Question about Lexus LS 400
If all four tires are at the proper pressure then check the spare. It has a sensor too.
Posted on Feb 28, 2014
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Posted on Jan 02, 2017
If you have the silver-metal valve cores, on the rims, there is NO reset proceedure. Under the valve cores is a transmitter, which is battery powered. It sends a "yes/no" signal to the tire pressure ECM. Note that ALL 5 tires transmit to the ECM. The signal is "at or above" the specific target pressure needed, or is is below the target pressure. What to do: get a GOOD tire pressure gauge, not those cheap ones that look like pencils. Set the tire pressures to the specification, INCLUDING the spare. Your light should go out. If not, there is the possibility that one of the sensors is innoperative, and that will involve a trip to the dealership, to get it replaced under warranty. Try the tire pressure resetting, adn don't forget the spare. Get back to me if this works. Glad to help, and thanks for choosing FixYA.
Posted on Nov 11, 2008
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.
Posted on Dec 06, 2008
Contrary to popular belief the indicator light does not reset itself. Once you put in the proper tire pressure in all tires including the spare you must reset the indicator light. The reset button is located on the driver side underneath the dash panel. Stick your on the break pedal, turn and look up. You will see the reset button. With th engine on and park break on,push and hold te button for 5 seconds. The indicator light will turn off and you are all set.
Posted on Apr 01, 2009
With the ignition on, but before you start the car, press and hold the the "Set" button located in front of the gearshift.
You should hear a tone after holding it for a few seconds. Once you hear the town you can release the button and the light should be reset.
Posted on Oct 26, 2009
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