GROUP
Product Improvement

MODEL
See Model List
on Page 1

NUMBER
PI1802W/X (Rev 2, 01/28/2018)

DATE
October 2018

PRODUCT IMPROVEMENT CAMPAIGN
ENGINE REPLACEMENT INSTRUCTIONS
FOR DTC P1326 (PI1802W/X)

SUBJECT:

 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 July 2018 (PI1802, Rev 5, 12/20/2018) 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.
Year

Model

Engine

Production Date

2014

Optima (TF)

2.4L GDI

2015-2018
2014-2018
2015-2018

Optima (TF/QF/JF/JFa)
Sportage (SL/QL)
Sorento (XMa/UMa)

2.4L & 2.0L T-GDI
2.4L & 2.0L T-GDI
2.4L & 2.0L T-GDI

8/29/13 – 4/25/14
4/16/14 – 7/11/18
9/30/13 – 4/5/18
1/3/14 – 3/7/18

If DTC P1326 is present, first check for any wiring signal interference following the procedure
set forth below before determining whether an engine replacement is necessary. Based on the
results of the Wiring Signal Interference Check, dealers are to perform either the Knock Sensor
Wiring Repair or the Engine Long-Block Replacement according to the procedures in this TSB.
If the vehicle’s engine is already seized or severely knocking, dealers are to perform the
Engine Long-Block Replacement and the Wiring Signal Interference Check according to the
procedures in this TSB.
A Vehicle Diagnosis Number (VDN) must be created with DTC P1326, prior to performing
PI1802W/X. If a VDN is not created, Warranty claim submission issues may occur.
Before conducting the procedure, verify the vehicle is included in the list of affected VINs.

 NOTICE
To ensure complete customer satisfaction, always remember to refer to WebDCS
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.

File Under:
X General Manager

X Service Advisors
X Technicians



Circulate To:

X Service Manager
X Parts Manager


X Body Shop Manager  Fleet Repair


Page 2 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

Flow Chart:
DTC P1326
present

Engine seized/
severely knocking

Perform Wiring Signal
Interference Check
Procedure (page 2)

Perform Engine
Replacement
Procedure (page 10)
(with Techline
Authorization)

Pass

Fail

Perform Engine
Replacement Procedure
(page 10)
NO TECHLINE
AUTHORIZATION
REQUIRED!

Install KS extension
harness
(page 5)

Perform ECU update for
KSDS Software Installation
according to PI1802

Perform Wiring Signal
Interference Check
Procedure (page 2)

Pass

Fail

No further
action required

Install KS
extension
harness
(page 5)

Clear
DTC P1326

Wiring Signal Interference Check Procedure:
1. Using the KDS (connected to the
internet), perform a Fault Code Search
and confirm DTC P1326 is present.
 If P1326 is present, proceed to the
next step to perform the wiring signal
interference check.
 If the engine is seized or severely
knocking, proceed to the engine
replacement procedure on page 10.

2.

Start/warm up the engine and ensure
ENGINE OIL is at operating temperature
(176°F).

TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 3 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

3.

From the KDS Home Screen, select S/W
Management.

4.

Select Engine Control → Wiring Signal
Interference Check.

5.

Ensure the engine is on and at idle and
ENGINE OIL temperature is at 176°F
degrees or higher. Select OK to proceed.

5b. Select OK to proceed.
NOTE: This test should only be
performed if Knock Sensor Detection
System - ECU Logic Improvement
(PI1802) has previously been completed.

TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 4 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

5c. If the conditions are not met, a pop-up as
shown will be displayed.

6.

Enter vehicle mileage and RO number
(VIN is automatically populated).

7.

Wiring Signal Interference Check test will
begin and take about three (3) minutes to
complete. NOTE: Do not push on the
accelerator pedal.



If the result is “OK”, turn the engine
off and proceed to the Engine
Replacement procedure on page 10.



If the result is “NOT OK”, turn the
engine off and proceed to step 2 of
the Knock Sensor (KS) Extension
Harness Installation procedure on
page 5.

TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 5 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

KS Extension Harness Installation Procedure:
NOTE: Photos below are from a 15MY Optima (QF). Components and their location may vary in different models.

1.

Inspect the ECU harness (A) and verify if
the Knock Sensor wiring extension
harness (B) has previously been
installed.

A
B

NOTE: To identify the extension harness
(B), look for an external harness (B)
which should be cable-tied to the existing
wiring harness (A) leading by the intake
manifold (C) to the knock sensor (D), as
shown.



2.

If the extension harness (B) has been
installed, open a Techline case
online.
If the extension harness (B) has not
been installed, proceed to the next
step.

Remove the
assembly (E).

air

cleaner

and

C

D

duct

E

3.

Disconnect the ECU connector (F).

F

TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 6 of 33
SUBJECT:

4.

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

Cut the existing cable-tie (G) from the
connector.

G

5.

Remove the ECU connector cover (H) by
carefully unclipping the two (2) tabs (I)
and sliding the cover (H) towards the
tabs (I).

H

I

6.

Carefully remove the electrical tape (J) to
expose the harness wires.

J

7.

Remove the pin retainer (K).

K

TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 7 of 33
SUBJECT:

8.

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

Locate the three (3) knock sensor circuit
terminals from the ECU connector (F).
Refer to the “Schematic Diagrams →
Engine Electrical System → Engine
Control System → Schematic Diagrams”
chapter of the applicable ETM on KGIS.
Pin
44
45
62

QF, TF, XMa, and SL
Wire
Knock Sensor Shielded Ground
Knock Sensor Ground
Knock Sensor Interface (Signal)

Pin
61
62
63

UMa, JF, JFa, and QL
Wire
Knock Sensor Shielded Ground
Knock Sensor Ground
Knock Sensor Interface (Signal)

F
QF /
TF

F
XMa /
SL

F
JF /
JFa /
QL

Click here to see a video of
terminal removal.

F
UMa

9.

Remove the three (3) terminals one at a
time and insert the new terminals of the
extension harness into the ECU
connector (F). Reinstall pin retainer (K)
and reassemble the connector (F).
Pin
44
45
62

QF, TF, XMa, and SL
Extension Wire Color
Blue
Black
Red

Pin
61
62
63

UMa, JF, JFa, and QL
Extension Wire Color
Blue
Black
Red

F

NOTE: Be sure to note the rotational
position of the terminals during
removal. They are directional and need
to be reinstalled in the same “clock”
position.
TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 8 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

10. Route the extension harness (B) along
the existing harness (A) leading by the
intake manifold (C) to the knock sensor
(D), as shown.

C
D
 IMPORTANT
The harness (B) must be routed
above and secured to the
harness protector (L1) and
UNDER the Breather Hose (L2)
and Camshaft Position Sensor
(L3).

L1
L3
L2

11. Connect the extension harness (B) to the
knock sensor (D).

D
B

12. Cut off and discard the three (3) old knock sensor circuit terminals and the old knock
sensor connector and secure the remaining wires to the new extension harness using the
supplied electrical tape. NOTE: Complete removal of the old knock sensor wires is not
necessary. Only remove the old terminals and connector.

TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 9 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

13. Secure the extension harness at the
connector (F) by replacing the cable-tie
(G) removed in step 4 with a new
supplied cable-tie and the electrical tape
(J) removed in step 6 with new supplied
electrical tape.

G
F

J

14. Secure the extension harness (B) to the
existing harness (A) using the supplied
cable-ties. Tuck and secure any excess
wiring of the extension harness near the
ECU with cable-tie.

A
B
B

A
15. Reinstall all removed components in the reverse order of removal.

16. Erase the P1326 DTC with the KDS and start the engine to confirm proper operation.

TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 10 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

Engine Replacement Procedure:
1.

Remove the engine assembly by
referring
to
the
“Engine
And
Transmission (Transaxle) Assembly →
Engine And Transmission (Transaxle)
Assembly → Repair procedures” chapter
in the applicable Shop Manual on KGIS.

Refer to TSB ENG190 for information
regarding engine replacement practices.

2.

After removal of the engine from the vehicle, remove all components that will need to be
transferred by referring to the applicable Shop Manual on KGIS.

3.

Place the new engine block on an engine stand.

4.

Install all removed components from the old engine block onto the new engine block
utilizing all parts from Service Kit I and II. Be advised of notes below.

Notes:
High Pressure Pump & Roller Tappet:
 Refer to TSB ENG083 for special
attention and handling procedures of
GDI-specific components.
 When installing the high pressure
pump and roller tappet onto the new
engine, apply engine oil to the roller
tappet, and O-rings of the high
pressure pump.
Tightening torques of pump bolts:
9.4 – 10.9 lb.ft (12.8 – 14.7 N.m,
1.3 – 1.5 kgf.m)
Tightening torques of pipe flare nut:
19.5 – 23.9 lb.ft (26.5 – 32.4 N.m,
2.7 – 3.3 kgf.m)

 NOTICE
Refer to TSB ENG083 for gasoline direct injection (GDI) specific information, including
related warnings and cautions for handling high fuel pressure system components.
TSB: PI1802W/X (Rev 2) Multiple Models October 2018

Page 11 of 33
SUBJECT:

ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802W/X)

High Pressure Fuel Pipe:
1. Properly position the new fuel pipe
(A) and then hand-tighten both flare
nuts (B).

B
A

2. Install the pipe retaining bracket and
bolt (C) and torque to specifications.

 NOTICE
If the bracket and bolt are
missing, order and install a new
bracket and bolt.