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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Control System & Fuel System - 4.8L, 5.3L, And 6.0L - DTC P0452 To DTC P2135) >> DTC P0455 >> Circuit/System Description >> Notes

Circuit/System Description: Notes

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The control module tests for a large leak or restrictions to the purge path in the Evaporative Emission (EVAP) System. When the enabling criteria has been met the control module commands the EVAP vent solenoid valve ON and the EVAP purge solenoid valve ON, allowing vacuum into the EVAP system. The control module monitors the fuel tank pressure (FTP) sensor voltage to verify that the system is able to reach a predetermined level of vacuum within a set amount of time.

DTC P0455

Control Module Command EVAP Canister Purge Valve EVAP Canister Vent Valve
ON Open Closed
OFF Closed Open
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