2005 Toyota Sienna - tire pressure warning light after replacing one tire

[msabat...@yahoo.com]

Recently, the right rear tire on my 2005 Sienna got a puncture, and
since it was not pluggable, got is replaced. So there are now 3
original (1.5 years) tires and one new tire. Now the tire warning
light comes on every time I drive. It comes on after a few minutes of
driving and stays on.
Is this because the new tire makes the other 3 slightly off the
correct air pressure? Has anyone else experienced this?
I checked the air pressure, they are all about equal.
Thanks
Mark Sabatini

[Mark Olson]

A little googling suggests the system works not by measuring pressure
but by using the ABS sensors to measure wheel revolutions. The replacement
tire is not the same diameter as the other tires, which fools the system
into thinking you've got one or more low tires.

[Scott Dorsey]

No, the issue is that the diameters are different. You need to change
tires in pairs. Replace the tire opposite of the new tire, and put a
rim on it. Now you have a full-sized spare, better handling, and the
light won't come on.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[G Mulcaster]

A normal situation after changing a tire. The new tire has a slightly
different diameter than the previous tire and no longer compares to
the data held by the tire warning system.

Given the tire pressures are correct, you simply need to reset the
computer. Check your owner's manual, but the reset goes something
like this:

Turn key on but don't start engine. Observe the tire light flash then
stop. Press the reset button until the light starts flashing again
then stops. That's it.

Gary (2002 Sienna)

[box...@sasktel.net]

if its an all wheel drive, you should probably replace all 4 at once,
or at least in pairs. i don't know if that has anything to do with the
warning light but it will be safer to drive.

[Comboverfish]

Ensure all tires are 35 psi (recommendation for loaded Sienna, 32 psi
in back if not driven with people or cargo, but 35 is fine too), then
use the tire pressure monitor reset button to "relearn" the new tire
diameters and pressures. The tire pressure monitor system description
and reset procedure is in your owner's manual between pages 196 and
200.

It probably won't be an issue using tires of two different wear
levels, but there is always going to be some binding on the drive axle
in such a case. The rear would be the best place for the new tire,
but since you need to eventually perform a rotate, it's a moot point
anyway. I always suggest replacing tires in pairs if the tread
differential is too severe.

Toyota MDT in MO

[philthy]

read the onwers manual
there might be a way to reprogam the tire pressure warning system if not
then a good asain scantool is needed

[Marsh Monster]

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i was gonna say that.......exactly.

i was

yeah i was.........

ok......so i didn't know....fk it.

:)

~:~
marsh
~takes a sip of his shroomjuice.....wonders if there's anything...
Fish doesn't know.......~
~:~