Tire Pressure warning at 35psi?

[Fordified1]

Mine doesn’t give any warning unless they vary 2psi from tire to tire. Even when aired down to 20. Around home I run 30psi. I air up to 35 when hitting the highway for a long trip. When one was 2psi lower it kept giving the low tire warning until I equalized them.

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[BoverW]

The default low pressure warning logic is not a one-threshold setting.

If warning is triggered, (any tire <30), you must air up to 35 to clear it. Due to rounding like Brian said, better to air up to 36.

Once it is cleared, you can lower it to 30 wo trigger any warning. Any cold pressure >=30 is fine.

So it has two thresholds ( a 5 psi dead zone). One for each direction.

 

[crenca]

but someone decided to use many lines of programming when a couple would have worked.

When your in some over crowded and smoggy Asian city programming for 1.5 pennies on the dollar, you have to do something to justify your time logged that week

 

[23_Badlands]

When I'm off-roading and messing with inflation, the light doesn't usually turn on until I'm under around 30 psi, and doesn't turn off until I fill up to 36. I recommend bumping them up 36, and I bet it turns off.

Ditto. Have a '23 SAS with OEM tires. Recommended tire pressure based on door jam sticker is 39 psi. Try to run them around 33 psi, otherwise, get excessive center tire wear. TPMS activates around 30-31 psi---usually happens on a cold morning. Once it activates have to inflate to at least 36 psi (usually do 38-39 psi just to be safe), drive around until the TPMS resets, then deflate back to 33 psi. I've had to do this 3 or 4 times over the past year. PIA.

 

[Sitruc_btb]

Ford TPMS is goofy. I air up the tires with mine at idle and watch until the tires are good, then drop the pressure where I want them.

I'll have a tire at maybe 31psi, another at 32psi, and the 32psi tire will be low.

 

[ksdon]

Our Sasquatch with Micky Thompsons have shown tire warning for 2 plus years. 28-30 psi sometimes allows us to drive for a day or so without any warning once we clear the warning by doing an increase in PSI as mentioned above. We also get one tire that might clear for a while while the rest show low....all are set at the same PSI. It is goofy.

I do not have forescan and no tire shop in my area is willing to set my warning notice at 30 psi.
We just check the pressure often and live with it.

 

[D_Andy]

The low pressure is triggered at 34-35psi but takes a couple psi high to clear it. Try 37 psi to reset and then you can air down if you wish. It will be re triggered at 34-35psi

 

[AZMikeL]

I can verify that airing up to 36 will generally clear the warning. 35 will or won't - I suppose it's a rounding issue.

Gonna Forscan that down to 32 anyway as I like to run 35 around town as 39 is too bouncy.

 

[Bee Bop]

@Ducati1098 My 21 non sas BL say 39 PSI optimal cold Tire Pressure.

 

[Ducati1098]

@Ducati1098 My 21 non sas BL say 39 PSI optimal cold Tire Pressure.

Interesting. Maybe it was never actually lower and I was just imaging things lol

 

[Lucky Nut]

Once it is cleared, you can lower it to 30 wo trigger any warning. Any cold pressure >=30 is fine.

Any way to do this without Forscan?

 

[Blackcat]

I have a slow leak and usually get the warning around 28 psi. It goes away as soon as I air back up to at least 32. I don't even have to drive to get it to reset.

 

[userdude]

Any way to do this without Forscan?

I'd say some whiteout or tape over the low pressure icon, but Ford helpfully throws that warning up each startup...

You might laugh, but I saw some paper taped over a tv screen last weekend where I guess they don't offer some items on the menu anymore? I suppose someone forgot the login to the website where they manage the menu items... lol

 

[Brian_B]

Any way to do this without Forscan?

Probably some way in FDRS but that is a higher bar to clear than Forscan.

No way I know of short of that. There are a few “custom programmers” that you can plug into an OBD port and do specific settings changes - maybe one of those? But I don’t know of one off hand

 

[BAUS67]

Gawd I hate the person that sued Ford over their Exploder tires blowing out.

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