This just in from the FIM:

Please find attached the Notification of Sanction for MotoGP rider Pol Espargaró.
The infringement is using more than 9 engines during the season, as they fitted engine number 10 to Pol’s bike for FP2 (MotoGP is limited to 7 engines per rider per season, but teams with Concessions are allowed 9 engines per rider per season).
The standard penalty is to start the race from pit lane with a 5-second delay from the time the pit lane exit would normally open.
He will do a sighting lap and go to the grid, but will then enter the pit lane on the warm up lap and starts the race from pit lane.