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Home >> Pontiac >> 2000 >> Firebird Formula, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 5.7L >> Diagnostic Tests >> DTC P1441: EVAP System Flow During Non-Purge >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . After performing OBD system check, go to next step.
  2. Disconnect EVAP purge line from EVAP purge solenoid valve. Connect vacuum gauge to solenoid purge port. Start and idle engine. Using scan tool, command EVAP purge solenoid valve off. If vacuum gauge indicates a vacuum, go to step  4. If vacuum gauge does not indicate vacuum, see DIAGNOSTIC AIDS .
  3. Check EVAP canister purge solenoid for carbon contamination. Replace as necessary. After replacing canister purge solenoid, go to next step.
  4. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step  2.
  5. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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