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Service bulletins for the 2014 Kia Optima

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

353 on file from NHTSA, as of 2026-10-19.

About P1744 on the 2014 Kia Optima: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P1744 are shown. Show all

Bulletins, newest first
TSBTRA0792018-09-10. Service bulletin. POWER TRAIN. TSB: SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351) - This bulletin provides the procedure to improve the logic of the Hybrid Control Unit (HCU) and the Transmission Control Unit (TCU) on some 2013-2015MY Optima Hybrid (TF HEV) vehicles, produced from September 27, 2012 through September 5, 2014, which may experience a malfunction indicator lamp illumination with DTC P1744. To correct this concern, apply the improved logic to the HCU and TCU using the KDS ECU Upgrade function as described in this bulletin.
TSBTRA068_CLOSED2018-09-10. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. TSB: HCU/TCU LOGIC IMPROVEMENT FOR DTC P1744 (400 MESH EQUIPPED TRANSMISSIONS ONLY) - TSB TRA068 CLOSED. REFER TO TSB TRA079/SA351
TSBTRA0682017-11-14. Service bulletin. ELECTRICAL SYSTEM. TSB - HCU/TCU LOGIC IMPROVEMENT FOR DTC P1744 (400 MESH EQUIPPED TRANSMISSIONS ONLY) - This bulletin provides the procedure to improve the logic of the Hybrid Control Unit (HCU) on some 2011-2012MY Optima Hybrid (TF HEV), produced from February 15, 2011 through December 28, 2012, and both the Hybrid Control Unit (HCU) and the Transmission Control Unit (TCU) on some 2013-2015MY Optima Hybrid (TF HEV) vehicles, produced from January 15, 2013 through March 27, 2015, which may experience a malfunction indicator lamp illumination with DTC P1744. To correct this concern, apply the improved logic to the HCU only (11-12MY) or HCU and TCU (13-15MY) using the KDS ECU Upgrade function as described in this bulletin. For confirmation that the latest reflash has been applied to a vehicle you are working on, verify the ROM ID using the table on page 3 of this bulletin.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.