EPA Diagnostic and Torque Broadcasting Requirements
§ 1045.110 How must my engines diagnose malfunctions? The following engine-diagnostic requirements apply for engines equipped with three-way catalysts and closed-loop control of air-fuel ratios: (a) Equip your engines with a diagnostic system . Equip each engine with a diagnostic system that will detect significant malfunctions in its emission control system using one of the following protocols:Continued