chevy cobalt mass air flow sensor problems

The control module converts the MAF signal frequency into a grams per second value. The MAF sensor converts the grid current flow into a frequency signal. As inlet air flows across and cools the grid, the MAF sensor increases current flow to the grid in order to maintain the constant grid temperature. The MAF sensor heats a wire element, or grid, within the MAF sensor in order to maintain a calculated temperature. An ignition positive voltage circuit and a ground circuit are supplied to the MAF sensor by independent circuits. The control module supplies the MAF sensor a signal circuit. The mass air flow (MAF) sensor is an air flow meter. A wide open throttle acceleration from a stop should cause the mass air flow displayed on a scan tool to increase from about 4-7 gm/s at idle to 100 gm/s or more at the time of the 1-2 shift. A plugged intake air duct or dirty air filter element.A change in the display indicates the location of the fault. If the harness appears to be OK, observe the scan tool while moving the connectors and the wiring harnesses related to the MAF sensor. Inspect the MAF sensor harness in order to ensure that it is not routed too close to high voltage wires such as spark plug leads. A poor connection or high resistance in the TP sensor ground circuit. The TP sensor signal circuit shorted to voltage The throttle plate is sticking or excessive deposits on the throttle plate or the throttle bore

If the throttle angle reading is not 0%, check for the following conditions: Observe the throttle angle with the throttle closed. A problem with the TP sensor or TP sensor circuit can cause the VCM to incorrectly calculate the predicted mass air flow value.

Chevy cobalt mass air flow sensor problems