"Wayne Moses" <wmoses@houston.rr.com> wrote in message
> When I drove off and noticed the constant 60 deg.F reading, it was sitting
> on a concrete parking lot in open sun -- a situation that tends to give an
> initial false high reading. Normally, after driving off the read temp
> would drop to the correct temperature. In this particular case, it was
> behaving counter to that.
I can't speak about Hyundai yet because it has been OK so far and I've not
had it during the summer. On my Buick, even on a very hot day, the
temperature would not always show if it is higher than the last reading when
the car was shut down for only a few hours. If I did not use the car all
day, it would usually be on the high side as you note, then comes down after
drive off.
If the actual temperature was lower, it would come down to the correct
reading very shortly after the car is moving. If the actual temperature is
higher, I'd have to drive for at least 3 miles before the reading would go
up. It is possible to take a couple of short trips, say 1 to 1.5 miles, and
have the reading the same as the earlier low reading. The reason for the
lag to increase is so that sitting in traffic the sensor is not quickly
fooled by engine heat.
The there was the day I was listening to the radio station. 101.0 FM at 1:01
on a hot summer afternoon when the temperature was 101 degrees. I thought
the computer just went crazy for that moment.
Wayne Moses - 16 Dec 2006 21:27 GMT
EP> I can't speak about Hyundai yet because it has been OK so far and I've
EP> not had it during the summer. On my Buick, even on a very hot day, the
EP> temperature would not always show if it is higher than the last
EP> reading when the car was shut down for only a few hours. If I did not
EP> use the car all day, it would usually be on the high side as you note,
EP> then comes down after drive off.
EP> If the actual temperature was lower, it would come down to the correct
EP> reading very shortly after the car is moving. If the actual
EP> temperature is higher, I'd have to drive for at least 3 miles before
EP> the reading would go up. It is possible to take a couple of short
EP> trips, say 1 to 1.5 miles, and have the reading the same as the
EP> earlier low reading. The reason for the lag to increase is so that
EP> sitting in traffic the sensor is not quickly fooled by engine heat.
I must say that I have not paid as close attention to this as you have with
the Buick. Thanks for sharing the experience though.
In my case despite the temperature difference between shut-down and start-
up it always took a minute or two to settle down and read right.
EP> The there was the day I was listening to the radio station. 101.0 FM
EP> at 1:01 on a hot summer afternoon when the temperature was 101
EP> degrees. I thought the computer just went crazy for that moment.
That is indeed weird. :-)
Best Regards
Wayne Moses <wmoses@houston.rr.com> Fri, 15 Dec 2006 22:12:11 -0600
Haven't had any complaints with Tiburon. I believe there are TSBs about
inaccuracy on Sonata, Azera, and Santa Fe, however.
What may have been happening with your car is that the control unit
thought the higher actual temperature was influenced by the radiator, so
it kept the cooler temperature instead of changing.
Wayne Moses - 16 Dec 2006 21:27 GMT
h> Haven't had any complaints with Tiburon. I believe there are TSBs about
h> inaccuracy on Sonata, Azera, and Santa Fe, however.
Their sensors are probably quite similar right?
h> What may have been happening with your car is that the control unit
h> thought the higher actual temperature was influenced by the radiator,
h> so it kept the cooler temperature instead of changing.
Could well be. I guess the logic was not designed for the strange Houston
weather we were having the last few days - quite cool in the morning but
getting pretty warm in the afternoon. I will have to keep a closer eye on
it.
Thanks again.
Best Regards
Wayne Moses <wmoses@houston.rr.com> Fri, 15 Dec 2006 22:38:20 -0600