I have a 98 camery and po446 came up at the smog check how can i fix

Your problem is in the Evap. Emission System. I have seen hundreds of P0446 codes on Camry like yours. 90% of the time it is caused by a bad tank by-pass valve (VSV) on the charcoal canister. You can check the valve by removing it and applying power to one pin and ground to the other. The valve should click... you'll hear it and feel it. Sometimes the valve sticks intermittently, and you may not experience it when testing it.
The P0446 can also be caused by a bad Canister Control Valve located
on the air filter housing. You can test it the same way. This valve
turns on and kind of clicks rapidly when power and ground are applied.

There can also be a leak in the evaporative system. This is very
difficult to find, and you'd need special equipment to test for a
leak. Your best bet is a mechanic.They see the P0446 everyday, and
they'll be able to diagnose the problem relatively easily. Usually
they charge 1 hour labor to diagnose it. From there you can repair it
yourself if you want.I hope this helps and good luck.
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