How to Remove the Map Sensor From a PT Cruiserby Dan Ferrell
The manifold absolute pressure (MAP) sensor in your PT cruiser informs the computer of the difference in atmospheric pressure in relation to intake vacuum as the engine is running. Among other decisions, it helps the computer determine how much fuel the engine needs at any given moment. Thus, a MAP sensor with a faulty internal resistance may affect fuel feed to the engine and even ignition timing. In this case, you may replace the sensor, following these steps.
Remove the MAP Sensor
Open the hood and detach the ground cable form the car battery. Use a backup wrench to hold the bolt on the cable terminal as you unscrew the nut with a wrench.
Remove the air cleaner assembly from the top of the engine using a wrench or ratchet and socket if necessary.
Locate the manifold absolute pressure (MAP) sensor. The sensor is a small and black plastic box towards the back of the engine compartment. It is mounted on the intake manifold, right in front of the power steering fluid and it has an electrical connector in one end.
Disconnect the electrical connector from the MAP sensor.
Unscrew the two sensor mounting bolts using a ratchet and socket.
Lift the MAP sensor off the engine compartment.
Install the New MAP Sensor
Set the new MAP sensor in place and start the two mounting screws by hand. This will help avoid damage to the threads.
Tighten and torque the two mounting screws to 20-inch lbs. (2 Nm) using the torque wrench. See the Tip section for more information.
Connect the sensor electrical connector.
Install the air intake assembly using the ratchet and socket.
Attach the ground cable to the battery post using a wrench.
- If you do not have access to a torque wrench, you can rent one at most auto parts stores. If you need more help locating or identifying specific components in your PT Cruiser, consult your vehicle service manual. You can buy one at most auto parts stores or consult one at most public libraries free of charge.
Things You'll Need
- Wrench set
- Ratchet and socket set
- Torque wrench
- The exhaust system and related components in your PT Cruiser reach very high temperatures in a matter of minutes. Take this into account when working on components located inside the engine compartment to avoid severe skin burns or other injuries.
Since 2003 Dan Ferrell has contributed general and consumer-oriented news to television and the Web. His work has appeared in Texas, New Mexico and Miami and on various websites. Ferrell is a certified automation and control technician from the Advanced Technology Center in El Paso, Texas.