"Money saving?" for a passenger vehicle? No, not really unless one paid
no attention otherwise it's possible. They are a safety feature that is
worthwhile imo; again if paid attention to when indicate low pressure.
For commercial I think there's no question of "yes" than can easily be
Where did you hear they need to be replaced every tire change? I've
vehicles well over 10 yo with them and have never replaced a single one
and they still check out w/ a gauge.
The firmware has to be reset for a reference point after one has been
off the rim but that's just mashing a couple of buttons on the control
panel--just how depends on the vehicle, of course.
Well, DOH!, no, but it's far less of an occurrence other than perhaps
after a flat repair or the like. Plus, in general most current
passenger tires are rated for 40 or so psi as max and they'll actually
run cooler (albeit harsher ride) at the higher pressures so it's pretty
unlikely to ever have one high enough to actually be a real concern...
Possible, sure, but not very likely particularly in comparison to
under-inflated which is both more likely from starting at low
recommended pressures with any leakage and that low pressure equates to
more sidewall flexure which is more heat which is the real culprit in
causing failures at speed. There's secondary contributor to
excessive/uneven treadwear of course.
On a half-dozen or so GM and Chrysler vehicles I have/had that's never
happened -- the firmware seems to have sufficient leeway on high side to
account for warmup. I tend to run to the higher range of rated
pressures; 35-36 usually instead of the low 30's typical of the vehicle
column stickers. Whether that has any bearing or not I've no data to
refer to. I have had a time or two when did have a low warning the
second morning out -- why that's a pretty common possibility for us will
be seen from the next paragraph. :)
Since we're on several miles of gravel roads and there's always new junk
turned over every time they're graded, punctures are a way of life,
particularly on the passenger cars. Hence it's pretty common to get a
'low' indication the next time go get in the car from having acquired a
new slow leak...that is actually a useful feature particularly for the
wife to go by the tire shop when she gets to town if it's at, say, 20 or
so so it'll make the 5-mi or so trip...or even if lower to add some air
before she heads that way. So, overall, imo they're _a_good_thing_ (tm).
On 10/24/2013 7:57 PM, firstname.lastname@example.org wrote:
Crew chiefs (some better than others) know how much pressure will build
up during a run so they adjust accordingly. Some tires do gain too much
pressure which makes the front end bounce. It has been described as
driving with 2 basketballs on the front.
Check out what a team (RCR) did back in '06
Snipped and hit send by mistake above......this is what I have to
do....and it's a PITA.
There are two different ways to relearn your Tire Pressure Monitoring
System (TPMS). One is with a TPMS scan tool (this is the preferred
method) and the other is the manual method (pain in the "you-know what",
but requires no special tools or equipment).
To use the manual method, set the parking brake. Enter into TPMS RELEARN
using the Driver Information Center (DIC) controls. (SEE Owner's Manual)
When you have successfully entered TPMS RELEARN, the horn will chirp and
the left front turn signal will illuminate. Increase or decrease the
tire inflation pressure on the left front tire for 8 to 10 seconds. The
horn will "chirp", indicating that the left front tire pressure sensor
has been relearned and the turn signal at the right front will
illuminate. Repeat the process for the right front tire. The horn will
chirp and the right rear turn signal will illuminate indicating that the
right front tire has been relearned and now you must now repeat the
process at the right rear tire. Then you will have to repeat this a
fourth time at the left rear. When the left rear tire has been
relearned, the horn will sound a "double chirp" indicating that the
relearn process has successfully completed.
Are you serious about this ?
What kind of vehicle ?
My Toyota only requires a simple press of a button.
I have seen where you may have to do something like that to reset or use
another of the door unlocks.
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