- Insufficient air pressure in one or more tires: This is the most common cause of the light coming on. To check the tire pressure, use a tire pressure gauge to measure the pressure in each tire. The recommended tire pressure for the Lexus GS 350 is 35 psi (pounds per square inch) for the front tires and 33 psi for the rear tires.
- A slow leak in one or more tires: If the tire pressure is low and you can't find any obvious punctures or damage to the tires, you may have a slow leak. To check for a slow leak, spray the tires with a soapy water solution and look for any bubbles.
- A faulty tire pressure sensor: If the tire pressure sensors are not working properly, the low tire pressure light may come on even if the tire pressure is correct. To check the tire pressure sensors, you will need to take your car to a mechanic or tire shop.
- Low battery voltage: On some models of Lexus GS 350 the TPMS system may trigger a low tire pressure warning if the battery voltage is too low.
If the low tire pressure light is on, it's important to take your car to a qualified mechanic or tire shop to have the tire pressure checked and the problem diagnosed. Driving with low tire pressure can be dangerous, as it can affect the handling and stability of your car.
