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Home >> Chevrolet >> 2010 >> Traverse LS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - DTC P0192 To DTC P0629/P062B >> DTC P0446 >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON and fuel cap removed, verify that the FTP sensor parameter is between 1.3-1.7 V.
    • If not within the specified range, go to the FTP sensor section in Circuit/System Testing below.
  2. Install the fuel cap.
  3. With the engine running, the EVAP canister vent solenoid valve open and the EVAP canister purge solenoid valve commanded to 100 %, the fuel tank vacuum should not increase to more than -15 mm Hg (-8 in. H2O).
    • If the fuel tank vacuum is greater than the specified range, go to the restriction section in Circuit/System Testing.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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