Regulators are looking into whether Ford should recall 112,000 Ford Expedition SUVs over seat belt issues and whether Ford's recall of 456,000 SUVs over a loss of power and an electrical system failure is adequate.

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. The largest of the probes covers about 457,000 Ford ...