Charles Leclerc was at risk of a post-race penalty at Sunday's Abu Dhabi Grand Prix after a fuel irregularity was discovered in his Ferrari during pre-race checks.
In a statement, FIA technical delegate Jo Bauer said: "The fuel declaration of car number 16 was checked before the car left the pit-lane.
"There was a significant difference between the declaration of the team and the amount of fuel inside the car.
"As this is not in compliance with Technical Directive (TD)/12-19 I am referring this matter to the stewards for their consideration."