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Car Forum / Subaru Cars / October 2007Low tire pressure sensor
Yesterday was the coldest day of the season so far, 27 degrees. When I went out in my '08 Outback, the tire pressure light was on. Temp outside was 30 at that time. I went back home and got the other car. Later in the day, I checked and pumped all the tires up to 34 psi. Sticker is 32 front, 30 rear. One of the tires was at 28, the other 3 at 30. Today I went out with the temp about 35. Low pressure light was on for about the first 5 minutes, then went out. So, what's happening here? Is the sensor sensitive enough to pick up 28 psi? Is this just an effect of the low temp? Should I just ignore it on cold mornings? TIA!  Signature------------------------------------------------------- "Every day is Saturday when you're retired." Bob Burns Mill Hall PA (email is a spamtrap) Most systems will trigger a warning at 2psi below spec. > Yesterday was the coldest day of the season so far, 27 degrees. When I > went out in my '08 Outback, the tire pressure light was on. Temp outside [quoted text clipped - 11 lines] > > TIA! I have a 2007 Legacy 2.5 GT, and, several times, without it being really cold (> 50 F) my light has gone on (why it can't tell WHICH tire, which might have cost $5 more, is crazy), and...all tires were at or above (and, sometimes, I even filled them above) the required pressure. Every time, even though I seemed to be at the right or higher pressure, the light didn't go out for over 20 minutes of driving. > Most systems will trigger a warning at 2psi below spec. > [quoted text clipped - 14 lines] >> >> TIA! Tire pressure systems seem like another thing to pull the fuse on nd forget about that government mandated garbage. Disble DRL's and airbags too. Darn guvmint dont need to take care of me! > I have a 2007 Legacy 2.5 GT, and, several times, without it being really > cold (> 50 F) my light has gone on (why it can't tell WHICH tire, which [quoted text clipped - 30 lines] > > - Show quoted text - > Tire pressure systems seem like another thing to pull the fuse on nd > forget about that government mandated garbage. Disble DRL's and > airbags too. Darn guvmint dont need to take care of me! I'm with you. My wife mentioned this about new Forester. I await her sensor to come one! Yes, I found that measured pressure a bit below about 30 pounds can trigger the alarm. Plus, most pressure gauges probably have about the same accuracy tolerance as the tire sensors; worst case, you may measure 32 pounds and the tire sensor says you have 28, when in fact you have 30. That said, I have never received a low pressure alarm when maintaining the 32/30 psi per the sticker. As noted in the manual, a few miles of travel may heat up the tires enough to clear the alarm. I agree that the system should tell you which tire is low, but it is better than nothing. Just notice all the folks with dangerously low tire pressure next time you are out in traffic. > Yesterday was the coldest day of the season so far, 27 degrees. When I > went out in my '08 Outback, the tire pressure light was on. Temp outside [quoted text clipped - 11 lines] > > TIA! |
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