Chrysler Group LLC has recalled more than 248,000 crossover wagon and minivans because of a defect that could allow the key to slip while driving, causing the engine to shut down without warning. The affected models are the Dodge Journey crossover and the Grand Caravan and Chrysler Town & Country minivans. The vehicles are for the model year 2010 and were made from August 3, 2009 to June 17, 2010. About 3% of the 248,437 recalled vehicles are likely to be affected, Chrysler said in a notice posted on the National Highway Traffic Safety Administration website.