Kia Optima Hybrid 2011–2015 — technical service bulletin
Bulletin PS338 · NHTSA communication 10109751 · issued Aug 11, 2014
Technical service bulletin
communication type
Equipment
component
2011–2015
model years
5
vehicle entries
Official summary
PITSTOP: HEATER BLOWING COLD AIR WHILE IN EV MODE - When diagnosing a concern related to the heater intermittently blowing cold air while in EV mode, check the Electric Water Pump (EWP) for the A/C system (NOT the main cooling system EWP), located on the rear of the transmission (A), for proper operation. To test EWP operation, disconnect connector CHG31/C131 (B) and apply power and ground to the EWP.
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.