Small wireless sensors are attached to the inside of all 5 wheels which send a signal when a tire goes below a pre set psi.
It could, some vehicles do have a tire pressure sensor in the spare.
The tire pressure indicator cap on a vehicle is designed to visually indicate if the tire pressure is at the correct level. It helps drivers easily monitor and maintain proper tire pressure, which is important for safety, fuel efficiency, and overall performance of the vehicle.
tire pressure should be on a sticker on the drivers door.
low tire pressure
44 psi
When "low tire pressure" shows up hold down on the RESET for several seconds
Listed in your owners manual and also found on the drivers door post.
The light usually comes of when the pressure is right and equal in all tires
well....because you lost air pressure
To reset the low tire pressure indicator on a 2005 Lexus LS 430, first ensure that all tires are properly inflated to the recommended pressure. Then, turn on the ignition without starting the engine. Press and hold the tire pressure warning reset button, usually located beneath the steering column, for a few seconds until the indicator light blinks and then goes off. Finally, start the engine, and the indicator should remain off if the tire pressures are correct.
low tire pressure.
there is a button near the hood release. Press it for a few seconds and it will reset the tire pressure indicator alarm.