DTC P0441: EVAP Purge System Performance: Testing

If any of the following DTCs are set (P0443, P0452, P0453 or P0498) diagnose them first before continuing with P0441. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . Ignition on, engine not running. With the DRBIII® scan tool, read DTCs and record the related freeze frame data. Is the Good Trip Counter displayed and equal to zero? If yes, go to next step. If no, see INTERMITTENT CONDITION under SELF-DIAGNOSTIC SYSTEM.
After disconnecting the EVAP purge vacuum connections, inspect the lines and solenoid for any signs of contamination or foreign materials. Using a hand vacuum pump, apply 10 in. Hg to "CAN" side of the EVAP purge solenoid. Ignition on, engine not running. Observe the vacuum gauge. With the DRBIII® scan tool, actuate the EVAP purge solenoid. Does the vacuum drop when the solenoid is actuated? If yes, go to next step. If no, replace the EVAP purge solenoid.
Turn the ignition off. Carefully inspect the EVAP purge solenoid vacuum supply hose for proper routing. Check for a pinched or plugged hose from the throttle body to the purge solenoid. Inspect the vacuum port at the throttle body for any damage or plugging. Were any problems found? If yes, repair the vacuum supply hose/tube as necessary. If no, see INTERMITTENT CONDITION under SELF-DIAGNOSTIC SYSTEM.