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Home >> Chevrolet >> 2007 >> Impala SS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - DTC P0443 To DTC P3449 >> DTC P0446 >> Repair Verification

Repair Verification

With the engine running, the EVAP canister vent solenoid valve open and the EVAP canister purge solenoid valve commanded to 100 percent, the fuel tank vacuum should not increase to more than 11 inches H2O.