Geithner said a common approach in a world of global markets is crucial.

European countries have been trying to stem the tide of a near financial meltdown that started in Greece, but is now threatening to engulf other heavily indebted countries. European nations have put together rescue packages for Greece and the broader eurozone. As a major contributor to such loan guarantees, Germany wants stricter measures in place to keep countries from running up such high debts and to regulate the banking and financial sectors.

Geithner said the European aid package has the right elements, but now needs to be put into action.

After talks in London, Geithner is to meet with German and other European officials in the coming days.