The Dorman Manifold Absolute Pressure (MAP) Sensor keeps you Ready for the Road Ahead by successfully measuring the density of the intake manifold’s incoming air pressure and relaying the information to the Engine Control Unit (ECU). This data collection enables the ECU to determine when to ignite the spark plugs and how much fuel to inject. This MAP sensor is also crucial for controlling boost pressure in turbocharged engines. Dorman has a distinguished reputation in the heavy duty truck and trailer aftermarket, manufacturing a variety of parts for a complete repair. Through advanced engineering, Dorman successfully checks into today’s most common failures to figure out the why, ultimately delivering modern solutions that not only match OEM parts, but solve known issues. FleetPride is your First Click in Heavy Duty .