P1326 on Kia vehicles
P1326 is named on 24 Kia model years (2016–2022): 195 manufacturer filings and 115 owner reports in NHTSA’s files, across Optima, Sorento, Sportage, Soul, Forte.
Which Kia model years name P1326
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2016 Kia Optima | Engine | 20 | 16 |
| 2017 Kia Optima | Engine | 19 | 14 |
| 2018 Kia Optima | Engine | 19 | 7 |
| 2017 Kia Sorento | Engine | 18 | 8 |
| 2018 Kia Sportage | Engine | 18 | 6 |
| 2018 Kia Sorento | Engine | 18 | 5 |
| 2017 Kia Sportage | Engine | 18 | 4 |
| 2016 Kia Sorento | Engine | 18 | 4 |
| 2020 Kia Optima | Engine | 3 | 17 |
| 2016 Kia Sportage | Engine | 18 | — |
| 2016 Kia Soul | Engine | 5 | 11 |
| 2016 Kia Forte | Engine | 5 | 2 |
| 2019 Kia Optima | Engine | 4 | 2 |
| 2018 Kia Soul | Engine | 2 | 4 |
| 2019 Kia Sorento | Engine | 1 | 3 |
| 2017 Kia Soul | Engine | 2 | 2 |
| 2020 Kia Sportage | Engine | — | 3 |
| 2019 Kia Soul | Engine | 2 | 1 |
| 2017 Kia Forte | Engine | 2 | 1 |
| 2021 Kia Sportage | Engine | — | 2 |
| 2019 Kia Sportage | Engine | 1 | 1 |
| 2018 Kia Forte | Engine | 2 | — |
| 2022 Kia Sportage | Power Train | — | 1 |
| 2020 Kia Sorento | Engine | — | 1 |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
When Kia owners report it
miles, typically
Half of the 23 Kia owner reports naming P1326 that carry an odometer reading fall between 74,000 and 117,000 miles.
What Kia owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
My 2021 Kia Sportage is in Limp Mode at 2,000 RPM, and my mechanic confirmed it has the P1326 Knock Sensor code stored
Kia filings that name P1326
Source: NHTSA manufacturer communicationsBulletins and campaigns Kia filed with NHTSA whose summary names P1326. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PI2104YZ_TSB Service bulletin2023-07-05 · Engine And Engine Cooling
- 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. Specific
- PI2104YZ_TSB_R1 Service bulletin2024-11-07 · Engine
- 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 (P
- VPI1802WX_TSB_R2 Service bulletin2019-01-28 · Engine And Engine Cooling
- PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X) - 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 5, 12/20/2018) titled ?Knock Sensor Detection System - ECU Logic Improvement?. Specifically, this bulletin provides ins
- VPI1802WX_TSB_R3 Service bulletin2019-02-11 · Engine
- VEHICLE PRODUCT IMPROVEMENT: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)- 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 6, 01/31/2019) titled ?Knock Sensor Detection System - ECU Logic Improvement?. Specifically, this bulletin provides instruc
- PI1802WX_TSB_R4 Service bulletin2019-04-03 · Engine And Engine Cooling
- TSB: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X) - This bulletin provides information related to the Technical Service Bulletin previously published in July 2018 (PI1802, Rev 6, 01/31/2019) 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 s
- PI1802YZ_TSB Service bulletin2023-08-31 · Engine And Engine Cooling
- SUBSEQUENT REPAIR ACTION: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2108Y/Z) - This bulletin provides information related to the Technical Service Bulletin previously published in (PI2108) titled Knock Sensor Detection System - ECU Logic Improvement for certain 2019-2020MY Optima P/HEV (JF P/HEV) vehicles equipped with Nu 2.0L GDI engine, produced from July 6, 2018 through October 28, 2019.
- PI2108YZ_TSB_R1 Service bulletin2024-11-08 · Engine
- TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: SUBSEQUENT REPAIR ACTION: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2108Y/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 (P
- PI2002B_TSB Service bulletin2020-08-27 · Engine And Engine Cooling
- TSB - PRODUCT IMPROVEMENT CAMPAIGN (PI2002B) - NU 2.0L GDI - KNOCK SENSOR DETECTION SYSTEM (KSDS) LOGIC IMPROVEMENT - This bulletin provides information related to a software update to the Engine Control Unit (ECU) to install the Knock Sensor Detection System (KSDS) in order to protect the engine from excessive connecting rod bearing damage. This update is for some 2014-2016MY Soul (PS) vehicles p
- PI2002YZ_TSB Service bulletin2021-04-15 · Engine And Engine Cooling
- TECHNICAL SERVICE BULLETIN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2002Y/Z) - This bulletin provides information related to the Technical Service Bulletin previously published in January 2021 (PI2002A and PI2002B, August 2020) titled "Knock Sensor Detection System - ECU Logic Improvement". Specifically, this bulletin provides instructions on which procedures to follow if, after installat
- PI2002YZ_TSB_R1 Service bulletin2021-06-15 · Engine And Engine Cooling
- TECHNICAL SERVICE BULLETIN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2002Y/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 January 2021 (PI2002A and PI2002B, August 2020) titled "Kn
- PI2105YZ_TSB Service bulletin2022-03-23 · Engine And Engine Cooling
- SUBSEQUENT REPAIR ACTION: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2105Y/Z) - This bulletin provides information related to the Technical Service Bulletin previously published (PI2105) titled "Nu 2.0L GDI - 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
- PI2105YZ_TSB_R1 Service bulletin2024-11-07 · Engine
- TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: SUBSEQUENT REPAIR ACTION: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2105Y/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 (PI21
What P1326 means
Source: SAE J2012 / OBD-IIP1326 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. The record above is what Kia and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P1326 a known problem on Kia vehicles?
It is a documented one: NHTSA's files hold 195 manufacturer filings and 115 owner reports naming P1326 on 24 Kia model years (2016–2022). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Kia models does P1326 appear on most?
2016 Optima (36 documents), 2017 Optima (33 documents), 2018 Optima (26 documents).
Does P1326 on a Kia mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.