General Motors (NYSE:GM) and the National Highway Traffic Safety Administration (NHTSA) announced Wednesday that the automaker’s self-driving unit, Cruise will recall 950 driverless cars from the roads across the United States and may withdraw more following an accident involving one of its robotaxis.

The NHTSA website issued a notice on Wednesday stating that the recall is prompted by a potential issue in the collision detection subsystem of the Cruise Automated Driving Systems (ADS) software. This problem may lead to improper responses following a crash.

a hit-and-run driver in San Francisco struck a pedestrian, sending them into an adjacent lane where they were hit a second time by a Cruise robotaxi that couldn’t come to a stop in time.

Cruise has implemented an over-the-air software update for its entire supervised test fleet of vehicles. Furthermore, all driverless vehicles affected by the issue will undergo repairs before returning to service.

Cruise announced the suspension of all nationwide operations last month following an order from the California Department of Motor Vehicles to remove its driverless cars from state roads.

The company is currently under scrutiny from multiple federal investigations concerning the safety of its vehicles. This includes two instances where driverless cars reportedly failed to yield to pedestrians in crosswalks.

Shares of GM are up 0.04% in pre-market trading on Wednesday.