WASHINGTON — The Environmental Protection Agency said Friday that it will launch sweeping changes to the way it tests for diesel emissions after getting duped by clandestine software in Volkswagen cars for seven years.
In a letter to car manufacturers, the EPA said it will add on-road testing to its regimen, “using driving cycles and conditions that may reasonably be expected to be encountered in normal operation and use, for the purposes of investigating a potential defeat device” similar to the one used by Volkswagen.
VW’s sophisticated software allowed its cars to pass tests in the lab then spew pollution while on the highway. The changes announced Friday are designed to detect cheating.
“We’re actually making sure that this is a one-off,” said EPA administrator Gina McCarthy on Friday.
The agency is going to “look at all of the other models aggressively and do the testing we need to make sure there aren’t any hidden software devices or other ways they could defeat the emission system,” McCarthy said.
The revelations about VW led to unwanted scrutiny for the EPA.
