The California Air Resources Board has reportedly discovered that even more VW-Group vehicles were cheating emissions tests. The WSJ and Reuters (via German paper Bild) are talking about how regulators have found software in Audi cars that effectively masked their CO2 output under examination. The revelations were apparently made up to four months ago, but neither Volkswagen, Audi or CARB have made the news public.

According to sources, the software was designed to identify test conditions -- slow, straight driving on a rolling road -- and reduce gearing ratios. CARB's tests, however, turn the wheel during examination, which disabled the software and revealed the sheer extent of Audi's misdeeds. It's believed that Audi didn't stop using the software until May 2016 -- several months after Volkswagen was ordered to begin recalling its cars.

Of course, Audi had been previously implicated in its parent company's emissions-cheating scandal, although only in select models. This new revelation, if true, will provide even more problems for a car maker that's already eyeballs-deep in trouble. Neither CARB or VW have responded to requests for comment from any news source, but we can expect this one to run and run and run and run...