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Home >> Chevrolet >> 2006 >> Impala LS, 3.5 N >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.5L - DTC P0010 To DTC P0420 >> DTC P0010 or P0011 >> Circuit/System Verification
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Circuit/System Verification

IMPORTANT: The supply of clean pressurized engine oil to the CMP actuator is essential to CMP actuator performance.
  1. Ensure vehicle has the proper oil viscosity.
  2. Observe the engine oil level. The engine oil level should be within operating range
  3. Allow engine to reach operating temperature
  4. Set the parking brake and place the vehicle in Park for automatic, or Neutral for manual.
    IMPORTANT: The engine will run rough and may require throttle input to keep running.
  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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