The 2022-2025 vehicle emissions requirements made under the Obama administration are expected to reopen for review by the U.S. Environmental Protection Agency, a person "who had seen the draft order" told Reuters.

Fuel efficiency standards were to be raised to a fleet average of 54.5 miles per gallon by 2025 under the agreement, which former President Barack Obama announced in 2011.

Trade groups representing automakers like General Motors, Toyota, Volkswagen, Ford, Honda and others have asked EPA Administrator Scott Pruitt to withdraw the decision made under former president Obama to lock in vehicle emissions rules through 2025. 

Automakers argue the rules drives costs (although environmentalists say it saves on fuel) and is not in line with consumer preferences.

According to Reuters:

"The EPA notice is expected to say that the agency plans to work in tandem with the U.S. Transportation Department to set consistent standards for corporate average fuel efficiency and emissions limits, the source said."

_{Original reporting by David Shepardson of Reuters.}