Whether it's 10% depends on how the sensor measures pressure. If it's
measuring relative pressure to the atmosphere (the same thing you measure
with your gauge), then I agree it's about 10%. If it's measuring actual
pressure, then it's more like 20%.

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thanks for all the input...When I get back home to CA, on to Harbor Freight
it is!!

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HT,

Have you looked at the tpms units on the Sonatas for 08 (and most others I
assume)? It appears to me that they have a lithium cell (CR2032) and I asked
the service department on the servicing of these things. I guess I wait
until the TPMS light comes on? One of the techs suggested I go to nitorgen
(don't shoot me, just stating facts!) as an alternative to keep these things
rust/corrosion free. Why not use the ABS signal as an indicator? The
circumfrence of a tire changes a with it's pressure, right?


--
Steve, 2008 Sonata SE

http://lasvegas.craigslist.org/rfs/463926931.html

 

I've only had a couple off and haven't paid much attention. I don't think
the battery is replaceable. If you have a system which tells you which
tire is low (not sure which cars have which system), there is a
transmitter in the fender well which sends a radio signal to turn on the
TPMS sensor. I.e., it's off when needed, saving on battery life.

GM actually used a system which used the wheel speed. It proved
troublesome. Rotating the tires would cause the tire pressure lamp to
illuminate a few miles down the road.

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"hyundaitech" <notpublic@not.public.com> wrote in message
news:57a1d738c77f3516c44d01c1700b7676@localhost.ta lkaboutautos.com...
> I've only had a couple off and haven't paid much attention. I don't think
> the battery is replaceable. If you have a system which tells you which
> tire is low (not sure which cars have which system), there is a
> transmitter in the fender well which sends a radio signal to turn on the
> TPMS sensor. I.e., it's off when needed, saving on battery life.
>
> GM actually used a system which used the wheel speed. It proved
> troublesome. Rotating the tires would cause the tire pressure lamp to
> illuminate a few miles down the road.
>

But, at least on my GM model, you can just press the reset button so it can
adjust itself to the new position/condition.

 

Thanks HT. I assumed it would be replaceable by the photo of it I have seen.
That makes sense though, kinda like WOL (wake on LAN).



"hyundaitech" <notpublic@not.public.com> wrote in message
news:57a1d738c77f3516c44d01c1700b7676@localhost.ta lkaboutautos.com...
> I've only had a couple off and haven't paid much attention. I don't think
> the battery is replaceable. If you have a system which tells you which
> tire is low (not sure which cars have which system), there is a
> transmitter in the fender well which sends a radio signal to turn on the
> TPMS sensor. I.e., it's off when needed, saving on battery life.
>
> GM actually used a system which used the wheel speed. It proved
> troublesome. Rotating the tires would cause the tire pressure lamp to
> illuminate a few miles down the road.
>
> --
> Message posted using
> http://www.talkaboutautos.com/group/alt.autos.hyundai/
> More information at http://www.talkaboutautos.com/faq.html
>