Question about Pontiac Grand Prix
If you didn't already know P0107 is the map sensor. Before you go and replace it. pull the electrical plug and reinsert it. Also check the vacuum line going to it and make sure it is in good shape and connected. This sensor will cause your problem. When you pull the plug check it for corrosion clean if necessary. Also check all the vacuum lines, because this will also cause the code to come up. I seriously doubt that the map sensor is bad. Most like it is a vacuum leak some where. Let me know. Randy
Posted on May 19, 2011
Hi, check the connector and wiring on your MAP sensor. If that looks good, back-probe the sensor connector with the engine running, using a voltmeter. First verify there is approximately 5 volts DC between the gray and orange wires. If not, remove the connector and probe the connector terminals. If there is still less than 4.8 volts at the connector, suspect the wiring from the PCM is bad. If the voltage is good off the sensor but not on the sensor, the sensor is bad.
If the voltage is good, next check the function of the sensor. Measure the voltage between the orange and green wires. Open and colse the throttle to see if the voltage changes with throttle opening. If it does, the sensor is probably fine. Please let me know if you have questions, and thanks for using FixYa.
MAP sensor is #1 in the diagram below.
Posted on May 19, 2011
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Posted on Jan 02, 2017
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