Welcome to Clublexus. Just a couple of tips for you and any other new members.
Search Google prior to posting any questions. If you have no luck.
Use the search function on Clublexus. It is outstanding.
Every question you could possibly think of asking. Ever. Has already been answered.
If your looking into how your car operates. The owners manual for your car is online at this Lexus web site.
It also has a great search functions.
If after all this you have no luck. And want to start a new topic. State which type of car and equipment you have installed. For example the year. Is it a 330 or 350. FWD or AWD. Is it a Lexus that was sold in the states or overseas. Mark Levinson or Premium Stereo. Navigation. Rear Entertainment. Does the system work and your only getting a warning. Things like that.
On your Tire Pressure Monitor System. 99 percent of the time it comes on it is the low pressure on the spare tire. So first things first.
Go to a gas station and pull up to the air compressor. Drop the spare tire so you can get to the air valve.
Using the tire gauge. Service all 5 tires to 30 PSI. Pull the spare tire back up inside.
Get in your car and turn your key to ACC. Thats where power is on. But the engine isn't started.
Press and hold for a few seconds the TPMS button underneath your drivers side dash. Its all the way under your steering wheel.
Start your car. And give it a minute. If the light goes out. You're good to go.
If it is still on. Or comes back on later. You may have a broken sensor and need to go to the dealer.
Good luck and welcome to Club Lexus.