# P1326 on the 2015 Kia Optima

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name P1326

- [11010513](https://open.wenmarpro.com/bulletins/11010513), 2024-11-13: TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: SUBSEQUENT REPAIR ACTION: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI2104Y/Z\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. 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 \(Knock Signal Range/Performance\).
- [10252085](https://open.wenmarpro.com/bulletins/10252085), 2024-04-03: TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802Y/Z\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information related to the Technical Service Bulletin previously published PI1802 titled "Knock Sensor Detection System \- ECU Logic Improvement"; equipped w/THETA II engine. Specifically, this bulletin provides instructions on which procedures to follow if, after installation of the KSDS, any one of the subject vehicles below returns to the dealer with Diagnostic Trouble Code \(DTC\) P1326 \(Knock Signal Range/Performance\).
- [10239721](https://open.wenmarpro.com/bulletins/10239721), 2023-08-02: 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 \&\#34;Knock Sensor Detection System \- ECU Logic Improvement\&\#34; 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 \(Knock Signal Range/Performance\).
- [10205865](https://open.wenmarpro.com/bulletins/10205865), 2022-01-04: PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802Y/Z\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information related to the Technical Service Bulletin previously published PI1802 titled "Knock Sensor Detection System \- ECU Logic Improvement" equipped w/THETA II engine. Specifically, this bulletin provides instructions on which procedures to follow if, after installation of the KSDS, any one of the subject vehicles below returns to the dealer with Diagnostic Trouble Code \(DTC\) P1326 \(Knock Signal Range/Performance\).
- [10203658](https://open.wenmarpro.com/bulletins/10203658), 2021-12-01: PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802Y/Z\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information related to the Technical Service Bulletin previously published PI1802 titled "Knock Sensor Detection System \- ECU Logic Improvement" equipped w/THETA II engine. Specifically, this bulletin provides instructions on which procedures to follow if, after installation of the KSDS, any one of the subject vehicles below returns to the dealer with Diagnostic Trouble Code \(DTC\) P1326 \(Knock Signal Range/Performance\).
- [10183312](https://open.wenmarpro.com/bulletins/10183312), 2020-12-01: PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802Y/Z\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information related to the Technical Service Bulletin previously published in July 2018 \(PI1802 Rev 10, 03/16/2020\) titled “Knock Sensor Detection System \- ECU Logic Improvement” equipped w/THETA II engine. Specifically, this bulletin provides instructions on which procedures to follow if, after installation of the KSDS, any one of the subject vehicles below returns to the dealer with Diagnostic Trouble Code \(DTC\) P1326 \(Knock Signal Range/Performance\).
- [10177731](https://open.wenmarpro.com/bulletins/10177731), 2020-08-03: PRODUCT IMPROVEMENT CAMPAIGN \- ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802Y/Z\_Rev3\) \- This bulletin has been revised to include additional information. \- This bulletin provides information related to the Technical Service Bulletin previously published in July 2018 \(PI1802 Rev 10, 03/16/2020\) titled "Knock Sensor Detection System \- ECU Logic Improvement".
- [10177730](https://open.wenmarpro.com/bulletins/10177730), 2020-08-03: PRODUCT IMPROVEMENT CAMPAIGN \- ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802Y/Z\_Rev2\) \- This bulletin has been revised to include additional information. This bulletin provides information related to the Technical Service Bulletin previously published in July 2018 \(PI1802 Rev 10, 03/16/2020\) titled "Knock Sensor Detection System \- ECU Logic Improvement".
- [10174429](https://open.wenmarpro.com/bulletins/10174429), 2020-05-05: PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802Y/Z\) \- This bulletin has been revised to include additional information. This bulletin provides information related to the Technical Service Bulletin previously published in July 2018 \(PI1802 Rev 10, 03/16/2020\) titled "Knock Sensor Detection System \- ECU Logic Improvement". 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 \(Knock Signal Range/Performance\).
- [10174388](https://open.wenmarpro.com/bulletins/10174388), 2020-05-05: PRODUCT IMPROVEMENT CAMPAIGN: TSB\_R7 \- ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 \(PI1802W/X\) \- CLOSED \- SUPERSEDED BY PI1802Y/Z.