p0446
Moderate
Toyota · Sedans
EVAP Vent Control Circuit
Quick Answer
Error code P0446 on your Toyota Sedans means: EVAP Vent Control Circuit. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Avalon XLE 2022Camry XSE 2024Camry Hybrid SE 2024Corolla SE 2024Corolla Hybrid LE 2024Crown Platinum 2024Mirai Limited 2024Prius XLE 2024Camry LE 2023Camry LE 2024Camry SE 2023Camry SE 2024Camry TRD 2024Camry XLE 2024Corolla LE 2023Corolla LE 2024Corolla XSE 2024Crown Limited 2024Crown XLE 2024Prius LE 2024Prius Limited 2024
Likely Causes
How to Fix It
1
Locate the canister close valve (usually near the charcoal canister under the vehicle)
2
Check the vent valve electrical connector for corrosion or damage
3
Test the vent valve with a multimeter for proper resistance
4
Inspect the vent hose and filter for obstructions or debris
5
Use a scan tool to command the vent valve and verify it actuates
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
EVAP vent control valve (CCV)
Vent hose
Vent filter
Electrical connector repair kit
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