That’s not how VW’s emissions cheat worked. It didn’t “detect” anything, it just performed in a certain way when driven within the very unnatural envelope of an emissions test. If you took a VW out on the road and drove it around the same way the test “drove,” you’d get an identical result. Not to excuse VW’s malfeasance, but I don’t understand why the implementers of an obviously flawed test didn’t catch their share of blowback.
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