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Home >> Chevrolet >> 2002 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1441: EVAP System Flow During Non-Purge >> Diagnostic Procedures

Diagnostic Procedures

  1. Did you perform the Diagnostic System Check-Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. Are DTCs P0443, P0449, P0452, or P0453 also set? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
  3. Remove the fuel fill cap. Turn ON the ignition, with the engine OFF. With a scan tool, monitor the Fuel Tank Pressure (FTP). Does the scan tool indicate fuel tank pressure within -0.5-0.5 in. H2O? If yes, go to next step. If no, see DTC P0453: FUEL TANK PRESSURE SENSOR - HIGH VOLTAGE .
  4. Disconnect the purge pipe from the Evaporative (EVAP) emission canister purge valve. Install a hand held vacuum gauge to the EVAP canister purge valve purge port. Disconnect the EVAP canister purge valve harness connector. Monitor vacuum on the vacuum gauge. Start the engine and allow the engine to idle. Increase the idle to 1200-1500 RPM. Does the vacuum gauge indicate an increase in vacuum? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
  5. Replace the EVAP canister purge valve. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. After repairs, go to next step.
  6. Monitor the fuel tank pressure with a scan tool. Start and idle the engine for 3 seconds. Does the scan tool indicate that the fuel tank pressure is -0.5-0.5 in. H2O? If yes, go to next step. If no, go to step  3.
  7. Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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