TPMS warning message then went away?

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Apr 20, 2023 | 12:15 PM

Truck Fun

Thread Starter

Mountain Pass

Joined: Apr 2023

Posts: 127

Likes: 20

From: NE Missouri

TPMS warning message then went away?

About a week & a half ago, the TPMS system showed a warning message about a possible fault. I had been driving 55-60 for 20 minutes. Then warning message went off but the low tire pressure symbol stayed on. Another 25 minutes of driving and then the truck wasn't driven for about 2 hours. No warning lights when I started it but again after about 20 minutes, the same process occurred. I've driven the truck a couple of times since then but have not received any warning lights regarding the system and/or tire pressure. Could this have been just a glitch for some reason? There is adequate pressure in the tires; currently running 60 lbs of the 65 max so the ride is a little softer and typically doesn't cause the low pressure light to come on.

Apr 20, 2023 | 12:37 PM

nydiver

More Turbo

Joined: Jun 2009

Posts: 661

Likes: 186

From: Lakeland, MN

SO the TPMS is set to 65 and has a 5psi window, you dropped just below the window when the tires warmed and expanded, then they cooled and tightened up raising the psi. Run 65psi or use something like Forscan to adjust the tpms down to 60.

Apr 20, 2023 | 01:52 PM

Truck Fun

Thread Starter

Mountain Pass

Joined: Apr 2023

Posts: 127

Likes: 20

From: NE Missouri

Didn't realize the window was only 5psi for a low pressure indication; thought it was a greater difference. However, even if the psi dropped below the 5 psi window, it should have just triggered a low tire pressure, not a fault with the system. Any thoughts on what triggered the two system fault warnings that hasn't appeared again?

Apr 20, 2023 | 03:12 PM

nydiver

More Turbo

Joined: Jun 2009

Posts: 661

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From: Lakeland, MN

That I'm not really sure of. In winter I put on the winter tires, they have no TPMS sensors. The dash normally bitches about low pressure, but occasionally, it will go to a TPMS system fault then minutes later goes back to low pressure. How is it low pressure if you have ZERO ability to even monitor???? To me I should have a fault full time all winter, not a low pressure. To me a fault should indicate I know the transponder I'm looking for, and its not there.

Apr 20, 2023 | 04:09 PM

cmcolfax

Mountain Pass

Joined: Jul 2009

Posts: 178

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From: Richmond, VA

I ran into a similar problem a few weeks ago on my 2015...

Aftermarket wheels and 35x12.50x18's and I was getting a Low Tire Pressure Warning.

I used to run 50psi in the 35's on my Suburban so that is where I set them on this truck.

Apparently the PCM / TPMS didn't like that. Bumped them up to 55psi and the warning went away.

Apr 20, 2023 | 04:39 PM

Truck Fun

Thread Starter

Mountain Pass

Joined: Apr 2023

Posts: 127

Likes: 20

From: NE Missouri

Quote:

Originally Posted by cmcolfax

Did you also get the system fault warning or just the low tire pressure warning?

Apr 21, 2023 | 12:03 PM

ShelbyHauler

Laughing Gas

Joined: Dec 2017

Posts: 1,002

Likes: 641

From: Miami, Fl

On my trip last month from Miami to PigeonForge, I got the system fault warning several times. Not a low pressure alert. Same as described, TPMS light came on with a chime and a message in the center display about the TPMS Fault. Pressing the OK button silenced the chime and cleared the display but the TPMS light stayed on for a while, then turned off.