Sebastian Vettel will retain his world title after the sports governing body cleared him of an illegal overtake, reports the Daily Mail.
The FIA have said Vettel has "no case to answer" over a move he made in Sunday's Brazilian Grand Prix.
Footage appeared to show Vettel overtaking Jean-Eric Vergne on lap four in a yellow-flag zone where the move is prohibited.
Vettel went on to come sixth, enough to clinch the title at the expense of Ferrari's Fernando Alonso who finished three points behind.
Ferrari wrote to the FIA seeking clarification of the matter.
Had the matter been pursued, Vettel could have been handed a 20 second penalty, relegating him to eighth place and handing the title to Alonso by one point.
Race Director, Charlie Whiting, told German publication Auto Motor und Sport: "If the lights are not installed at a flag post the driver responds to the first signal that is shown.
"In Vettel's case, between the last yellow light and the green light there was a green flag being waved. The distance is 350 metres here. Vettel responded to the flag and did everything right."