p0446
Moderate
Toyota · SUVs
EVAP Vent Control Circuit
Quick Answer
Error code P0446 on your Toyota SUVs means: EVAP Vent Control Circuit. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
4Runner TRD Pro 2024Grand Highlander Limited 2024Highlander XLE 2024Highlander Hybrid Bronze Edition 2023Land Cruiser 1958 Edition 2024RAV4 XLE Premium 2024RAV4 Hybrid SE 2024Sequoia Capstone 20244Runner Limited 20244Runner SR5 20244Runner TRD Off-Road 2024Grand Highlander Platinum 2024Grand Highlander XLE 2024Highlander LE 2024Highlander Limited 2024Highlander Platinum 2024RAV4 Adventure 2024RAV4 LE 2024RAV4 TRD Off-Road 2024RAV4 XLE 2024Sequoia Limited 2024Sequoia Platinum 2024Sequoia SR5 2024Sequoia TRD Pro 2024Venza Limited 2024
Likely Causes
How to Fix It
1
Locate the canister close valve near the charcoal canister (typically under the rear of the vehicle)
2
Inspect the vent filter and vent hose opening for debris or blockage
3
Check the vent valve connector for corrosion and verify proper pin contact
4
Test the vent valve resistance with a multimeter and compare to specification
5
Command the vent valve with a scan tool and listen for audible click to confirm operation
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
Canister close valve (CCV)
Vent filter
Vent hose
Electrical connector repair kit
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