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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1998 (Engine Controls And Fuel - 3.6L (LCS) - DTC P0638 To DTC P2229) >> DTC P2227, P2228, or P2229 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, open the hood to disable the Auto-Stop function.
  2. Ignition ON, verify the scan tool hood position parameter displays Open.
    • If the hood position does not display Open, refer to DTC P254F .
  3. Inspect the atmospheric vent on the ECM case for one of the following conditions:
    • Moisture in the vent inlet
    • Debris in the vent inlet
    • If a condition exists, attempt to clean or dry the atmospheric inlet.
  4. Start the engine. Observe the DTC information with a scan tool. DTCs P2227, P2228, or P2229 should not set.
    • If DTC P2227, P2228, or P2229 sets, replace the ECM.
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