Map Sensor Problems
I have been having problems with my 2009 LT 2.4L A6 Malibu. I had been having intermittent problems with svc traction and esc codes on the DIC for a while. Then it started starting having stuttering and acceleration problems. This finally caused engine codes p0106 and p0107.
These lead me to believe it was the map sensor. I replaced it and still have the same warning codes and engine codes. Next I decided to test the wires to the map sensor itself. They all seem to test OK. I get a voltage drop when a vacuum is applied to the sensor(green), my 5 volt line (grey) is reading 5 volts and I am getting 12V from the PCM (orange/black). All of the engine codes point to the map sensor but all of my test show that it is working fine.
Where would you go from here? The dealership has been little help, it took three trips for them to guess that it might be the map sensor. Unfortunately it is out of full warranty, only have powertrain left.
Thanks for any help
Last edited by jack0395; 01-25-2014 at 12:04 PM.