Two problems related to engine stall have been reported for the 2005 Toyota Matrix. The most recently reported issues are listed below.
Engine stalled on Toyota Matrix 2005. Took to dealership and charged me a bunch to fix . They replaced the computer, but talked me into doing a bunch of other stuff they said would fix it.
The contact owned a 2005 Toyota Matrix. The contact stated that while driving at speeds of 65 mph, the vehicle accelerated without warning. The vehicle decreased in speed as the contact removed his foot from the accelerator pedal. The dealer could not duplicate the failure. The contact confirmed that the vehicle had been taken to the dealer on nine separate occasions with concerns of unintended acceleration. The dealer could not determine the cause of failure. The vehicle was left in possession of the dealer. The contact would not drive the vehicle any longer due to concerns for his safety while operating the vehicle. The approximate failure mileage was 25,000 and the current mileage was 25,000. Updated 5/12/10 the consumer stated when the speed was set at 55 mph, the speed would fluctuate from 51 mph uphill to 59-60 mph downhill. When starting from a stop, the engine would either stall or spin the wheels. At times, the engine would not respond when trying to increase speed. During very cold winter days, the engine would stumble and at times buck like a bronco with the gas pedal to the floor until the engine was warmed up. Updated 06/18/10.