Subaru 42084FA120 Vent Valve

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First of all, to replace the purge control solenoid valve, found under the intake manifold or on a bracket, you can disconnect the negative battery terminal and remove hoses and electrical connectors before reinstallation. The EVAP canister is replaced by disconnecting and reconnecting hoses and connectors. Also, the drain filter and valve, part of the canister in newer models, follow a similar replacement process. Replacing the fuel tank pressure sensor and the vent valve involves removing the fuel tank. The pressure control solenoid valve, situated above the rear axle differential or below the EVAP canister, requires disconnection of its connector and hoses. Installation is the reverse of removal.

First of all, to replace the purge control solenoid valve, found under the intake manifold or on a bracket, you can disconnect the negative battery terminal and remove hoses and electrical connectors before reinstallation. The EVAP canister is replaced by disconnecting and reconnecting hoses and connectors. Also, the drain filter and valve, part of the canister in newer models, follow a similar replacement process. Replacing the fuel tank pressure sensor and the vent valve involves removing the fuel tank. The pressure control solenoid valve, situated above the rear axle differential or below the EVAP canister, requires disconnection of its connector and hoses. Installation is the reverse of removal.

When the engine is on, the Evaporative Emissions Control (EVAP) system's job includes taking in fuel vapors and then letting them go into the intake manifold. Some of its components are fuel tank filler neck cap, fuel cut valve, EVAP canister, drain filter, drain valve, fuel tank pressure sensor, pressure control solenoid valve, shut-off valve, vent valve and purge control solenoid valve. This system works by controlling the fuel tank pressure and retaining vapors in the charcoal canister until they are absorbed by the engine during purging. The EVAP system contains a number of valves that prevent fuel from getting into it when refueling is done. A relief valve within the cap of the filler neck equalizes pressure inside the tank during loading operations. Replacing component parts involves disconnecting battery negative terminal; unplugging electrical connectors; indicating and disconnecting EVAP hoses; removing mounting bolts or nuts before reinstalling items backward. That specific guidance is provided for each model or year.

The EVAP system operates by monitoring pressure in the fuel tank and storing vapors in the canister until they are purged into the intake manifold.