How to Replace the Manifold Absolute Pressure (MAP) Sensor
Signs of a bad manifold absolute pressure sensor include excessive fuel consumption and lack of power from your vehicle. You can also fail the outlier test.
The intake manifold absolute pressure sensor, or MAP sensor for short, is used in fuel-injected vehicles to measure air pressure in the engine's intake manifold. The MAP sensor sends this information to the electronic control unit or ECU, which uses this information to adjust the amount of fuel added at any time to achieve the most optimal combustion. Symptoms of a bad or faulty MAP sensor include excessive fuel consumption and lack of power in your vehicle. You can also find out about a bad MAP sensor if your vehicle fails an emissions test.
Part 1 of 1: Disconnect and replace the failed MAP sensor
Necessary materials
- Gloves
- Pliers
- Replacing the absolute pressure sensor
- Socket wrench
Step 1: Locate the installed MAP sensor.. Getting to know the part you are looking for should help you find the faulty sensor on your vehicle.
If you don't know where it is or what it looks like, examine the replacement part to identify it in the engine bay.
To narrow down your search, keep in mind that there will be a rubber vacuum hose going to the MAP sensor, as well as an electrical connector with a group of wires coming from the connector.
Step 2: Use pliers to remove the retaining clips.. Any clamps holding the vacuum line must be disconnected and moved down the length of the hose to free the vacuum line from the nipple it is connected to on the MAP sensor.
Step 3: Remove all bolts securing the MAP sensor to the vehicle.. Using a socket wrench, remove all bolts securing the sensor to the vehicle.
Set them aside in a safe place.
Step 4: Disconnect the electrical connector connected to the sensor.. Disconnect the electrical connector by pressing the tab and pulling the connectors firmly apart.
At this point, the sensor should be free to remove. Remove it and connect the new sensor to the electrical connector.
Step 5: If the MAP sensor was bolted to the vehicle, replace these bolts.. Be sure to tighten the bolts, but do not overtighten them. Small bolts break easily when overtightened, especially on older vehicles. An easy way to get consistent results is to use a short-handled wrench.
Step 6. Replace vacuum line and removed clips.. Vacuum hose replacement is complete.
If this job does not suit you, call an experienced AvtoTachki field technician to replace the manifold absolute pressure sensor at your home or office.
