The agency says Ford did not fully comply with a 2020 recall of 620,000 vehicles for a rear backup camera fault.

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.

The U.S. auto-safety agency said Ford failed to recall more than 600,000 vehicles with defective parts in a timely manner.