Instruction of Replacing a Neon MAP Sensor with OBD 2 scanner

Jan 14 16:11 2012 Woody Su Print This Article

Manifold absolute pressure (which short for MAP) sensor of car is located on the front portion of the Neon's air intake manifold and has two small screws securing it into place. MAP sensors are responsible for identifying the air pressure within the manifold and sending a reading to the engine's ECU (engine control unit) referring to the voltage level for the spark in the ignition cylinder. 

Manifold absolute pressure (which short for MAP) sensor of car is located on the front portion of the Neon's air intake manifold and has two small screws securing it into place. MAP sensors are responsible for identifying the air pressure within the manifold and sending a reading to the engine's ECU (engine control unit) referring to the voltage level for the spark in the ignition cylinder. If your MAP sensor is malfunction,Guest Posting you will notice a reduction of power, backfiring and hesitation when accelerating. It is very important to first test related engine components before replacing the MAP sensor.

You'll Need OBD 2 scanner, Gaffer's tape, Multimeter, Screwdriver and Socket wrench set for this job.

Insert an OBD 2 scanner into your Neon's OBD port; it is generally located to underneath your steering column near the driver's door. The OBD port will usually be within 2 to 3 feet of the steering column on any car manufactured after 1995. Power on the scanner and turn the Neon's ignition key to the accessories position. If your scanner cannot translate the troubleshoot code, then you will need to consult it on a website such as OBD Codes or by search engine.

Check your air intake assembly and vacuum lines leading from the intake to the manifold for leaks and unplugged joints. Power the engine on and feel around the vacuum hoses attached to the manifold for any spurting of pressurized air. Use gaffer's tape to plug up and secure any leaks or disjointed lines that are leaking. Also check the air filter for very dirtiness and replace it if necessary. If you do any repairs to the intake, you will need to erase the OBD code using your scanner and drive your Neon for at least 25 miles so as to make sure that your MAP sensor will not activate the check engine light again.

Check the MAP sensor's electrical connection by using a multimeter or voltmeter. Unplug the electrical connection leading to your MAP sensor. The electrical connection should read between 4.5 volts and 5.0 volts when the engine is turned on and the probes are touching the terminals on the electrical connection. If the terminals do not read the correct voltage, or if they are completely dead, then you may have an electrical problem but not a failed MAP sensor.

Replace the MAP sensor by unscrewing it from the air intake assembly. Unplug the electrical connection. Screw in the new MAP sensor with a screwdriver or socket wrench. Connect the electrical connection again. Using the OBD scanner to erase the MAP sensor troubleshoot code. I am glad to communicate with you, if you are interested in OBD 2 scanner.

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Woody Su
Woody Su

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