Tire Pressure Sensor - WTF - Toyota RAV4 Forums
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#1 (permalink) Old 02-03-2010, 08:16 PM
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Tire Pressure Sensor - WTF

Is driving me nuts. 2007 Limited. We never had a problem before. Two weeks ago the sensor goes on, I stop and check all 5 tires. All are at 32psi. I filled them to 34psi, no change. Drop the car off at the dealer and they say the sensors are fine. The dealer tells my wife " In the winter you need to add an extra 4-5 psi" I say Bull. My wife brings the car home with all 5 tires at 37psi. Everything was fine for about a week. Today once again the lights goes on. Buts is different, sometimes it stays lite, sometimes it flashes. Pressure is still at 37psi

34,000 tires are factory orgignal. Any ideas???
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#2 (permalink) Old 02-03-2010, 08:19 PM
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bad sensor???

To The BlackMobile!!!
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#3 (permalink) Old 02-03-2010, 08:40 PM
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This might help

The information in this bulletin should help you.
http://rav4world.com/forums/viewtopic.php?t=9480
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#4 (permalink) Old 02-03-2010, 09:26 PM
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#5 (permalink) Old 02-04-2010, 09:59 AM
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Your dealer is full of it. I have ten tires (two full sets) and run them all at 32 PSI with no problems. Even when it's zero degrees F. I never get a warning. 37 lbs is too high, especially in winter when you want as much rubber on the snow as possible. It sounds to me as though the computer sensor in the car is faulty; insist that they check it out thoroughly. Call Toyota Customer Service if they won't cooperate.

2009 RAV4 Base 4WD, Barcelona Red Metallic, extra value package, P225/65R17 tires (M+S and winter), XM radio, body side moldings, mud flaps, chrome exhaust tip
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#6 (permalink) Old 02-04-2010, 11:26 AM
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I called the dealer around 9am today and gave them hell for suggesting to my wife to raise the tire pressure. I dropped them down to 32ps last night. I then call customer service. I spent 55 minutes on hold before I hung up..........most be all the recall calls. The car is going back in on Monday. They are going to check the computer sensor. I'll leave a follow up once the problem is corrected.
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#7 (permalink) Old 02-04-2010, 01:54 PM
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I have had mine go off twice. Once for the spare tire which was in the low 20s and the other was right about the time cold weather hit my area. Now in my case the cold weather coupled with the tires I was down in the mid 20s on one or two tires. I put them back to 32 degrees and it's been fine since.

So the dealer isn't wrong about cold weather reading lower but if the tire is already at 32psi then it's not the issue.

Basic rules of checking tire pressure (I'm sure you know but for anyone reading this thread who doesn't).
Try to do it when the vehicle has sat at least few hours after driving, overnight if possible.
Check tire pressure during normal weather for whichever season your in.

When cold months are coming I try to go 1-2 psi over recommended values. Warm weather I err on the side of right at or 1 psi lower.

Good luck hopefully it's an easy fix and doesn't cost a ton if your out of warranty.
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#8 (permalink) Old 02-04-2010, 02:05 PM
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Most likely a dead battery in one of the sensors.
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#9 (permalink) Old 02-04-2010, 02:11 PM
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Quote:
Originally Posted by zaitcev
Most likely a dead battery in one of the sensors.
I don't think that would fit the symptoms. If he goes to 37 PSI, the alert goes away.
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#10 (permalink) Old 02-05-2010, 10:07 PM
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Quote:
Originally Posted by Carbon
Quote:
Originally Posted by zaitcev
Most likely a dead battery in one of the sensors.
I don't think that would fit the symptoms. If he goes to 37 PSI, the alert goes away.
That's exactly right. And also he said the TPMS light flashes sometimes. That indicates a malfunction in the ECU. A dead battery in a sensor wouldn't do that.

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