Porsche said it’s close to fixing a fault that has caused two engine fires in 911 GT3 sports cars.

”We know the reason and the problem-solving measures,” CEO Matthias Mueller said today. ”We’re testing them.”

Porsche plans to announce the technical solution ”shortly” and will first inform customers, he said.

Porsche recalled all 785 of the GT3 version of the 911 from the current model year in February after the vehicles caught fire following engine failures. The carmaker took the rare step of requesting that owners stop driving the 137,300 euro car pending repairs. No accidents or injuries were tied to the incidents, it said at the time.