An investigation by company engineers following a review of warranty data found that some 500es "were inadvertently equipped with software that may misread torque levels generated by their motors, causing them to shift into neutral — a prescribed failsafe mode," Fiat-Chrysler said in a statement.
The problem may occur only while the cruise control is engaged and the driver attempts to override the feature with accelerator-pedal applications or rapid tapping of the accelerate/decelerate buttons.
Restarting the car restores normal function.
There are no injuries, accidents or customer complaints linked to the recall.
Fiat dealers will install new software to correct the problem. A date has not been specified for the recall, but Fiat-Chrysler said service instructions are being sent to dealers now. Owners can contact Fiat-Chrysler customer service at 1-800-853-1403.
No information about the recall has been posted on the Web site of the National Highway Traffic Safety Administration, which oversees vehicle safety in the U.S.
Edmunds says: If you own one of these cars, it's best to contact your dealer for the latest information and to schedule a service appointment.