Diagnosing: Manifold Absolute Pressure (MAP) Sensor

MAP Sensor Tech Tips

Text on Screen: Helpful tips to consider when replacing a MAP Sensor

VO: A MAP Sensor is a Manifold Absolute Pressure Sensor. It is going to measure the amount of absolute pressure inside the intake manifold or the amount of vacuum.

Now, I know most engines will have between 18 and 23 inches of vacuum. As the throttle opens up, the vacuum is going to drop.

Now, the PCM is going to use inputs from the sensor to determine how much fuel needs to be added. So, this will be installed into the intake manifold.

Text on Screen: Ensure the power and ground are present, as well as an operative signal line to the PCM.

VO: And, we’ve got three terminals here, with a power ground and a return signal to the PCM. Now, if you’re going to replace one of these, make sure that power ground, and you have a good return signal line to the PCM that working.

Text on Screen: Ensure there is proper manifold vacuum to the MAP Sensor.

VO: Also, make sure that there is no vacuum leaks. And that there is no restrictions in the passage way here. All good things to remember when replacing your MAP Sensor.

Text on Screen: Motorists: If this job is beyond your skill level, visit your automotive service professional. This video is for general information purposes only. The provider makes no representations or warranties as to the information contained in this video or its usage, completeness, quality or accuracy. Any use of such information is at the user’s sole risk, and in no event shall the provider be liable for any consequential, incidental, special, punitive or direct or indirect damages arising from such use.