In September 2015, the EPA issued a notice of violation to Volkswagen after independent researchers at West Virginia University discovered massive discrepancy spikes in on-road diesel exhaust. VW software engineers had programmed the engine control unit (ECU) with an algorithmic 'defeat device' that detected when the car was undergoing laboratory testing by measuring steering wheel position, speed, and atmospheric pressure. During testing, the vehicle activated full emissions controls; on normal roads, it switched to high-power mode, releasing up to 40 times the legal limit of nitrogen oxides. The fraud resulted in over $30 billion in global fines and multiple criminal indictments.
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Archive Record · 2000s–2010s
Dieselgate: How Volkswagen Engineers Programmed Software to Cheat Emissions Testing
Volkswagen Defeat Device Code / 2000s–2010s
In September 2015, the EPA issued a notice of violation to Volkswagen after independent researchers at West Virginia University discovered massive discrepancy spikes in on-road diesel exhaust. VW software engineers had programmed the engine control unit (ECU) with an algorithmic 'defeat device' that detected when the car was undergoing laboratory testing by measuring steering wheel position, speed, and atmospheric pressure. During testing, the vehicle activated full emissions controls; on normal roads, it switched to high-power mode, releasing up to 40 times the legal limit of nitrogen oxides. The fraud resulted in over $30 billion in global fines and multiple criminal indictments.
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