Investor focus will be on a number of Fed officials due to speak this week for clues on what the U.S. central bank would do at its next policy meeting on Sept. 19-20.
Markets are pricing in a 93% chance of the Fed holding steady on rates this month, and over a 60% probability of no more hikes this year, CME FedWatch tool showed.
The yen strengthened 0.06% to 146.16 per dollar. The Asian currency has traded around the psychologically important 145 level since the middle of August, with traders keeping an eye out for any signs of intervention.
Japan intervened in currency markets last September when the dollar rose past 145 yen, prompting the Ministry of Finance to buy the yen and push the pair back to around 140 yen.
The euro was up 0.06% to $1.078, while sterling was at $1.2602, up 0.11% on the day.
The Australian dollar added 0.2% to $0.6463 ahead of the Reserve Bank of Australia policy meeting on Tuesday when it are expected to stand pat. A Reuters poll showed that all but two of 36 economists said the RBA would hold its official cash rate at 4.10% on Sept. 5.
In cryptocurrencies, bitcoin rose 0.95% to $25,997.50. Ethereum , gained 0.67% to $1,638.30.