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Home >> Chevrolet >> 2012 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Control System & Fuel System - 2.8L, 3.0L - DTC P0300 To DTC P0455) >> DTC P0446 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.

This DTC tests the evaporative emission (EVAP) system for a restricted or blocked evaporative emission vent path that would cause excess amounts of vacuum to be developed in the evaporative emission system. With the purge valve open and the canister vent valve open, if the evaporative emission system vacuum goes above a calibrated threshold, the test will fail.

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