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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0442: Evaporative Emission System Small Leak Detected >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM TESTS. After performing powertrain diagnostic system check, go to next step.
  2. If DTCs P0443, P0449, P0452 or P0453 are also set, diagnose those DTCs first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If DTCs P0443, P0449, P0452 or P0453 are not set, go to next step.
  3. Inspect EVAP system for the following conditions:
    • Loose, missing or damaged service port Schrader valve.
    • Loose, incorrect, defective or missing fuel filler cap.
    • Improperly routed, kinked or damaged EVAP system chassis purge line from vacuum source in engine compartment.
    • Damaged EVAP purge solenoid valve.
    • Improperly routed, kinked or damaged EVAP system chassis purge line from EVAP purge solenoid valve to EVAP canister.
    • Leaking fuel tank vent valve.

    Repair EVAP system as necessary. After repairs, go to step  6. If EVAP system is okay, go to next step.

  4. Using scan tool, perform EVAP system SERVICE BAY TEST. See SERVICE BAY TEST  under INSPECTION/MAINTENANCE PROCEDURES. If vehicle passes test, see DIAGNOSTIC AIDS . If vehicle fails test, go to next step.
  5. Remove fuel tank cap. Install Fuel Fill Cap Adapter (J 41415-40) to fuel filler neck. Connect EVAP Pressure/Purge Diagnostic Station (J 41413) to fuel fill cap adapter. Turn ignition on. Using scan tool, seal the EVAP system. Pressurize system to 15 in. H2O using EVAP pressure/purge diagnostic station. Check for leaks using Ultrasonic Leak Detector (J 41416) at the following areas: EVAP purge, vapor and vent hose/pipes, fuel fill hose/pipe, EVAP canister, EVAP canister vent and purge solenoids, fuel sender seals, fuel tank pressure valve and fuel fill limiter vent valve. Repair as necessary. After repairs, go to next step. If system is okay, go to DIAGNOSTIC AIDS .
  6. Using scan tool, perform EVAP system SERVICE BAY TEST. See SERVICE BAY TEST  under INSPECTION/MAINTENANCE PROCEDURES. If vehicle passes test, go to next step. If vehicle fails test, go to step  2.
  7. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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