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Discussion Starter · #1 ·
We had this warning and checked the tire pressure, was 24 lbs. Set them to 28 lbs.
5 Days later we see the tire pressure warning.

Could this be a false reading?
Or should there be more than 28 lbs cold?
 

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2021 Venza XLE, 2018 Prius Prime Advanced
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jerryray said:
We had this warning and checked the tire pressure, was 24 lbs. Set them to 28 lbs.
5 Days later we see the tire pressure warning.

Could this be a false reading?
Or should there be more than 28 lbs cold?
Check the driver's side door pillar for recommended inflation pressures. I think 28 is ok but you should also make sure the car knows your intended pressure. You do this by inflating all the tires to the cold pressure you want and then resetting the tire monitoring ECU. There is a button sort of hidden in the glove compartment to do this. Check the owners manual for the exact procedure. After the ECU is reset and any tire drops more than 5 (?) lbs below that the warning light goes on.
 

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Discussion Starter · #3 ·
Thanks for the suggestion, Tried it several times and the light seems to remain on until the tires heat up on the parkway. I have them set to 28 lbs cold as the label on the door displays.

I followed the procedure and did see the tire warning blink 3 times.

The manual states the spare tire does NOT have a trasnponder chip. Perhaps this car has one by mistake.

I will check the spare, and see what the pressure is.
 
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