volvo Workshop Repair Guides

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Fuel Tank Pressure Release Valve: Description and Operation

PURPOSE

The Fuel Tank Pressure Relief Valves are located in the fuel filler cap. Two safety valves prevent damage to the fuel system in the event of damage or
blockage to the fuel tank venting system or it's hoses.

OPERATION

One Fuel Tank Pressure Relief Valve opens in the event of fuel tank over-pressure, the other Pressure Relief Valve opens in the event of excessive
vacuum within the fuel tank or the tank venting system.

Powertrain Management > Fuel Delivery and Air Induction > Fuel Tank > Fuel Tank Pressure Release Valve > Component Information > Description and Operation

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