Two problems related to tank filler pipe and cap have been reported for the 1998 Kia Motor Sephia. The most recently reported issues are listed below.
The fuel cap was loose because the cap seal was missing, as a result the check engine light illuminated. Nlm.
Consumer experiencing ongoing problem with fuel siphoning itself out of filler neck whenever vehicle is 1/8 from being full. Dealer/mfr. Notified and informed consumer that they are aware of this problem and are trying to find a solution.