Tl* the contact owns a 2011 toyota prius. the contact stated that the vehicle did not have a traction control switch. due to the switch not being in the vehicle, the vehicle stalled while driving up an incline during inclement weather. the vehicle was taken to a dealer where it was diagnosed that the failure was inherent to the model. the manufacturer was notified of the failure. the failure mileage was approximately 77,000. updated 05/06/16*lj