Manifold Absolute Pressure Switch

Change this sensor out.

Manifold absolute pressure switch.

A failing map sensor can cause engine hesitation rough idle or black smoke from the tail pipe. Otuayauto 55573248 map manifold absolute pressure sensor air intake switch for chevy 09 11 aveo 07 19 impala 08 19 buick enclave 07 13 gmc sierra 1500 4 9 out of 5 stars 10 13 89 13. If the map were to go bad you will likely know it. Your manifold absolute pressure or map sensor measures the pressure in the intake manifold for the engine control unit to adjust fuel flow and engine timing.

How it works is 5 volts dc is supplied to the sensor from the pcm powertrain control module. The map sensor also known as the manifold absolute pressure sensor is a necessary component of your vehicle s fuel injection system. The map sensor responds to changes in the intake manifold pressure vacuum and provides a reading of engine load. As you may know the intake manifold is responsible for distributing the air and fuel mixture from the internal combustion chamber into each cylinder.

This constant adjustment helps to keep your engine running smoothly. The map sensor measures the absolute pressure inside the intake manifold of the engine. Bwd map sensors convert engine vacuum manifold pressure to an electrical signal for fuel delivery and timing control. A vehicle s manifold pressure sensor or manifold absolute pressure sensor map is part of an engine s electronic control system.

The manifold absolute pressure map sensor is used by the powertrain control module pcm for engine load input. The manifold absolute pressure sensor or map sensor is a sensor that is attached to the intake manifold on a car s engine. The pcm uses this input as well as others to calculate the correct amount of fuel to inject into the cylinders.