The Manifold Absolute Pressure (MAP) sensor is a critical component in modern internal combustion engines. It plays a vital role in ensuring optimal engine performance by measuring the pressure inside the intake manifold and relaying this information to the engine control unit (ECU). This data is used to adjust fuel delivery, ignition timing, and other parameters to achieve efficient combustion and reduce emissions. Understanding the MAP sensor's function, operation, and importance is essential for vehicle owners, mechanics, and automotive enthusiasts alike. In this article, we will explore everything about manifold pressure sensors, including their working principles, types, symptoms of failure, testing methods, and maintenance tips.