(AP) - The Volkswagen Group has submitted a proposal for bringing Porsches, Audis and Volkswagen cars with 3.0-liter diesel engines up to California's air quality standards after regulators found the vehicles turn on emissions controls on government treadmill tests but turn them off on real roads.
The California Air Resources Board said it received VW's plan on Tuesday to bring the engines into compliance. The agency is not immediately releasing details of the plan.
The automaker has also admitted installing so-called "defeat devices" on 2.0-liter diesel engines in some of its most popular models, including Jettas, Beetles, Golfs and Passats.
The problem affects 85,000 cars with 3.0-liter diesel engines sold nationwide between 2009 and 2015, including some Porsche SUVs and Audis.
Between 16,000 and 17,000 of those vehicles are operating in California.
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