GROUP

MODEL

Subsequent Repair Action

2014-2016MY
Optima (TF HEV)
w/2.4L MPI

NUMBER

DATE

PI2104Y/Z (Rev 1, 11/07/2024)

July 2023

SUBSEQUENT REPAIR ACTION
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS
FOR DTC P1326 (PI2104Y/Z)

 NOTICE
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).
If DTC P1326 is present, first perform the bearing clearance inspection with the Engine Bearing Clearance
Tester device (SST KQ231-2T110QQK). This device checks the rod bearing clearance by placing air and
vacuum into the cylinder block. Measure the bearing clearance and follow the instructions in this bulletin.
Before conducting the procedure, verify the vehicle is included in the list of affected VINs.
A Vehicle Diagnosis Number (VDN) must be created with or without DTC P1326, after scanning for DTCs, prior
to performing PI2104Y/Z. If a VDN is not created, Warranty claim submission issues WILL occur.

 NOTICE
To assure complete customer satisfaction, always remember to refer to KDealer+ Warranty
Coverage (validation) Inquiry Screen (Service → Warranty Coverage → Warranty Coverage Inquiry)
for a list of any additional campaigns that may need to be performed on the vehicle before returning
it to the customer.

A printed copy is for reference only; publication information can be updated at any time.
Always refer to KGIS for the latest information. After logging in kdealer.com, the newest technical
publications are listed in ‘Service Releases’ and has the latest service information that has been released.
Kia America, Inc. Internal Use Only

Page 2 of 16

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2104Y/Z)

SUBJECT:

Main Flowchart:

 IMPORTANT
Certain limitations may apply to this Subsequent Improvement Campaign coverage. Refer to
Warranty Bulletin 2023-18 for more details. Before starting inspection/repairs related to this
publication, vehicle ownership needs to be verified by completing the Ownership Validation Form

Vehicle In
Validate Warranty
Confirm customer complaint as listed on the RO and
note on the RO if vehicle was towed in.
Validate Ownership
Initiate a T/L case if the vehicle has a salvage title,
belongs to a used car dealer, franchise, or auto auction.

NO

PI2104 KSDS Installed

YES
Oil Dipstick/Oil Cap & Oil
Filler Opening Inspection

Oil Inspection

Using KDS, record video and
take (3) photos of:

(OK)

1. Oil Dipstick Reading
2. Inside Oil Filler Cap
3. Inside Oil Filler Opening

Oil Inspection

(NG)

Open Techline
Repair Assistance (RA)
Be prepared to submit all
required documentation.
(Refer to Appendix 1)

(Refer to Page 3 & Appendix 1
for additional instructions)

Refer to the applicable
Flowchart:
A. DTC P1326 Stored
B. Engine Noise
C. Engine No Crank

Maintenance
Verified

YES

Appendix 2
(Action Required)

Techline Verification of
Proper Maintenance
Per Appendix 1
Not Available/Insufficient

OK

Request Maintenance
Records from Customer
In Writing
Receipt Due Within 10 Days

NG
No Repair Coverage
Diagnosis Claim Only
‘PI210S’
Vehicle Out

Follow the applicable flowchart upon documenting customer complaint for one (1) of the three (3)
following concerns from Main Flowchart:
A.

DTC P1326 Stored… (Page 4)

B.

ENGINE NOISE… (Page 5)

C.

ENGINE, NO CRANK… (Page 6)

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: PI2104Y/Z (Rev 1) Optima (TF HEV)Kia
July
2023 Inc. Internal Use Only
America,

Page 3 of 16
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2104Y/Z)

Oil Condition and Oil Level Inspection: (Main Flowchart)
1.

Start video showing vehicle and move in
towards the dash VIN tag.

2.

Measure and record oil dip stick level.

3.

Note oil dip stick reading on the RO.

4.

Take a picture of the oil reading on dipstick.
Inspect the inner/bottom of the oil cap and

5.

inside oil filler opening.
Take a picture of both, the bottom of the oil

6.

cap and oil filler opening.
Record/Note findings: No oil, oil sludge,
varnish, burnt oil smell condition(s) found.

 NOTICE
If NO oil is registered on the dipstick,
or oil lacquering, oil sludge and/or oil
varnish is present (NG), then the
engine

is

therefore

suspect

to

maintenance neglect. Review of the
vehicle's

maintenance

history

is

required.
If suspect, proceed to the ‘Oil Level
Measurement’ instructions below and
submit with the Techline case.

Oil Level Measurement: (Main Flowchart → PWA Request) NO OIL READING ON DIPSTICK
1.

Remove oil filler cap, remove oil drain plug
and drain oil into the measuring container
SST067BUCK and check oil level.

2.

Record oil level reading on the RO.

3.

Take photo of the drained oil container using
KDS and attach to warranty claim PWA
request.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB:
(Rev 1) Optima (TF HEV) July 2023
Kia America, Inc. Internal
UsePI2104Y/Z
Only

Page 4 of 16
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2104Y/Z)

A. DTC P1326 Stored
Create PI2104Y Claim – No Techline PWA Required

1. Full system DTC scan and
generate VDN
2. Save Freeze frame Data

From Main Flowchart
(page 2)

Perform BCT

BCT Result

PASS
(OK)

Replace
Knock Sensor
(Page 7)

Repair Completed

No

KSDS Software
Update available

NO PASS
(NG)

Check for updated
software

Yes
Replace
Engine
(Page 7)

KDS Software
Update

Yes

No

KSDS Software
Update available

Check for updated
software

Note: If any concerns arise during/after completing the flow chart(s), open a Techline case online.

 IMPORTANT
Due to recent updates to KDS, always follow the BCT procedure instructions outlined in KDS. You
may also refer to SST067 for BCT Procedure/Calibration information.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: PI2104Y/Z (Rev 1) Optima (TF HEV)Kia
July
2023 Inc. Internal Use Only
America,

Page 5 of 16
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2104Y/Z)

B. Engine Noise
Techline PWA Required; Diagnosis Only Campaign Possible

From Main Flowchart
(page 2)

Full system DTC scan
and generate VDN.

Perform BCT

BCT Result

PASS
(OK)

NO PASS
(NG)

Process Completed

No

KSDS Software
update available

Yes

KDS Software
Update

Replace Engine
(Page 7)

PWA PROCESS

Check updated
software

Diagnosis coverage
only; any required
repairs are to be
completed using
normal service
procedures.
Do Not Submit as a
Campaign Claim.

Refer to PI2104
(As Applicable)

Yes

Connecting
rod bearing
noise?

No

PI210S

Note: If any concerns arise during/after completing the flow chart(s), open a Techline case online.

 IMPORTANT
Due to recent updates to KDS, always follow the BCT procedure instructions outlined in KDS. You
may also refer to SST067 for BCT Procedure/Calibration information.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB:
(Rev 1) Optima (TF HEV) July 2023
Kia America, Inc. Internal
UsePI2104Y/Z
Only

Page 6 of 16
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI2104Y/Z)

C. Engine No Crank
Techline PWA Required; Diagnosis Only Campaign Possible

From Main Flowchart
(page 2)

Full system DTC scan
and generate VDN

Remove engine
drive belt and spark