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Old 10-05-2009, 10:56 PM   #1
moore.jeff54
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Default Tire pressure light is on...

So I checked all the tires and their pressure is right where it should be but my light is still on. Why won't it go off? It's starting to get very annoying.
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Old 10-05-2009, 11:35 PM   #2
mikeythejew
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I would see if there's a way to disable it. TPMS hasn't matured enough yet to make it worthwhile imo.
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Old 10-05-2009, 11:38 PM   #3
Andrew2.5
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i dont believe the dealer can disable it but they should be able to raise it a little if you prefer... I work at nissan so we deal with this daily. Also is it a solid light or flashing? if it flashes that means there is a stored code and it would require you to bring it to the dealer to be cleared.
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Old 10-05-2009, 11:39 PM   #4
Gigabelova
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I would just have it sent to the dealer to fix it. Just disabling it is a band aid fix.
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Old 10-06-2009, 01:03 AM   #5
moore.jeff54
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its just solid
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Old 10-06-2009, 01:32 AM   #6
Andrew2.5
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then maybe just try to go a little above the recommended spec. Also of course you do have to drive it down the road after to let the sensors read.
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Old 10-06-2009, 02:04 AM   #7
moore.jeff54
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its been on for a few days worth of driving
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Old 10-06-2009, 02:40 AM   #8
Gigabelova
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Come to think of it, either your pressure gauge is not reading right or the sensor is going bad.
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Old 10-06-2009, 07:33 AM   #9
blackfang
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Did you really need to make 3 threads on this?

No we can not disable it.

Yes we can adjust the PSI as can the OP. We set ours around 33-35 psi. Remember it is Fall. The cooler weather at night is here and this could drop your psi and turn the light on.
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Old 10-06-2009, 08:59 AM   #10
scubywagon
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take it to the dealer....should still be under warranty so it shouldn't cost anything.
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Old 10-06-2009, 11:04 AM   #11
blackfang
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Quote:
Originally Posted by scubywagon View Post
take it to the dealer....should still be under warranty so it shouldn't cost anything.
Not necessarily true. What if he has a nail or something in the tire?
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Old 10-06-2009, 01:28 PM   #12
moore.jeff54
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its a brand new car, so nothing should be wrong with the sensor.

and it made three because my internet was being sketchy and thought i clicked the button 3 times
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Old 10-06-2009, 02:36 PM   #13
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does the spare tire have a sensor? My dad's vehicle does and he couldn't figure it out for the longest time.

worth a try.
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Old 10-06-2009, 03:17 PM   #14
blackfang
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Quote:
Originally Posted by moore.jeff54 View Post
its a brand new car, so nothing should be wrong with the sensor.

and it made three because my internet was being sketchy and thought i clicked the button 3 times
Just because the car is "brand new" doesn't mean something will not fail. If that is the case, there would be no need for a warranty.

No the spare tire does not have a sensor.
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Old 10-06-2009, 03:28 PM   #15
2.5GTLegacy
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Right, something "brand new" can still have manufacture defects.

Or that you have a nail in your tire.

Set the correct tire pressure, look at the drivers door jam for PSI specs.
Reset the light manually. I know that most Toyotas have a reset button. Not sure about the Subarus. Or may be the kinda that resets itself, just drive the car a bit.

When in doubt, take it back to the dealership.
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Old 10-06-2009, 04:33 PM   #16
blackfang
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Subaru's you drive the vehicle about a mile, if that. I normally get them reset still in the parking lot. I remember working for a Toyota dealer and they have a reset button and some models the spare had a sensor too.
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Old 10-15-2009, 02:07 PM   #17
Kyguy
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My '08 WRX is having this issue too - I talked to the dealer and they told me to bring it in to get recalibrated.
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Old 12-04-2009, 05:26 PM   #18
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Its the colder weather, my 08 wrx and my sisters 08 wrx TPMS both came on the exact same day. If it doesnt bother you then just wait for it to warm up. That is unless you really are losing pressure... Ours was 100% the weather, we went from 43 to 19 today. It will have an effect.
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Old 12-04-2009, 11:09 PM   #19
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Colorado has been in the single digit temps off and on the last few days. We seen numerous tpms lights on due to this. Tire pressure will decrease approx 1 psi per 10 degrees of temp, so doing the math if you start out at 32psi on a 60 degree day minus 50 degrees (5 psi) you get the tpms light on. All you have to due is set your tire pressures to approx 35psi and check them if you get big temp changes. Also generally speaking, the tpms light on constant means low tire pressure whereas a flashing tpms light means a sensor/system failure. Hope this helps.

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Old 12-05-2009, 01:18 AM   #20
krothery
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Quote:
Originally Posted by SubeTek View Post
Colorado has been in the single digit temps off and on the last few days. We seen numerous tpms lights on due to this. Tire pressure will decrease approx 1 psi per 10 degrees of temp, so doing the math if you start out at 32psi on a 60 degree day minus 50 degrees (5 psi) you get the tpms light on. All you have to due is set your tire pressures to approx 35psi and check them if you get big temp changes. Also generally speaking, the tpms light on constant means low tire pressure whereas a flashing tpms light means a sensor/system failure. Hope this helps.

Bret
Subaru Senior Master Tech
GO Subaru West-Golden,CO
^ ^ this ^ ^

i had the same problem when i was in tahoe last week. in the manual it says to keep it at 35psi when under 35* or something like that.
anyways i did that and the light went away.
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Old 12-05-2009, 02:10 PM   #21
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Mine came on too... PSI dropped from 35 to 30. I pumped the tires back up and it wouldn't go away for a day... doesn't go away immediately.
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Old 12-05-2009, 08:26 PM   #22
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If there is a few pounds difference in the tire pressures, the light will come on. If the front tires have a difference of 3 or 4 lbs, the light will come on.

The light will also come on if the tires are over inflated. Make sure all the tire pressures are about the same, anywhere from 32 to 36 pounds.

You need to drive the vehicle over 20mph for a few minutes for the light to go out, if the tire pressures are okay.
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Old 12-11-2009, 03:27 PM   #23
RacerGrrl
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I have an '09 Impreza and my yellow tire pressure light came on yesterday - temp 3 degrees whereas it hasn't been below 20 in 8-9 months. Its solid yellow; not flashing. It was on once before months ago in summer weather and I added air and was golden.

So assumption was the temperature drop reduced the pressure. However, I took the car in, had the pressure checked, and it was low 2-3psi. (6 degrees is far to cold to check and fill in my own unheated 1 car garage). They filled back to 35psi and I headed home. I have driven it about 15 miles now in 15 degree weather and the light is still on. Should i be concerned? I am taking to my local mechanic (who I have taken all my cars to for years and trust thoroughly) for an oil change tonight. Should I let him look into it, or take it to the dealer since its still under warantee?
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Old 12-11-2009, 04:11 PM   #24
SubeTek
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If you've driven it for 15 miles it should have turned off if the tire pressures were set to proper levels. I'd return to the dealer to have them read the tpms code to determine the cause of the light. They should have checked the codes in the first place and then cleared them before you left.
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Old 12-13-2009, 07:28 AM   #25
blackfang
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There could also be a nail in the tire as well.
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