FIFA Ultimate Team and EA Sports Football Club have been taken offline for maintenance until 5pm BST this evening.
The 11-hour downtime is the second major disruption to the service this month, following last Thursday's maintenance to prepare the mode for FIFA 14.
The reasons for today's downtime have not been announced.
This year's FIFA, FIFA. 14, goes on sale on current-gen platforms and PC on September 27, with a PS4 and Xbox One version following later in the year.