2014 Kia Optima Ex
Hi everyone. I am getting a P0455 code only when the gas tank hits a 1/4 full or less. As long as i keep the gas filled above that level it never comes on. Have brought to dealership and they replaced charcoal canister and did a smoke test which showed flow front to back and back to front but light still comes on only when gas tank is a 1/4 full or less. Any thoughts??