Idle Fluctuation Concern on Hyundai Genesis 3.8

An idle fluctuation may be noted, the Check Engine Light may or may not illuminate. Replacing the throttle position sensor and updating the powertrain control module (PCM) software will commonly correct this concern.

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Average mileage: 35,000 (34,000–36,000)
2 model years affected: 2009, 2010
4 people reported this problem
1 person shared problem details
The idle is unsteady, goes below 500 rpm at stops in traffic and fluctuates and sounds like it will stall out. Technician reloaded software and still hasn't fixed problem yet. Taking it back for service again to fix problem.
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