[mhm]

I own a 2000 corolla with just over 110,000 miles and my CEL light came on as well. Autozone checks the CEL for free, and the same codes came up for the EVAP canister. The problem with the canister is that it lies below the tank, so fluid sits in the canister and damages the inside.

A couple people asked whether it was necessary to get a new one. It is, for a couple reasons.

1. In most states, if your CEL is on, they automatically will not give you a clean smog inspection.
2. The EVAP canister dehumidifies the air in the mixture. So especially in humid climates, its important to keep the air dry.

So, get it fixed, but try to buy the part and do the work yourself.

Once you get it in though, there are a couple of things you can do to prolong its life.

First of all, always get the gascap on at least three clicks. This will prevent the CEL from reading false codes again and will prevent backflow.
Also, NEVER top off your tank. When you do this, the gas is much more likely to backflow past the sensor and into the canister, restarting corrosion and bringing back that CEL.

Hope this helps!