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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Engine Controls - 1.6L (L91) (Introduction)) >> Description and Operation >> Evaporative Emission (EVAP) Control System Description >> Canister Vent Restriction Test

Canister Vent Restriction Test

WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

After the small leak test has passed, a vacuum is retained in the evaporative emission (EVAP) system. The control module tests for a restricted vent path by commanding the purge valve OFF closed and the vent valve OFF open. The fuel tank pressure (FTP) sensor is monitored for a decrease in EVAP system vacuum. If the vacuum does not decrease to near 0 inch H2O in a calibrated time, DTC P2422 will set.

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