U.S. safety regulators have upgraded their probe into Tesla (TSLA.O)‚ opens new tab vehicles over power steering loss to an engineering analysis - a required step before the agency could demand a potential recall. The National Highway Traffic Safety Administration (NHTSA) on Friday said the investigation covers about 334‚000 Model 3 and Model Y vehicles from the 2023 model year. The agency's upgraded probe follows a December Reuters investigation that found tens of thousands of...