Kia Optima 2011–2015 — technical service bulletin
Bulletin PS322 · NHTSA communication 10109658 · issued May 22, 2014
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2015
model years
5
vehicle entries
Official summary
PIT STOP: DTC P0456 AND CHARCOAL CANISTER LEAKS - When addressing a concern related to a DTC P0456 (Evaporative Emissions System ? Small Leak Detected), and an inspection of the vapor lines, connections and fuel cap reveal no abnormalities, closely inspect the mounting holes of the charcoal canister for visible cracks.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.