Sorry, the NHTSA has not posted this TSB document yet.
You can still get the detailed info from Hyundai for this TSB. Call your local Hyundai dealer's service department & ask for a copy of TSB# TSB-10-FL-010.
Affected Component: ENGINE AND ENGINE COOLING:ENGINE
HYUNDAI: DTC P2135/P0638 OR COLD ENGINE RPM FLUCTUATION; TPS REPLACEMENT AND ECM UPDATE. SOME 2.7L, 3.3L OR 3.8L ENGINES IN MODELS IDENTIFIED IN THE APPLICABILITY LIST MAY EXPERIENCE ONE OR MORE OF THE CONDITIONS LISTED. *PE