The Federal Trade Commission has launched an investigation of dealers who may have collaborated by not utilizing consumer car shopping assistance website TrueCar, according to Automotive News.
The investigation will focus on 2011 and 2012 vehicle price competition issues.
Chevrolet Volt tops the compact category.
National Highway Traffic Safety Administration responds to consumer complaints.
NHTSA investigated defective engine cables on Taurus and Sable cars; NHSTA investigated loose fastener complaint on Hundai Sante Fe SUVs.