tire pressure warning light illuminated
I just bought a 2007 ES 350. After checking the tire pressure, I found all four were at 40psi. The door info sticker calls for 30psi. I usually run 32 psi in my tires. I decreased the tire pressures to 32psi, and now the tire pressure warning light is illuminated constantly.
reset the tire light refer to owners manual. when set it will monitor that specific value. The car still thinks its monitoring a pressure around 40
toyota vehicles are sensitive when it comes to tpms sensors in order for the light to stay off after resetting the system you must put air pressure at 30 psi and drive the vehicle up to 30mph
Sounds like the thresholds that the light will come on at is set too high. Did you check the spare? because they also have sensors in the full size spare. To set the proper threshold, it is not dependant on speed or anything else. it is a direct monitoring system. Set all 5 tires to 30 psi. By the drivers feet there will be a small tire indicator reset button. Turn the car to accessory without starting it, hold that button until the tire light on the dash blinks 3 times and stops. That will set the threshold 80% of 30psi so roughly at 24 psi the light will come on. then simply set the tire pressure to what you want.
I have a 2012 Lexus ES 350. My tire light was on when one or more of my tires were at 30 or a little below. Drive to local dealer and they set all 5 tires for me at 35. Tire light was off and I am good to go. In the future, I would set it at 32 to 35 to keep the tire light off!
There is a small little button under the dash just under the ignition button. Press it once and drive a few miles and that should reset your TPMS light. If that doesn't work, have your TPMS valve stems checked (I do mine at Costco for free and they have the best prices for replacement TPMS). The battery in the TPMS usually lasts a minimum of 4-5 years and yours may have died.
The TPMS monitors a full size spare as well. If you have a full size spare, check the pressure on that tire as well! It's in the owners manual page 347.
If it's below freezing air pressure naturally drops a bit, this is fine. It happened to every car on the planet.
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