2010 tire pressure sensor light - Subaru Forester Owners Forum
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post #1 of 12 (permalink) Old 12-05-2009, 09:57 AM Thread Starter
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2010 tire pressure sensor light

Has anyone else had an issue with the tire pressure light coming on in cold temps and remain on after warming/driving?

Does it have to be reset via dealership?

Thanks

2005 Aspen White XT
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post #2 of 12 (permalink) Old 12-05-2009, 10:07 AM
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confused, your tag says you have 05??? the lights dont need to be reset in the sense that you think, you just need to check the tire pressure with a gauge, chances are that your tires are in fact low, you also could have a very slow leak, my moms OB wagon has had one in the past and it was the seal on the tire pressure sensor itself
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post #3 of 12 (permalink) Old 12-05-2009, 10:20 AM
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^^ true.

TPMS Sensor Replacement.

His - 08 X Prem 5mt
Hers - 08 X 4EAT
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post #4 of 12 (permalink) Old 12-06-2009, 08:23 AM Thread Starter
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Originally Posted by FPT_RAIDER View Post
confused, your tag says you have 05??? the lights dont need to be reset in the sense that you think, you just need to check the tire pressure with a gauge, chances are that your tires are in fact low, you also could have a very slow leak, my moms OB wagon has had one in the past and it was the seal on the tire pressure sensor itself
I have a 2005, my fiancee drives the 2010 in question. Tire pressure was incresed after checking with gauge. The light went off, now it has come back on with the same tire pressure in all four tires as it had when the light went off....

Ambient temp this morning was 12 where live FYI.

2005 Aspen White XT
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post #5 of 12 (permalink) Old 01-04-2010, 08:14 AM
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Question 2009 Subaru Forester tire pressure sensor light

I started getting the tire pressure light when the temperature fell below 14 degrees. I was driving @ about 80 MPH and the light started blinking. I stopped at the nearest gas stations and checked the tire pressure which was as recommended in all the tires. Is this turely a temperature issue? or is there more to this. Does anyone know how to reset this sensor?

Thank you.
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post #6 of 12 (permalink) Old 01-04-2010, 08:56 AM
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I've had several different brand SUV's with TPMS systems... they've all had issues in really cold temps... A VW Toureg I had did it every time the temps got into the single digits even tho pressure was good in each tire - the only thing I did like about that system was the actual pressure readings it gave you for each tire on the dash. I'm not using them in the Subaru - winter package instead.

______________________________________
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post #7 of 12 (permalink) Old 01-04-2010, 08:58 AM
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Quote:
Is this turely a temperature issue? or is there more to this.
The same indicator is used for a low tire pressure indicator and a TPMS system malfunction indicator (telltale). Per page 3-14 and -15 in the '09 U.S. spec Forester owner manual:

Quote:
Your vehicle has also been equipped with
a TPMS malfunction indicator to indicate
when the system is not operating properly.
The TPMS malfunction indicator is combined
with the low tire pressure telltale.

When the system detects a malfunction,
the telltale will flash for approximately one
minute and then remain continuously
illuminated. This sequence will continue
upon subsequent vehicle start-ups as long
as the malfunction exists. When the
malfunction indicator is illuminated, the
system may not be able to detect or signal
low tire pressure as intended. TPMS
malfunctions may occur for a variety of
reasons, including the installation of replacement
or alternate tires or wheels on
the vehicle that prevent the TPMS from
functioning properly. Always check the
TPMS malfunction telltale after replacing
one or more tires or wheels on your
vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS
to continue to function properly.

Should the warning light illuminate steadily
after blinking for approximately one
minute, have the system inspected by
your nearest SUBARU dealer as soon as
possible.
HTH,
Jim / crewzer

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09 Forester 2.5X EJ25 5MT Premium AWP PZEV (sold 7/2011)
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post #8 of 12 (permalink) Old 01-04-2010, 10:57 AM
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Tire Pressure Sensor Light.

I had the same prooblem with my 09 Legacy and the owners manual said that the spare tire is also being monitored. You may want to check.
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post #9 of 12 (permalink) Old 01-04-2010, 11:13 AM
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Exclamation

^ Interesting! The OEM temp "donut" spare in my '09 Forester was not monitored by the TPMS. From page 9-2 of the owner's manual:

Quote:
When a spare tire is mounted or a
wheel rim is replaced without the
original pressure sensor/transmitter
being transferred, the low tire pressure
warning light will illuminate
steadily after blinking for approximately
one minute. This indicates
the tire pressure monitoring system
(TPMS) is unable to monitor all four
road wheels.
Regards,
Jim / crewzer

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post #10 of 12 (permalink) Old 01-28-2011, 07:07 AM
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I am having the same problem. I leave my house and the light isn't on, half way to work it comes on, then as I drive home it goes off. I have had a garage check it twice and the tires are fine. The service center just tells me to kick the tires to see if they are soft and if it doesn't go off in a couple of days to bring it in.
I can't bring it in because it will go off eventually. The service center also uses the temp excuse, which is annoying because it is only January and it will be this cold for another three month. I actually joined the forum today to see if anyone had a solution for this.
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post #11 of 12 (permalink) Old 01-28-2011, 07:24 AM
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A couple of suggestions here:
My '09 will illuminate the TPS light when the temp drops quickly and if my tire pressures are close to the lower limit. Mine seems to trip about 26 PSI. The really confusing part for me was that I had a pressure gauge I thought was good, but when compared to a very accurate gauge, it was reading about 4 PSI higher than what the pressure really was. (i.e. indicated 30 PSI on my gauge and actual pressure was 26). If you check and your pressures seem fine, compare with a different gauge.
Purchase a quality gauge (digital and calibrated if you can) that comes with a protective case. Bouncing around in a tool box or even your glove box will cause them to read incorrectly.

2009 XT, Camillia Red Pearl
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post #12 of 12 (permalink) Old 01-28-2011, 01:37 PM
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Most Subaru dealership maintenance shops fill all four tires to 40psi when you go for an oil change. The Subaru TPS sensor is etremely sensitive to anything below the manufacturer cold-temp pressure suggestion in your book.

The reason some of you are getting the light on when it's first cold is because you're at or below the lower PSI limit. Once you start driving the tires heat up; thus, warming and expanding the air inside your tires. Higher air temp = higher air pressure, so then the TPS light turns off. I would just suggest filling the tires to 35 - 40PSI. All the dealership shops do this in Colorado. The tires wear perfectly like this too.

Last edited by Soobs; 01-28-2011 at 01:43 PM.
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