Some 1.4 million Toyota Motor Corp vehicles are being scrutinized more closely by U.S. safety regulators looking for possible increased fire risk, the National Highway Traffic Safety Administration said on Monday. The expanded probe includes the manufacturer’s best-selling Camry sedan from model years 2007 to 2009. The probe was upgraded to an engineering analysis from a preliminary investigation, which may lead to an eventual recall. Often engineering analyses are closed without a recall.