Lexus tire pressure monitoring system

your tire inflation pressure is low......meder's tv service

The tire pressure is low then required. Make sure you have checked the tire pressure on all 5 tires. Yes i said 5, including the spare tire. If the spare tire pressure is low then also the light will also come on. ---------- Click this link below to get more details:--- http://technoanswers.blogspot.com/2011/10/tire-pressure-light-on-for-lexus-rx-350.html ----------- This should help.Thanks.Helpmech.

check your tire pressures and then press the tire pressure monitoring recalibrate button under your steering wheel on the lower instrument panel.

take one of the battery cables off for a couple of minutes and let the computer reset

there is not a reset for the tire pressure monitor system, the system resets its self when all tires are inflated to the proper psi. 35 psi . dont forget about the spare. if all tires are properly inflated check the "2nd set" switch. it is located under the dash on the passenger side. sometimes they get bumped accidently. unless you have a 2nd set of wheels with sensors the switch should be set to "main"

The tire pressure monitor detects any changes in the tire inflation pressure. Therefore, it must initialize and store it in its memory if the tires or wheels have been replaced, re-inflated or the tires have been rotated. You should be able to re-initialize the system by following these steps:

1. check and make sure that your tires are inflated to the correct pressure

2. turn the ignition switch to the ON position. If the low tire pressure warning light comes on, push and hold the tire pressure warning reset switch (think the switch is in the glovebox, but not sure) until the warning light turns off and then release the switch.

3. now press and hold the tire pressure warning reset switch until the low tire pressure warning light blinks three times.

4. initialization is *not* completed until driving at the vehicle speed of 19 mph or over for more than one hour. the tire pressure monitoring starts when initialization is completed.

the system will monitor all 5 tires. if one is 3-4 pounds differant or 1 of the tires are missing it will come on. doesn't matter what tires you have because the valve stem does the work.

there is a reset button for the tpms either just above the accerlator or to the right of the glove box. press it and tah dah....you should be good to go.

Veve713:
You probably didn't need new tires unless you had some miles on it. Remember that the spare tire also has a pressure monitor as well. It most likely is causing the low tire pressure light on the dash and only needs to be inflated back to what ever your other tires are set to. I had the same problem on my RX and took it back to the dealership where they told me since the spare is exposed to the same elements (it's under the back of the RX - you have to use the tire iron to let the spare down), it will inevidably lose air.

Good luck.

MDGolfHacker

Make sure you check the spare tire too; had this problem on another model and the dealer said it was the spare which is also monitored.  Good news in case you need it one day.