The Volkswagen logo is seen on a vehicle at the New York Auto Show in the Manhattan borough of New York City, New York, U.S., March 29, 2018. REUTERS/Shannon Stapleton

FRANKFURT (Reuters) - Resolving bottlenecks caused by tougher emissions rules could cost Volkswagen VOWG_p.DE more than 1 billion euros, Chief Financial Officer Frank Witter said on Wednesday.

The auto industry is struggling to adapt its vehicles to meet the new Worldwide Harmonized Light Duty Vehicles Test Procedure, known as WLTP, which takes effect from September.