Engine control and sensors are essential components for maintaining optimal engine performance and fuel efficiency. They provide data on various engine conditions, such as temperature, air intake, and exhaust gas composition, to the engine control unit (ECU). The ECU uses this data to regulate fuel injection, ignition timing, and other parameters for smooth operation, reduced emissions, and improved engine life. Upgrading or replacing faulty engine control and sensors can optimize engine performance and ensure a cleaner running vehicle.