Systems and methods for electrically heated exhaust catalyst diagnostics

摘要: The invention provides systems and methods for electrically heated exhaust catalyst diagnostics. Methods are provided diagnosing an electric heater configured to increase a temperatureof positioned in system of engine. In one example, method comprises the by activating heater, routing air flow from intake engine, indicating is degraded based on test temperature being below threshold temperature. this way, may be diagnosed without inclusion costly sensors catalyst, where such diagnosis conducted periodically reduce release undesired emissions atmosphere.