VW delivers Dieselgate fix plan to CARB

Volkswagen, filing at the eleventh hour, met the CARB deadline for a plan to fix the 3.0-liter engine portion of Dieselgate.

Responding at the eleventh hour, Audi filed a tentative repair plan for its 3.0-liter diesel engine with the California Air Resources Board (CARB). Taking the lead for Volkswagen, Audi sent regulators a proposed repair and recall plan to take care of the rigged emissions software that’s central to the Dieselgate scandal. Details of the proposal were not released. The deadline for the filing was yesterday.

Dieselgate, initially limited to 2.0-liter EA 189-based four-cylinder VW engines, was expanded to cover the six-cylinder 3.0-liter powerplant shortly after the automaker admitted that it had cheated to pass emission tests. The carmaker acknowledged installing a software “defeat switch” which turned “pass mode” on so that diesel engines could pass tough emissions U.S. emissions standards for oxides of nitrogen (NOx). At the finish of the testing the software restored the vehicle’s emissions system to “normal mode,” where performance and mileage increased. Emission levels also increased to as much as nine times over allowable limits.

Audi has taken the lead in filings and discussions with CARB and the Environmental Protection Agency (EPA) because it developed the 3.0-liter V-6 powerplant used in Audi, Volkswagen and Porsche vehicles. VW’s luxury division, Audi has indicated it will fix the emissions control software to address any violations.

CARB responded late yesterday in accepting the automaker’s filing that VW “agrees these devices resulted in excess emissions and other instances of noncompliance in the affected vehicles. CARB will respond following a thorough and complete review to make sure the plan addresses the presence of the illegal defeat device and follows the necessary environmental, vehicle and public health and safety regulations.”

Audi is fully cooperating with authorities to bring its 3.0-liter powerplant into compliance, the automaker said in a statement. It submitted the recall plan on time. “Now the authorities will review the plan and determine whether it meets their requirements. We hope to receive a decision shortly.” The Audi-developed engine has been used in Audi, Porsche and Volkswagen crossovers and Audi luxury cars.