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Home › Chevrolet › 2006 › Epica LTZ › Repair and Diagnosis › Engine Performance › System › Engine Control System - 2.5L (LBK) - DTC P0230 To DTC P0501 › DTC P0496 › Circuit/System Testing

Circuit/System Testing

  1. Disconnect the EVAP purge solenoid valve electrical harness connector.
  2. Start the engine.
  3. Command the EVAP vent closed.
  4. Increase the engine speed to 1,200-1,500 RPM.
  5. Observe the fuel tank pressure sensor in H2O with a scan tool.
  6. Verify the scan tool FTP sensor H2O parameter is -1 to +1 in H2O.
    • If the FTP sensor in H2O parameter is greater then -1 to +1 in H2O replace the EVAP purge solenoid valve.
  7. With the engine OFF and the ignition ON, disconnect the EVAP purge solenoid valve pipe.
  8. Observe the FTP sensor in H2O parameter with a scan tool.
  9. Verify the scan tool FTP sensor in H2O parameter is -1 to +1 in H2O.
    • If the FTP sensor in H2O parameter is greater then -1 in H2O, replace the FTP sensor.
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