One problem related to crankcase (pcv) has been reported for the 2004 Hyundai XG350. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Hyundai XG350 based on all problems reported for the 2004 XG350.
: the contact stated while traveling various speeds, the check engine light illuminated 6 different times. The vehicle was taken to the dealer on 6 occasions, but the problem could not be determined. On one visit, the pcv valve was replaced, but the problem persisted. On the other 5 visits, the vehicle's codes were reset, but the problem persisted.