[VeniVidiVici]

That switch had two modes, which VW calls “road calibration” and “dyno calibration.” Only in “dyno” mode, which monitored for the precise conditions EPA and other agencies would use to test emissions, do the engine’s full emission controls go into effect.

The only thing full of shit is CARB and EPA.

Just what do you think VW is NOT doing with their emission controls? Do they just sit there and are bypassed? They use the exhaust to burn off particulates.

And just what can the software do to "monitor for emission testing"? They hang a sensor in the tailpipe to test for emissions. No software can detect that. Have all these people been failing their emission tests over the years?

[Krosan]

http://www.wired.com/2015/09/vw-fool-epa-couldnt-trick-chemistry/

“Michigan’s Stefanopolou says computer sensors monitored the steering column. Under normal driving conditions, the column oscillates as the driver negotiates turns. But during emissions testing, the wheels of the car move, but the steering wheel doesn’t. That seems to have have been the signal for the “defeat device” to turn the catalytic scrubber up to full power, allowing the car to pass the test.”