Speaking following a summit with leaders from the Asia-Pacific region in Hawaii, Mr Obama indicated that the time has now come for the Asian superpower to act fairly in terms of its valuation of the yuan.
The US - along with the majority of other major economies globally - believes China is purposefully preventing its currency from appreciating in value truthfully in order to give it an edge in the worldwide trading arena.
And the president - who came to office in 2008 - stated that while there has been a "slight improvement" in the recent past, China remains too reluctant to act as its economic power continues to grow rapidly.
"Changes are difficult for them politically, I get it ... but the US and other countries, I think understandably, feel that enough's enough," he noted.
By Claire Archer