Germany 's Motor Transport Authority , the KBA , is to investigate whether VW 's Porsche uses sensors that could measure the angle of a car 's steering wheel to disguise exhaust emissions . The KBA is already conducting a similar investigation into Porsche 's Audi brand , which compares diesel engines to Porsche . However , Porsche denied that steering wheel movements were used to detect emissions tests and said it was fully cooperating with the KBA .
Germany's Motor Transport Authority, the KBA, is to investigate whether VW's Porsche used software that could measure the angle of a car's steering wheel to disguise exhaust emissions. The KBA is already conducting a similar probe into VW's Audi brand, which supplies diesel engines to Porsche. However, Porsche denied that steering wheel movements were used to detect emissions tests and said it was fully cooperating with the KBA.