GROUP
ENG

MODEL
See Model
List on Page 1

NUMBER
205 (Rev 1, 04/10/2019)

DATE
April 2019

TECHNICAL SERVICE BULLETIN
SUBJECT:

SERVICE ACTION: WIRING SIGNAL INTERFERENCE
CHECK & ENGINE NOISE INSPECTION (SA379)

 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 an expanded diagnostic test that is now required on a
number of vehicles previously diagnosed with Diagnostic Trouble Code (“DTC”) P1326. Using the
procedures published in TSB PI1802W/X and PI1803W/X, the subject vehicles were diagnosed and
determined to require an engine replacement and are currently being held at dealers pending repair.
As a result of additional field data collection and analysis, the initial diagnosis method has been updated
to improve test result accuracy. Prior to performing an engine replacement on any of the VINs affected
by this Service Action, the engine condition needs to be re-assessed utilizing an updated/expanded
diagnostic process. Follow the procedure outlined in this bulletin to determine the engine’s condition and
then complete the repair by reverting back to TSB PI1802W/X and PI1803W/X (depending on
model/model year) for instructions to either install the wiring harness or to replace the engine.
Before conducting the procedure, verify that the vehicle is included in the list of affected VINs.
Campaign
PI1802W/X

PI1803W/X

Year

Model

Engine

Production Date

2014
2015-2018
2014-2018
2015-2018
2011-2013
2014
2011-2013
2012-2014

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

2.4L GDI
2.4L & 2.0L T-GDI
2.4L & 2.0L T-GDI
2.4L & 2.0L T-GDI
2.4L & 2.0L T-GDI
2.4L & 2.0L T-GDI
2.0L T-GDI
2.4L 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
8/12/10 – 9/27/13
8/28/13 – 5/15/14
12/30/10 – 8/30/13
4/19/11 – 2/10/14

 NOTICE
A Service Action is a repair program without customer notification that is performed during
the warranty period. Any dealer requesting to perform this repair outside the warranty period
will require DPSM approval.
Repair status for a VIN is provided on WebDCS (Service → Warranty Coverage → Warranty
Coverage Inquiry → Campaign Information). Not completed Recall / Service Action reports
are available on WebDCS (Consumer Affairs → Not Completed Recall → Recall VIN → Select
Report), which includes a list of affected vehicles.
This issue number is SA379.

File Under:
Circulate To:

X General Manager


X Service Advisors


X Technicians


X Service Manager


X Parts Manager


X Body Shop Manager 
X Fleet Repair


Page 2 of 13

SERVICE ACTION: WIRING SIGNAL INTERFERENCE
CHECK & ENGINE NOISE INSPECTION (SA379)

SUBJECT:

 IMPORTANT
All parts orders will be validated by the KDS test results (Wiring Signal Interference Test
AND Engine Noise Test) per this bulletin. Only parts orders with valid test results or
Techline approval will be allocated. If test results are not confirmed via KDS within
fourteen (14) business days of the launch of this bulletin or the Parts order (whichever is
later), the parts order may be deleted.
ALL claims for engine or harness replacement without the required diagnostic
inspection/results or authorization are subject to claim chargeback/denial without
exception.

Flow Chart:
DTC P1326
present

Engine seized/
severely knocking

Perform Wiring Signal
Interference Check
Procedure (page 3)

Pass

Perform Engine
Replacement
Procedure (with
Techline Authorization)
(see PI1802W/X or
PI1803W/X)
Fail

Clear DTC P1326 with
Engine ON (if stored)

Install KS
extension harness
(see PI1802W/X
or PI1803W/X)

Perform ECU update for
KSDS Software Installation
according to PI1802/PI1803

Perform Wiring Signal
Interference Check
Procedure (page 3)

Perform Engine Noise
Inspection
(page 5)

Pass

Install KS
extension harness
(see PI1802W/X
or PI1803W/X)

Pass

Fail

No further
action required

Install KS extension
harness
(see PI1802W/X or
PI1803W/X)

Fail

Perform Engine
Replacement Procedure
NO TECHLINE
AUTHORIZATION
REQUIRED!
(see PI1802W/X or
PI1803W/X)

Clear DTC P1326
with Engine ON

Note: If any concerns arise after completing the flow chart, open a Techline case online.
PI1802W/X: Wiring Harness Install – page 12; Engine Replacement – page 17
PI1803W/X: Wiring Harness Install – page 12; Engine Replacement – page 16
TSB: SA379 (Rev 1) Multiple Models April 2019

Page 3 of 13
SUBJECT:

SERVICE ACTION: WIRING SIGNAL INTERFERENCE
CHECK & ENGINE NOISE INSPECTION (SA379)

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 or was 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 in PI1802W/X
(page 17) or PI803W/X (page 16)
(with Techline authorization per Flow
Chart).

2.

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

3.

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

4.

Select Engine Control → Wiring Signal
Interference Check.

TSB: SA379 (Rev 1) Multiple Models April 2019

Page 4 of 13
SUBJECT:

5.

SERVICE ACTION: WIRING SIGNAL INTERFERENCE
CHECK & ENGINE NOISE INSPECTION (SA379)

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
(PI1803) has previously been completed.

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).

TSB: SA379 (Rev 1) Multiple Models April 2019

Page 5 of 13
SUBJECT:

7.

SERVICE ACTION: WIRING SIGNAL INTERFERENCE
CHECK & ENGINE NOISE INSPECTION (SA379)

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”, clear DTC P1326
and then proceed to the Engine Noise
Inspection procedure below.

 NOTICE
DTC P1326 must be cleared in
order to perform the Engine
Noise Inspection Procedure.


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
PI1802W/X (page 12) or PI803W/X
(page 12).

Engine Noise Inspection Procedure:
1. Prior to inspection, ensure the KDS is
fully charged and is connected to the
internet every day to ensure the latest
update is received and installed.




Engine oil level should be at the “FULL”
mark. Top off with 5W-30 if required.
Test requires the engine to be in
satisfactory running condition and able
to idle normally.
Engine coolant temperature should be
above minimum test temperature:
185°F (85°C).

If the engine’s running condition is poor due to issues unrelated to a connecting rod knocking noise (faulty
sensors, intake/exhaust manifold leak, catalytic converter, etc.), diagnose and repair prior to performing this
inspection procedure. If the engine cannot be tested or has other major concerns, see Warranty Claim
Authorization information on PI1802W/X (page 40) or PI1803W/X (page 30).

TSB: SA379 (Rev 1) Multiple Models April 2019

Page 6 of 13
SUBJECT:

2.

SERVICE ACTION: WIRING SIGNAL INTERFERENCE
CHECK & ENGINE NOISE INSPECTION (SA379)

With the engine off, remove the dipstick
(A).

 NOTICE
A

Engine cover removed in
images for demonstration-only
purposes.

3.

Insert the engine noise tester SST
adapter (B) into the dipstick tube then
start and idle the engine.

D

E

 NOTICE
To avoid false readings, ensure
the adapter (B) is properly
inserted into the dipstick tube
and that the tube is not in
contact
with
the
intake
manifold.

C

B

If the dipstick tube is not
centered and is close to or
touching the manifold, carefully
adjust (bend) and center the
dipstick tube with a pry bar.

B
Not Centered

Centered

Click here for a video tutorial of the
Inspection Procedure.
4.

Connect the 3.5 mm male end of the
engine noise tester SST (C) to the 3.5
mm female end of the extension cable
(D).

TSB: SA379 (Rev 1) Multiple Models April 2019

C

D

Page 7 of 13
SUBJECT:

5.

SERVICE ACTION: WIRING SIGNAL INTERFERENCE
CHECK & ENGINE NOISE INSPECTION (SA379)

Attach the SST clip of the extension
cable (D) to the hood latch.

D

 NOTICE
Make sure to route the
extension cable away from
moving parts (pulleys, fan, and
belts and be careful not to get it
pinched between door and body
or window, etc.).