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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 7 (ENGINE CONTROLS AND FUEL - 2.0L - DTC P0010 TO DTC P0238)DTC P0010 OR P0011CIRCUIT/SYSTEM VERIFICATION
2008 Chevrolet HHR LT, 2.4 P, Automatic

Circuit/System Verification

2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
IMPORTANT: The supply of clean pressurized engine oil to the CMP actuator is essential to CMP actuator performance.
  1. Observe the engine oil level. The engine oil level should be within operating range. Refer to Approximate Fluid Capacities .
  2. Ensure that the vehicle has the correct engine oil and is not old, burnt or contains additives. Refer to Checking Things Under the Hood in Service and Appearance Care within the Owner's Manual.
    • If the vehicle has the incorrect engine oil, is old, burnt, or contains additives, change the oil and filter.
  3. Test the engine oil pressure for correct operation. Refer to Oil Pressure Diagnosis and Testing .
  4. Allow the engine to reach operating temperature.
  5. Set the parking brake and place the vehicle in Park for automatic, or Neutral for manual.
  6. Observe the Int. CMP variance parameter. The Int. CMP variance will rise for 1-2 seconds until the Int. CMP Angle parameter matches the Desired Int. CMP parameter. The Int. CMP variance should again return to 0 degrees.
    7. IMPORTANT: The engine will run rough and may require throttle input to keep running.
  7. Command the CMP actuator to 24 degrees. The desired CMP parameter should match the CMP Angle parameter.
  8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.