NHTSA's Chrysler investigation concerns possible stalling problems, with the organization stating that it has received 15 complaints of the 200's 3.6-liter Pentastar V6 stalling. "All 15 incidents reported stalling without warning during low-speed decelerations such as braking for a stop sign or traffic light," NHTSA's official release states. This investigation does involve both the sedan and convertible models.
Moving to the Explorer, NHTSA is investigating reports of power steering failure with the electric power-assisted system. In some instances, owners have complained that the system completely stops working, while other drivers simply noted greater effort being needed to turn the wheel. NHTSA writes:
No accidents have been linked to either the Ford or Chrysler issues.
"Some of the complaints indicated observing a power steering warning message when the failure occurred. In some cases, the condition was corrected by turning the vehicle off and restarting. However, some reports indicate the condition returned after restart."
Keep in mind, these investigations are not recalls – merely a way for NHTSA to probe a certain model and determine if an official recall is actually necessary. Click here and here to read both of the NHTSA investigation reports.