Federal regulators are investigating whether the automatic braking systems in some 2014 Jeep Grand Cherokees may be defective after receiving a number of complaints from motorists about a potentially dangerous glitch that caused their vehicles to come to abrupt stops, The Wall Street Journal reported.

The U.S. National Highway Traffic Safety Administration has received nine complaints to date that allege the driver’s Jeep sensed a “pending threat” where there was none, and braked unexpectedly as a result; however, the brakes are designed to only automatically activate when the driver is slow to respond to an impending hazard. No motorists have yet to report that the alleged defect has led to an accident.

The investigation, which entails looking into roughly 20,000 vehicles equipped with the automatic braking system, was initiated June 1. Although it could eventually lead to a recall, no action is imminent according to reports.

Fiat Chrysler Automobiles — the manufacturer of the Jeeps — has gone on record stating that the model in question meets or exceeds all applicable federal safety standards.

While the ramifications of the investigation remain to be seen, the federal probe comes at a time when Fiat is already facing scrutiny for alleged lax oversight of other vehicle recalls it’s overseeing.

The government has scheduled a July 2 hearing to discuss Fiat’s handling of 20 other unrelated recalls currently underway involving more than 10 million vehicles. Fiat has acknowledged it missed deadlines in sending out letters to vehicle owners in five recalls, but stated that it has taken internal action to rectify its protocols.

Fiat asked that the upcoming government hearing be waived, but regulators said that the hearing will go on as scheduled.