In 1993, the EPA rejected the automobile industry assertions that sulphur adversely affects the OBD systems. The AMA was in protracted litigation with the environment department of the State of New York, which it lost, also claiming that high sulphur fuel harms their OBD systems.
En 1993, l'EPA a rejeté les affirmations de l'industrie automobile selon lesquelles le souffre endommage les systèmes de diagnostic intégré.