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Ford TPMS

Davexxxx

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Just curious. Anyone know what "significantly under inflated" means?

Went through the owners manual to see the parameters but they aren't listed. Nothing I can find in the sync either.

And no temp monitoring either.

Watched a couple vids about how to pair them after rotation or tire replacement but thats all I could find.
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Big Dog Daddy

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Just curious. Anyone know what "significantly under inflated" means?

Went through the owners manual to see the parameters but they aren't listed. Nothing I can find in the sync either.

And no temp monitoring either.

Watched a couple vids about how to pair them after rotation or tire replacement but thats all I could find.
I'm not sure what "significantly underinflated" means, but I have found that you can be 5 to 7% below the recommended tire pressures of 35 and still not get a tpms warning message.
So at 32.5 psi or higher you shouldn't see a warning.

As far as tire rotation is concerned, the truck will automatically re-learn the tire positions in a short drive after rotation. So no retraining is required. You can witness this by over inflating 1 tire before rotation and you'll see it show up in its new position shortly after. ;)
 

TexasTruck

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Just another misnomer about the TPMS system. I purchased new wheels, tires, and new OEM TPMS sensors (I like factory when available). The tire shop installed and mounted it all together on my truck. When it came time to marry the sensors to the truck, problems. They tried like hell to use their "black box" to program the new sensors. Their contraption kept saying it couldn't communicate or find the sensors.

They kept saying my sensors were bad and wanted to unmount the balanced tires and replace the sensors. I did not want them to tear it all apart and use their sensors. Turns out, their black box will only communicate with their aftermarket sensors.

When you buy new OEM TPMS sensors they are not programmed yet, they are "blank" if you will. Once they start rotating, they "wake up" and register with the vehicle.
 

Henfield

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Short of lowering the TP to see when it trips (it may be in the owners manual), I don't know. Another brand of car with the same 35psi number trips at 28.
 

{tpc}

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I think they also start talking after tires are inflated for the first time from no pressure, or the pressure almost drops to zero (stem removal, after a lot of air leaks out). But a lot of times the truck isn't awake to receive the signals, so you wouldn't see until you drive for a bit.
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