Kia Cadenza 2014–2017 — technical service bulletin
Bulletin PS472R1 · NHTSA communication 10109781 · issued Nov 15, 2016
Technical service bulletin
communication type
Electrical System
component
2014–2017
model years
16
vehicle entries
Official summary
PITSTOP: HVAC VENTILATION LOGIC OPERATION - Starting with 14MY Soul (PS) (with the exception of PSEV) and complete new models such as K900 (KH), Sedona (YP), Sorento (UMa), Optima (JFa), Sportage (QL), and 17MY Forte (YD, YDm), etc., equipped with a sunroof, a ventilation logic has been applied in order to prevent exhaust gases flowing into the vehicle due to the pressure difference (inside vs outside) that is generated when driving with the sunroof open. This logic allows the system to automatically switch from RECIRCULATION to FRESH mode when the sunroof is open.
Vehicles covered
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.