I bought a 2006 LS 430 7/10. About 10/10 the tire pressure warning system displayed "Low Tire". When I checked, all tires were 10 to 20 pounds low. I filled them, and reset the warning system. Since then the tires lose between 5 to 10 pounds of pressure a month. I have had all tires checked for leaks. Tires do not leak. I took the car to Novato Toyota, where I purchased the car and C & A Extended Warranty. They checked the tires and found no leak. Somewhere between putting the full tires on the car and a month later, they loose 5 to 10 pounds. They tell me that the tire pressure warning system is not and cannot be causing the leak. Has anyone experienced this or does anyone have a suggestion how to resolve it.
