Before the EVAP system on an OBD-II vehicle can be pressure tested or smoke tested for leaks, a scan tool must be used to _____.

Name: Before the EVAP system on an OBD-II vehicle can be pressure tested or smoke tested for leaks, a scan tool must be used to _____.
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Question

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Before performing a pressure test or smoke test on the EVAP system of an OBD-II vehicle, a scan tool must be used to close the canister vent solenoid. This action seals the system, allowing for accurate testing for leaks.

Before the EVAP System on an OBD-II Vehicle Can Be