PI2104YZ_TSB

SUBSEQUENT REPAIR ACTION: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2104Y/Z) - This bulletin provides information related to the Technical Service Bulletin previously published in (PI2104) titled "Knock Sensor Detection System - ECU Logic Improvement" for 2014-2016MY Optima (TF HEV) vehicles equipped with Theta 2.4L MPI engine, produced from December 11, 2013 through July 22, 2015. Specifically, this bulletin provides instructions on which procedures to follow if, after installation of the KSDS, any one of the subject vehicles below return to the dealer with Diagnostic Trouble Code (DTC) P1326 (Knock Signal Range/Performance).