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Evap issues suck. I haven't dealt with (evap) issues with this specific model but I have on many previous cars of my own and also from working at a shop. This troubleshoot will be for any car in general.
Anyways, assuming your wiring is done right the first thing I would check is the gas cap if it's sealing adequately. Look around for vacuum leaks, see if there is a purge valve that is stuck open or clogged. In most cars the pellets in the charcoal canister break apart and clog the evap system and would cause a check engine light. That usually happens when you over fill your gas tank and excess fuel would leak into the canister and break apart the charcoal. I would also check the fuel tank breather valve and see if there is a solenoid that is stuck open from pellets or maybe just need replacing.
Sometimes taking a day off from working on the car helps, you might remember something you forgot or missed.
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