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P0446 EVAP Vent Control Circuit Malfunction

What it means

There's a problem with the EVAP vent valve or its circuit, which opens and closes to let the system breathe.

Severity: Low

Can I drive it? Safe to drive. You may have trouble filling the tank if the vent is stuck closed.

Common causes (most likely first)

Faulty vent valve/solenoid
Clogged vent filter or canister (dirt, spiders)
Wiring or connector problem

Likely fixes

Inspect vent valve and wiring
Clear debris from vent filter
Replace vent valve

DIY parts cost

$30–$150

Approximate estimate

Shop repair cost

$150–$450

Approximate estimate, parts + labor

DIY difficulty

Moderate

Varies by vehicle

Cost ranges are rough, approximate U.S. estimates and vary widely by vehicle, region, and parts brand. Always confirm the diagnosis before buying parts.

Parts you may need

EVAP vent valveCheck price
Charcoal canisterCheck price

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