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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 10 (ENGINE CONTROLS AND FUEL - 2.2L (L61) - DTC P0442 TO DTC P2544)DTC P0455CIRCUIT/SYSTEM TESTING
2008 Chevrolet HHR LT, 2.4 P, Automatic

Circuit/System Testing

2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
  • Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
  • Refer to the J 41413-200  operation manual for detailed instructions in Evaporative Emission System Diagnosis .
  1. Connect the J 41413-200  to the vehicle service port. For vehicles without a service port, disconnect the purge tube at the quick connector on the EVAP canister side of the EVAP canister purge solenoid valve and install the CH-48096  . See Special Tools .
  2. Use a scan tool to seal the system and use the flow meter on the J 41413-200  , calibrated to 0.51 mm (0.020 in) to determine that there is no leak in the EVAP system.
    • If a leak is detected use the J 41413-200  to apply smoke to the EVAP system at the service port or the filler neck until the leak is located.
  3. Using the GE-41415-50  , connect the J 41413-200  to the fuel filler neck.
  4. Start the engine.
  5. Allow the engine to idle.
  6. Use the Purge/Seal function to seal the system with a scan tool.
  7. Command the EVAP canister purge solenoid valve to 20 percent.
  8. The vacuum/pressure gage on the J 41413-200  and the FTP parameter on the scan tool should both show vacuum.
    • If the vacuum/pressure gage shows vacuum but the FTP parameter does not show vacuum, replace the FTP sensor.
    • If neither the FTP parameter nor the vacuum/pressure gage shows vacuum, repair the restriction in the purge path.
  9. Verify that the vacuum increases to the abort limit on the scan tool or more than 3.2 volts, and the value is similar between the scan tool and the vacuum/pressure gage on the J 41413-200  .
    • If the values are not similar or the voltage did not reach 3.2 volts, replace the FTP sensor.
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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.