"The DFB is charged with the setting-off of fireworks and the improper conduct of supporters (display of inappropriate banners and symbols, and inappropriate chanting)," European football's governing body said in a statement on Tuesday.
The Football Against Racism in Europe (FARE) group said a neo-nazi banner was displayed by German fans.
FARE, an independent anti-discrimination network working closely with UEFA to identify instances of racism at matches in the tournament, tweeted on Tuesday: "FARE can confirm that one of our observers reported a neo-nazi banner in the German section at match versus Denmark game in Lviv on Sunday".
The DFB has already been fined 10,000 euros at this tournament by UEFA after Germany fans threw what appeared to be rolled up pieces of paper at Portugal players during their match in Lviv on June 9.
UEFA will deal with the latest case on Saturday.
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