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Home › Chevrolet › 2006 › Impala LTZ › Repair and Diagnosis › Engine Performance › System › Engine Control System - 3.9L - DTC P0010 To DTC P0420 › DTC P0010 or P0011 › Circuit/System Verification

Circuit/System Verification

  1. Ensure the vehicle has the proper oil viscosity.
  2. Observe the engine oil level. The engine oil level should be within operating range.
  3. Allow the engine to reach operating temperature.
  4. Set the parking brake and place the vehicle in park for automatic, or neutral for manual.
  5. Command the CMP actuator to 25 percent. The Desired CMP parameter should match the CMP Angle parameter.
  6. Observe the CMP variance parameter. The CMP Variance indicates the difference in degrees between the CMP Angle and the Desired CMP. The CMP Variance will rise for 1-2 seconds until the CMP Angle parameter matches the Desired CMP parameter. The CMP Variance should again return to 0 degrees.
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