Possible Causes

GOOD TRIP EQUAL TO ZERO

INTERMITTENT CONDITION

CHECKING EVAP PURGE SOLENOID FUNCTIONALITY

EVAP PURGE SOLENOID VACUUM SUPPLY

DIAGNOSTIC PROCEDURE - P0441-EVAP PURGE SYSTEM PERFORMANCE

TEST	ACTION
1	NOTE: If any of the following DTCs are set (P0443, P0452, P0453, P0498 or P0499) diagnose them first before continuing with P0441. Ignition on, engine not running.With the DRBIII®, read DTCs and record the related Freeze Frame data.Is the Good Trip Counter displayed and equal to zero? Yes --> Go To 2 No --> Refer to the INTERMITTENT CONDITION symptom in the Driveability category. Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .
2	NOTE: 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®, actuate the EVAP Purge Solenoid.Does the vacuum drop when the solenoid is actuated? Yes --> Go To 3 No --> Replace the Evap Purge Solenoid. Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .
3	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? Yes --> Repair the vacuum supply hose/tube as necessary. Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC . No --> Refer to the INTERMITTENT CONDITION symptom in the Driveability category. Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .