The EPA is investigating a second emissions-control software program on Volkswagen AG cars that were rigged to pass pollution tests, one that the automaker may have failed to properly disclose.

Volkswagen AG waited two months after acknowledging a software abnormality in its cars to tell regulators the algorithm was designed to cheat emissions tests, according to a staff memo prepared for lawmakers investigating the automaker.

Fiat Chrysler has issued its second recall in six weeks over flaws that left vehicles vulnerable to hacking, spotlighting concerns that increasingly sophisticated electronics in cars may allow criminals to interfere with their operation.

Fiat Chrysler Automobiles NV is buying back some defective vehicles, giving $1,000 credits and handing out $100 gift cards to get more owners to come in for repairs after U.S. regulators said the company delayed previous safety efforts.

A Wal-Mart Stores Inc. driver hit a limo van carrying comic Tracy Morgan last year because he was so fatigued he didnt notice traffic had slowed ahead of him, U.S. investigators found Tuesday.

Fiat Chrysler Automobiles NV waited 18 months to tell federal safety regulators about a security flaw in radios being installed more than a million vehicles that hackers later exploited to seize control of a Jeep last month.

Of the 23 Fiat Chrysler recalls that U.S. regulators investigated, three were so dangerous that the government invoked its most potent power: requiring the company to buy back the vehicles.

A record penalty that could reach $105 million isnt the only imposition U.S. auto-safety regulators are making on Fiat Chrysler: Its also getting a house guest.