One problem related to tank filler pipe and cap has been reported for the 2002 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Hyundai Elantra based on all problems reported for the 2002 Elantra.
My Elantra's issue is with the gas tank getting over-filled at the gas pump due to a system failure that allows the pump to fill the car until the gas reaches the fuel spigot and then shutting off. Not only does this result in gasoline pouring out of the filler cap, but it also floods the entire gas tank evaporation system. As a result of this, after the car has sat for several hours gas starts draining from the emission canister, leaving a 1 to 2 gallon fuel spill and causing the car to stall or run rough. The entire system ,including the canister, sensor, and solenoid was replaced in August 2008. On September 3 2008 I filled the car up with fuel and the car repeated the same symptoms. The dealership is replacing the parts but insist that the problem is filling the car with fuel too quickly. I strongly feel that this is a serious design flaw if the car cannot handle getting fuel at a pump without causing serious and expensive damage, and is an extreme safety hazard to allow these cars to be driven with the likelihood of a sizable flammable spill in spite of having all maintenance done on schedule by the dealership. I contacted Hyundai's corporate office and they consider this a previously unreported issue.