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Home >> Buick >> 2007 >> Lucerne CXS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.6L - DTC P0351 To DTC P2440 >> DTC P0496 >> Circuit/System Testing
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Testing

  1. Start the engine.
  2. Seal the EVAP system using the Purge/Seal function with a scan tool.
  3. Disconnect the EVAP purge pipe from the EVAP canister purge solenoid valve.
    • If the Fuel Tank Pressure Sensor is between -1 to +1 inch H2O, replace the EVAP canister purge solenoid valve.
  4. If the Fuel Tank Pressure Sensor parameter is NOT between -1 to +1 inch H2O, replace the FTP sensor.
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