Rick's Free Auto Repair Advice


P0442 Evaporative Emission Control System Leak (Small leak)

If you have a P0442 Evaporative Emission Control System Leak (Small leak), read this. The Evaporative Emissions system has applied a vacuum to the fuel system and detected a small leak. A P0442 small leak is usually caused by a crack in the vacuum hose somewhere in the system. It can also be caused by dirt or spider webs blocking the complete sealing of the purge or vent solenoids. GM has reported some issues with spiders building nests in the vent solenoid which prevents it from sealing properly. They’ve issued TSBs for vehicles most prone to the problem and released new vacuum lines that contain a spider blocking screen.

© 2012 Rick Muscoplat

Posted on by Rick Muscoplat


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