By Nam Hyun-woo Audi's electric vehicle (EV), the e-tron 55 Quattro, is facing a setback in sales here, as Korea's environment ministry is considering canceling the vehicle's certification over the questionable range it is claimed to be able to travel on a single charge, according to industry officials, Tuesday. According to the Ministry of Environment, it is investigating whether Audi Volkswagen Korea has violated the Clean Air Conservation Act by submitting inaccurate data on the vehicle's travel range. Depending on the result, the vehicle's certification could be canceled and the importer may face additional restrictions in its sales. Audi launched the e-tron 55 Quattro here in July, after winning certification from the ministry declaring it a low emission vehicle by stating the electric SUV can drive 307 kilometers at an ordinary temperature, 23 degrees Celsius, and 306 kilometers at a subzero temperature, minus 7 degrees Celsius, on a single charge.