U.S. safety regulators are investigating some Honda Odyssey minivans because they can brake without the driver pressing the pedal. The probe affects nearly 344,000 vans from the 2007 and 2008 model years. The National Highway Traffic Safety Administration says it has received 22 complaints from owners about unexpected braking. In some cases, the vans braked while drivers were accelerating, cutting the speed by up to 30 miles per hour. Five people told the agency that dealers found trouble in a steering angle sensor in the electronic stability control system. The agency says it has no reports of crashes or injuries. Investigators will determine if the problem happens frequently enough to seek a recall.