Fiat Chrysler is recalling some 1,930 vehicles fitted with a part from its Mopar performance arm because of a defect that may cause the cruise control to get stuck on or the vehicle to accelerate unpredictably.

Affected vehicles include model-year 2014 through 2016 Chrysler 300 and Dodge Charger and Challenger sedans and coupes powered by the 5.7-litre V8 and fitted with the Mopar Stage 1 Performance Package, as well as the vaunted limited-production 2018 Dodge Challenger SRT Demon.

The powertrain control modules (PCMs) in these vehicles may have a fault that, without warning, could stop the cruise control from disengaging. The NHTSA is recommending drivers of the affected vehicles avoid using cruise control until their car has been repaired.

Fiat Chrysler notes the glitch in the module may be immediately preceded by the dashboard warning lights all illuminating at once while driving; if this happens, the safest course of action would be to put the car in neutral, since the defect will render the brakes ineffective while in gear.

The automaker will begin notifying affected owners at the end of August, and the fix will simply require the replacement of the PCM or an update of the software.