash warning lights.

 

[Barry S.]

I use my tires at 33 psi however the TPMS report 26 to 27 on different wheels. Of course this lights up the tire ! image on the panel. It drives me crazy! I increased tire pressure to 40, and the car only shows 29 from the TPMS. I will buy new TPMS sensors. Any suggestions? On Amazon I found these
https://www.amazon.com/dp/B07K9MBB3T?pd_rd_i=B07K9MBB3T&pf_rd_p=671e3290-c571-4714-837c-b3b56f1c4d91&pf_rd_r=B0MYN91AYFRZ78NP4AB6&pd_rd_wg=K6SoK&pd_rd_w=s4GnB&pd_rd_r=0e92cdc1-1f33-4d77-8798-7baef45867cd&th=1

First step is take it to your dealership service department and have them check it out. Cars come with warranties. Don't spend money unnecessarily and risk voiding the warranty by installing parts from Amazon.

 

[Chadwick]

My guess is that these TMPS monitors are good to let someone know when they have a tire going flat.

My neighbor was telling me the other dat that he scheduled an appointment to have his truck aligned, as it was pulling to the right. I looked over at his truck, and noticed his right front tire was almost flat!

Apparently, his truck was older and not equipped with TMPS, as I think it became mandatory sometime in 2006 or 2007 to have it on all vehicles.

For cases like my lazy neighbor who can't walk around his vehicle once in awhile, TMPS may be a good option, unless he also ignores dash warning lights.

For my older vehicles without integrated TPMS, I have purchased this system from Amazon:

https://www.amazon.com/gp/product/B08LK3MDC3/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

-Keith.

 

[jhnvan]

I did the opposite, i took my tpms sensors off the car with the wheels it came with. New wheels don't have sensors because i offroad and don't want a sensor knocking around in the wheel if it gets broken. My screen has 0s all around. Perfect every time haha!

 

[kshaw]

I just reduced air pressure on my tires to 34 PSI with a digital measure. TPMS shows 34PSI on right side and 33 PSI on left side. So its pretty accurate.

 

[Barry S.]

I also check mine after every "The Works" service at the dealership. Usually, they don't even check the pressure, or if they do, my Escapes' 35psi tires are all over the place from 30 to 37.
I took it in once for "The Works," knowing the tires were low, and after the service all 4 tires were still low. I don't believe that this dealership did any of the supposed safety checks included with "The Works."

Did you tell that to them? If done politely, they may actually accept it as constructive criticism. I've found that businesses usually take criticism quite well. Management often has no way of knowing their shortfalls unless customers inform them. In my earlier corporate life, one of the departments that reported to me was Customer Service. My ability to improve their performance was a result of listening to customers that took the time to call me and politely express dissatisfaction.

 

[RushMan]

Did you tell that to them? If done politely, they may actually accept it as constructive criticism. I've found that businesses usually take criticism quite well. Management often has no way of knowing their shortfalls unless customers inform them. In my earlier corporate life, one of the departments that reported to me was Customer Service. My ability to improve their performance was a result of listening to customers that took the time to call me and politely express dissatisfaction.

Yes, I did tell them that they did not properly perform the Safety Check that is part of Ford's "The Works" routine service that I paid for, and that I reported it to Ford's customer service.
Poor service doesn't earn a respectful response, but instead a firm one.
Poor service is disrespectful to the customer.
I expect to get what I pay for.

 

[Maxwellian]

Mine are always within a psi of my digital gauge and compressor if I fill up in the shade and the car has been parked. Things vary a bit more when filling up hot or even warm tires.

 

[TNFurb]

So since this thread is pretty recent I thought I would ask this question rather than starting an entirely new thread about tire pressure. If any of the moderators feel this should be its own thread feel free to move it. Several have mentioned that their tires came from the factory over inflated. Mine were too by about 3-4 lbs over the the recommended 33. I have an Outerbanks and the Michelin tires. I don’t do any off roading. So my question is twofold, why would the factory overinflate to begin with? And is anyone intentionally keeping their tires at 35-37 psi for some reason? Better gas mileage maybe? I know the risks of over inflating and under inflating. But how much is too much? Just interested in others opinions.

 

[Dude]

So since this thread is pretty recent I thought I would ask this question rather than starting an entirely new thread about tire pressure. If any of the moderators feel this should be its own thread feel free to move it. Several have mentioned that their tires came from the factory over inflated. Mine were too by about 3-4 lbs over the the recommended 33. I have an Outerbanks and the Michelin tires. I don’t do any off roading. So my question is twofold, why would the factory overinflate to begin with? And is anyone intentionally keeping their tires at 35-37 psi for some reason? Better gas mileage maybe? I know the risks of over inflating and under inflating. But how much is too much? Just interested in others opinions.

To prevent flat spotting..,

“Many OEM's will ship their cars from the factory with much higher than normal tire pressures. This helps to prevent flat spotting which can happen in any tire when a car that sits in one place for a long time, like on a transporter or in a storage lot.”

many auto service centers will set your 33psi tires to about 35psi so the tires won’t fairly quickly need air added.

my tires filled to 35-36psi (when cold) last at that psi only several weeks before I see them dropping to 34psi

 

['Cause]

Glad I found this thread !!!

Only had mine a couple days, not many miles on it yet but did notice the 'hard' ride and feedback I get from the road !
I was curious as to the pressures so I put my digital gage on them this morning.

WoW... I was shocked to find two at 44, one at 46, and one at 43...
I am in AZ, cold is not an issue here, but we do see ambient Temps at 100-115, cant imagine what the tires are seeing after a Highway Drive !!!!

I'm going down to 32Psi, taking an hour or so Highway drive and check them!

43++ cold is insane!

Ken
RLTW

 

[Dude]

Glad I found this thread !!!

Only had mine a couple days, not many miles on it yet but did notice the 'hard' ride and feedback I get from the road !
I was curious as to the pressures so I put my digital gage on them this morning.

WoW... I was shocked to find two at 44, one at 46, and one at 43...
I am in AZ, cold is not an issue here, but we do see ambient Temps at 100-115, cant imagine what the tires are seeing after a Highway Drive !!!!

I'm going down to 32Psi, taking an hour or so Highway drive and check them!

43++ cold is insane!

Ken
RLTW

You probably can add the tire pressure display to the scrolling list of instrument cluster telemetry items
That way you can check it without getting out of the car and from the FordPass App

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