Toyota Motor Corp. says it now knows why some of their vehicles are accelerating out of control.

The auto giant announced by email that it will update employees later Friday on how to fix the problem.

"Plans are being developed on a variety of fronts. Tomorrow, we will update you with further details," Toyota officials said in the Thursday e-mail.

Until then, Toyota is telling dealers to stop selling nine of its models including America's best-selling car, the Camry.

Some of the gas pedals in the cars have been sticking causing them to accelerate on their own. The problem has been linked to several fatal accidents. Toyota says its engineers are working around the clock to fix this problem.

Meanwhile, Transportation Secretary Ray LaHood reports millions of Toyota owners say they are confused over which vehicles have been affected and are getting little information.

"Well, we called the man we bought the car from immediately, and he couldn't really give us much information because they really don't know," Toyota Corolla owner Diane Bernhardt said.

An investigation by ABC News found that Toyota has known about the problem for more than two years, but only suspended sales after being told to do so by the federal government.

Starting next week the company is expected to begin informing customers how they will repair the problem. Toyota says repairs should be complete in less than a month.