Quiz: What is the purpose of the engine control unit (ECU) in mode September 14, 2025 by Alex Turner What is the purpose of the engine control unit (ECU) in modern vehicles? Discover more about Vehicle Engine and Automobile at our home page. A) To manage engine performance and emissions by controlling various engine parameters B) To monitor the fuel level and alert the driver when refueling is needed C) To regulate the air conditioning system based on interior temperature D) To enhance the vehicle’s audio system and multimedia features Submit Answer