The FA had spoken to Guardiola about the issue in mid-December and two formal warnings have been given which were ignored.
Guardiola said in November he wears the ribbon to support imprisoned politicians in Catalonia, where he was born.
"He has until 6pm on Monday, March 5 to respond to the charge".
City will be looking to bounce back from Monday's defeat at Wigan against an Arsenal side who also suffered an embarrassing defeat in the week losing to Osterunds of Sweden in the Europa League, albeit qualifying for the last sixteen on aggregate.
A huge row could now erupt between Guardiola and the FA, with City's manager making it clear when he started wearing the ribbon that he would not be deterred by a suspension."If they want to suspend me - Uefa, Premier League, Fifa". He said he would continue wearing the ribbon and was not concerned about the threat of punishment. Until they are out, always they will be with me.
GETTY Pep Guardiola’s Man City take on Arsenal at Wembley in this weekend’s Carabao Cup final
"Because, OK, they can suspend me for doing that, but the other people are in jail".
And he admitted he will be judged on silverware and not sexy football.
City have produced some of the best football in Premier League history this time round to earn plaudits from around the world.
Asked at a press conference if a jet carrying his family was searched after it landed at Barcelona-El Prat airport last week, Guardiola confirmed it was.
"If the rules allow us to do that, he is a free citizen", Mourinho said.
"It is a club that needs to grow up, grow up and win titles and hopefully this weekend we will have the first one". "My family saw it, they saw the police searching the plane, and that's it". It's in front of 80,000 people at Wembley Stadium in London.