Multiple issues with 2009 Prius. First: Loss of air pressure in front left tire from time I picked up the vehicle to present. I continually need to put air in the tire, usually on a weekly/bi-weekly basis. The other tires are fine. Second: For the same tire, the tire pressure light would not be triggered until ~23 pounds, should have been triggered in same tire at 33 lbs. Third: Vehicle would not stop when applying pressure on brakes at slow speed. This has occurred about 6 times in a 6 month period. Simultaneously, the vsc light went on and the slid indicator went on. The terrain was on either asphalt or concrete roads, slightly downhill (concrete) and one street is a bit rough (filled in pot holes). Also, both areas are within a quarter mile of each other and near the ocean. With each occurrence the vsc went into effect. On 11/21/09 it jolted hard much more than the other occasions; this date was the incident on the bridge when the car was going in a slight downward direction. I lost control of the vehicle for several seconds and was afraid that I would hit the car in front of me; I beeped my horn to warn the driver in front of me. My vehicle did stop in time but it took alot longer than it should have taken. On a later occasion, I was going about 5-10 mph faster on a nearby street and attempted to stop for a stop sign and it did the same thing, however the vsc did not jolt back as hard. The vehicle was not angled down as much as the 11/21/09 incident. On 11/21/09 I took the vehicle to cabe Toyota dealership and they looked at the car but found nothing wrong with it. I also had the car looked at by Toyota Corp today and was told that the driver feels that I felt the ABS brakes only. This is not the case. When I stepped on the brakes each occasion it was as though there was nothing there and I had no control in stopping it. This was especially true when the vsc kicked in (the jerking). Each time it lasted many, several or more seconds.

- Huntington Beach, CA, USA