Ford Motor has stopped production and shipments of its electric pickup truck, the F-150 Lightning, while it looks into a potential problem with the vehicle’s battery pack.

“As part of our predelivery quality inspections, a vehicle displayed a potential battery issue and we are holding vehicles while we investigate,” the company said in a statement on February 14th. “We are not aware of any incidences of this issue in the field.”

The production and shipment halt also applies to an electric delivery van made by Ford, the E-Transit. According to the New York Times, the automaker has been hoping to ramp up production and establish a firm lead in electric pickups, which have the potential to become a large and lucrative segment of the E.V. market.

Faults in high-voltage automotive batteries can cause overheating and intense fires that can take hours to put out. For several months in 2021 and 2022, General Motors had to stop producing and shipping its Chevrolet Bolt electric compact after a manufacturing glitch was found to have caused a number of fires. Tesla cars have also been involved in a number of fires caused by damaged or faulty batteries.

The battery issue has cropped up as Ford is trying to cut costs and return to profitability after losing $2 billion in 2022.