Service bulletins for the 2012 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.
294 on file from NHTSA, as of 2026-10-19.
About P1744 on the 2012 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
| TSBTRA068_CLOSED | 2018-09-10. 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 |
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| TSBTRA068 | 2017-11-14. 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.