The euro was last up 0.2 percent at $1.3374 with a session peak of $1.3379. The dollar traded up 0.4 percent at 94.45 yen, closer to a session low of 94.08 yen than the session peak of 95.21 yen.
The Fed will release its policy statement at the conclusion of its two-day meeting at 2 p.m. EDT (1800 GMT) on Wednesday.