Hyundai Accent charcoal canister issue causing gas pump nozzle to cut off on Hyundai Accent

Some Hyundai Accent owners report experiencing issues with the gas pump nozzle cutting off while refueling, which may be related to a faulty charcoal canister or a clogged fuel vapor vent line. Symptoms of this problem can include difficulties in pumping gas, the pump kicking back as if the tank is full, and the illumination of a Check Engine Light with a Diagnostic Module/Tank Leak code such as P1401. Over time, this issue can worsen, preventing the gas pump from dispensing fuel properly, potentially indicating a clog in the charcoal canister's big line. Additionally, if the charcoal canister or fuel vapor vent line is obstructed, it may cause the fuel hose nozzle to shut off prematurely or lead to fuel spilling outside the tank. To resolve these issues, owners may need to ensure that the vapor path from the fill vent valve on the gas tank to the air filter on the charcoal canister is clear, and cleaning the charcoal canister filter and valve, as well as inspecting for loose charcoal in the hose, may help diagnose and address the problem.