Jan. 10, 2021 7:00 am ET A chip shortage that has disrupted vehicle production in other parts of the globe is reaching U.S. shores, stifling output for major car companies and dimming prospects for a smooth recovery from the pandemic. Ford Motor Co. is planning to idle a Louisville, Ky., factory for a week starting Monday, because of parts shortages stemming from limited supplies of semiconductors now vital to everything from display screens to transmissions. The move will lead to the temporary layoffs of about 3,900 workers at the plant, which builds two popular SUVs, the Ford Escape and Lincoln Corsair. Honda Motor Co. , Fiat Chrysler Automobiles NV and others are also wrestling with the shortage, leading them to reduce output on everything from big pickup trucks to compact sedans.