WenmarOpen by Wenmar Pro

Service bulletin PI1803WX_TSB_R5

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10168951
Published by NHTSA2019-12-09
Manufacturer's numberPI1803WX_TSB_R5
Manufacturer's date2019-11-07
NHTSA componentELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING

NHTSA's summary

TSB: PRODUCT IMPROVEMENT CAMPAIGN PI1803W/X_R5: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1803W/X) - This bulletin has been revised to include additional information. This bulletin provides information related to the Technical Service Bulletin previously published in November 2018 (PI1803, Rev 1, 01/02/2018) 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 returns to the dealer with Diagnostic Trouble Code ("DTC"), P1326.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Equipment and accessories, Labels and manuals

Trouble codes named

P1326

Vehicles listed
KIA OPTIMA2011, 2012, 2013, 2014
KIA SORENTO2012, 2013, 2014
KIA SPORTAGE2011, 2012, 2013

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20245492024-08-15. Label
20232752023-05-08. Electrical
20214242021-07-09. Engine
20210402021-02-01. Engine
20205972020-12-04. Engine
20V7500002020-12-02. ENGINE
20191532019-03-21. Engine
20191432019-03-18. Engine
20190992019-02-27. Engine
19V1010002019-02-15. ENGINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB_CLI049_R22026-09-02. Service bulletin. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR - 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 regarding the partial repair of the Air Conditioning (A/C) compressor assembly on some 2011MY~ Optima Hybrid (TF HEV, JF HEV/PHEV), 2015MY~ Soul EV (PS EV), 2017MY~ Niro (DE HEV/PHEV/EV), 2022MY~ EV6 (CV), 2021MY~ Sorento (MQ4 HEV/PHEV), 2023MY~ Sportage (NQ5 HEV/PHEV), and 2023MY~ Niro (SG2 EV/HEV/PHEV) vehicles.
SC269_OWNR_4012026-07-21. Service campaign. VOLUNTARY SERVICE CAMPAIGN: OWNER RENOTIFICATION (SC269 FLIGHT #401) - This document is the owner renotification advising that Kia is conducting a Voluntary Service Campaign to inspect and, if necessary, replace the high-voltage fuse in 2013-2016 MY Optima Hybrid vehicles.
WTY026_TSB_R22026-04-01. Service bulletin. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: OIL PRESSURE SWITCH (OPS) REPLACEMENT (WTY026 REVISION 2) - 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 regarding the replacement of the Oil Pressure Switch associated with the ‘Warranty Extension Program’ (WTY026) on some 2014-2018MY vehicles listed in the table below, for repairs that may be necessary to address an Oil Pressure Switch leak in the eligible vehicles listed below from 10 years/100,000 miles to 15 years/150,000 miles, whichever comes first, starting from the date the vehicle was first put into service. This warranty extension is to address the Oil Pressure Switch leaking condition at no cost to the customers during this extended warranty period.
PI2104_OWNR_5012026-03-31. Other. PRODUCT IMPROVEMENT CAMPAIGN: OWNER RENOTIFICATION (PI2104 FLIGHT 501) - This document is the owner renotification advising that Kia is conducting a Product Improvement Campaign to perform a software update on 2014-2016 MY Optima Hybrid vehicles equipped with 2.4-liter MPI engines to protect the engine from excessive connecting rod bearing damage. The update will be done free of charge and will only involve the addition of newly developed computer software for the Engine Control Unit (“ECU”).
PI2103_OWNR_5012026-03-12. Other. PRODUCT IMPROVEMENT CAMPAIGN: OWNER RENOTIFICATION (PI2103 FLIGHT #501) - This document is the owner renotification advising that Kia is conducting an important Product Improvement Campaign to perform a software update on 2011-2013 MY Kia Sportage vehicles equipped with 2.4-liter MPI engines to protect the engine from excessive connecting rod bearing damage. The update will be done free of charge and will only involve the addition of newly developed computer software for the Engine Control Unit (“ECU”).
WTY039_TSB_R72025-12-24. Service bulletin. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039 - REVISION 7) - 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 associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB_R62025-12-10. Service bulletin. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039 REVISION 6) - 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 associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB_R52025-11-20. Service bulletin. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN (WTY039) - 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 associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB_R42025-10-09. Warranty extension. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY: INSPECTION/REPLACEMENT (WTY039) - 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 associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
PI2104_OWNR_4012025-07-23. Other. PRODUCT IMPROVEMENT CAMPAIGN: OWNER RENOTIFICATION (PI2104) - This document is the owner renotification advising that Kia is conducting a Product Improvement Campaign to perform a software update on 2014-2016 MY Optima Hybrid vehicles equipped with 2.4-liter MPI engines to protect the engine from excessive connecting rod bearing damage. The update will be done free of charge and will only involve the addition of newly developed computer software for the Engine Control Unit (“ECU”).