LOS ANGELES (MarketWatch) -- The U.S. National Highway Traffic Safety Administration has sent investigators to look into the case of a Toyota Motor Corp. (JP:7203 3,070, -10.00, -0.32%) /quotes/comstock/13*!tm/quotes/nls/tm (TM 69.97, +0.19, +0.27%) Prius that sped out of control near San Diego, Calif., according to reports Tuesday. Toyota had previously issued a recall on 2004-09 Prius models for floor mats that could trap the vehicle's gas pedal, but reports said the San Diego incident may have stemmed from a different acceleration problem. Separately, The Wall Street Journal reported Tuesday that the total costs for Toyota's various recalls issued in the past few months could total more than $5 billion in 2010. Shares of Toyota closed down 1.4% in Tokyo trade Wednesday, following the reports.
