Just days after Ford was hit with a $165 million civil fine—the second-largest in U.S. automotive history—federal regulators have launched two new investigations into the automaker's recalls that may not have worked or covered enough vehicles.

Just days after announcing a civil fine against Ford for moving too slowly on a recall, the U.S. government unveiled two investigations into recalls that may not have worked or covered enough vehicles.

Automaker has issued recalls related to fuel and oil leaks and randomly firing airbags, and is under investigation for faulty seatbelts and batteries