A federal judge turned up the heat on Volkswagen AG, setting a March deadline for the German automaker to state whether it has found an emissions fix for 600,000 diesel vehicles that is acceptable to U.S. regulators.
U.S. District Judge Charles Breyer in San Francisco said he wants a definitive answer on the status of a fix by March 24.
The U.S. Justice Department last month sued Europe's biggest automaker for up to $46 billion for violating U.S. environmental laws. VW and its Audi and Porsche brands continue to be barred from selling any new 2016 diesel models in the United States. VW also faces more than 500 lawsuits from U.S. owners.