Toyota's US unit has denied it plans to announce a new recall for the 2004-2009 Prius to deal with the potential risk for floor mat entrapment of accelerator pedals as media reports have said.

“There is no new recall being planned for the Prius to address this issue,” the automaker said, adding that the 2004-2009 Prius was part of the 2 November, 2009 announcement of a voluntary safety recall campaign to deal with floor mat gas pedal entrapment in some Toyota and Lexus vehicles.

“The remedy process for these vehicles began at the end of 2009 and is occurring on a rolling schedule during 2010. Owners of the involved vehicles that have not yet been remedied are asked to take out any removable driver's side floor mat and not replace it with any other floor mat,” Toyota said.

Toyota and US authorities said they have launched a probe into an incident on Monday in which a 2008 Prius hybrid suddenly accelerated on the I8 freeway east of San Diego, California.

That car was subject to the November safety recall to check floor mats. However, the owner has told US media he took the car in to his Toyota dealer to have it repaired and was told it was not on a recall list.

Kyodo News reported, however, that Toyota was still in the process of notifying users to bring their Prius hybrids in for repair. The automaker said it was carrying out the recalls in order and denied putting off the repair for the owner.

In the San Diego case, the driver called an emergency number on Monday after the accelerator pedal got stuck and he could not slow down the Prius while driving on the highway. A police highway patrol officer drove alongside and instructed the driver to use the emergency brake and he eventually succeeded in stopping the car. Local media reports said the officer checked the car and found the floor mats and pedals all in their correct positions but signs of brake wear with pad dust deposited on the wheels and beneath the car which was subsequently towed to the Toyota dealership.

The case has drawn intense media coverage in the United States with footage of the Prius and the police car shown repeatedly on television.

Separately, Toyota has said it will now expand the repair of Tundra pickup trucks it announced in November last year to all 50 US states under a voluntary ''service campaign.''

The automaker had previously said it would repair about 110,000 2000-2003 Tundras vehicles in 20 'cold climate' states due to the risk that the truck chassis/frame could become corroded by road salts, causing spare wheels to fall off.

Toyota spokeswoman Ririko Takeuchi in Tokyo told Kyodo the company would soon begin notifying users of the Tundra trucks subject to the voluntary repair in the remaining 30 states, but did not specify the total number of vehicles that would be covered in the latest safety campaign.

Though Toyota sales in the United States dropped 8.7% in February following the recall crisis, insiders are saying sales in March are up by as much as 50% after the automaker earlier this month offered new incentives, including zero percent financing for a limited period.

''It looks like the sales incentives have been successful,'' Takeuchi told Kyodo News.

Earlier this week, Toyota president Akio Toyoda said that ''[US] sales will definitely come back from around March'.

In a media interview, Don Esmond, senior vice president of automotive operations for Toyota Motor Sales USA., said the positive sales figures surpassed the company's expectations and cited consumer demand for cars which was restrained during the economic downturn.

Meanwhile, the US House of Representatives Committee on Energy and Commerce on Tuesday said it would hold a hearing on Thursday to examine the operations of the National Highway Traffic Safety Administration, which oversees recalls of vehicles.

The hearing is expected to focus on whether it has sufficient resources and capability to investigate possible safety defects.