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Home >> Pontiac >> 2002 >> Aztek AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Diagnostic Tests >> DTC P0403: EGR Valve Control Circuit >> Test Description
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Test Description

  1. 4

    When using the scan tool to increment the EGR valve, increment the valve to 10 percent then to 0 percent. Repeat this process to see if the test lamp turns ON then OFF. If the test lamp stays ON after commanded to 0 percent, the EGR solenoid high control circuit is shorted to voltage.

  2. 5

    This step tests for an open in the ground circuit to the solenoid.

  3. 6

    This step tests if voltage is constantly being applied to the solenoid.
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