The 23-year-old, who had started third, shot off the line and ended up in second behind Marcus Armstrong, who took the lead after Logan Sargeant, polesitter in the sprint race, made a late escape and dropped to fifth on Saturday .
Jehan retained position through an early safety car and then a subsequent virtual safety car period before unleashing his pace.
Jehan, supported by Red Bull Racing, increased the pressure on Armstrong and pushed him for the lead as he came within a second of the Kiwi racer.
However, as overtaking proved difficult on the tight Imola track, Jehan crossed the finish line 1.4 seconds behind the Hitech rider.
Prema teammate Dennis Hauger was third, completing a double podium for the Italian team on home soil.
Jehan’s second place at Imola was his third podium finish in as many races that season and 10th overall in Formula Two. It also put him third in the drivers’ standings overall.
“At first I got off the line better than the guys in front but because I had to dodge Logan I lost some momentum and couldn’t catch Marcus. But after that, the race wasn’t easy.
“I tried to put pressure on him early in the race but it was really difficult to follow him, especially in the middle sector,” said Jehan after the race.
“I had DRS but I was never quite close enough to attack. I tried to calm down and try at the end but as I got closer I really struggled to follow him.”
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