GROUP
ENGINE

Technical Service Bulletin
SUBJECT:

DATE
MARCH 2024

NUMBER
24-EM-002H
MODEL(S)
TUCSON (TL)

CONTINUED DTC P1326 AFTER
KSDS ENGINE MONITORING LOGIC ECU UPDATE

Description: Certain 2016-2021MY Tucson (TL) 2.0L vehicles may experience continued DTC
P1326 after the ECU update has been performed per TSB 22-01-028H-1 (or later) “ENGINE
MONITORING LOGIC (SERVICE CAMPAIGN 966)”.
Follow the service procedure outlined in this bulletin to repair this condition.
Applicable Vehicles:
• 2016 - 2021MY Tucson (TL) 2.0L vehicles with Service Campaign 966 already completed.
Service Process Flowchart:

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT: CONTINUED DTC P1326 AFTER KSDS ENGINE MONITORING LOGIC ECU UPDATE

Service Procedure:

STUI
This TSB includes Repair validation photos. Refer to the latest Digital Documentation Policy for
requirements.
1. Confirm with GDS scan tool that DTC P1326 exists and perform Engine Mechanical Pre-Check
inspection steps listed below.
 This must be done to resolve any contributing factors that may result in DTC P1326.
 Perform ALL inspections listed and correct, as necessary.
 This TSB only applies if DTC P1326 condition exists.
*** ENGINE MECHANICAL PRE-CHECK ***
2. Check engine oil condition.
 Engine oil must be CLEAN with oil change maintenance work performed within the last
3,000 miles/6 months and topped off to the “F” mark.
3. Check coolant level.
 If coolant level is low or coolant condition is poor, top off or replace as needed.
4. Spark Knock/Pre-ignition due to fuel quality or combustion chamber deposits.
 If engine has spark knock/pre-ignition during acceleration and throttle tip-in, check for fuel
quality/contamination, and combustion chamber deposits.
 If fuel quality issue or a combustion chamber deposit condition was found and resolved, be
sure to reset the engine adaptive values prior to vehicle retest.
5. Knock Sensor installation quality and connection.
 Installation to the block must be on a cleaned casting surface and with the correct
tightening torque.
 Knock sensor connection to the engine harness must be free of any pin corrosion or
intermittent contact concern due to debris/water.
 Clean the 2 pin connection points with an electrical contact cleaner and compressed air.
6. PASSES BCT Inspection with NO abnormal engine noises.
 Engine passes Bearing Clearance Test per TSB 22-01-023H-2 (or later) “DTC P1326 –
ENGINE BEARING INSPECTION / ENGINE REPLACEMENT (SERVICE CAMPAIGN
T6G)”.
 Diagnose and resolve the source of any observed abnormal engine noise. Some
mechanical sounds are normal. Compare with like vehicle/engine.
NOTE: Apply the appropriate Op Code according to the Inspection Op Code Table per TSB
22-01-024H-2 (or later) “OP CODE/PART NUMBER (REFERENCE GUIDE FOR SERVICE
CAMPAIGN T6G)”
7. After steps 2-6 above for have been performed with all necessary adjustments and repairs made,
retest the vehicle (with a brief test drive) to duplicate continued DTC P1326.
 No DTC P1326 observed. Service procedure is now complete, no other steps required.
 Continued DTC P1326 observed. Continue to next step for manual ECU update process.
TSB #: 24-EM-002H

Page 2 of 5
SUBJECT:

SUBJECT: CONTINUED DTC P1326 AFTER KSDS ENGINE MONITORING LOGIC ECU UPDATE

8. Prepare for ECU update.
 Capture ECU ROM ID of the vehicle (confirm with the ECU P/N label on module if needed).
 Refer to HTSS “Fix It Right” under symptom “General Information – Special Instructions”.
GDS Information:
Model

Event #

Description

Tucson 2.0L (TL)

1052

IMPROVED KSDS LOGIC APPLICATION FOR SPECIFIC ISSUE (ADDENDUM)

NOTE:
• Do not perform ECU update without completing the ENGINE MECHANICAL PRE-CHECK.
• This is a specific manual-only ECU update to be applied when deemed necessary with
Techline review after all mechanical inspections and appropriate repairs have been completed.
• Not all vehicles will require an ECU update for final repair.
ROM ID Information Table:
• Verify the ECM ROM ID before updating the software. Refer to the table below.
• IMMO (O) = Start Stop Button NON IMMO (X) = Key Start
VEHICLE

MY

2WD/4WD IMMO

16MY

2WD
4WD

X
X
O

2WD
X
17MY
O
4WD
X
2WD
18MY
4WD
2WD

Tucson
2.0L (TL)
19MY

4WD
2WD
2WD

20MY

4WD
2WD
4WD

21MY
2WD

O
X
O
X
O
X
O
X
O
X
O
X
O
X
O
X
O
X
O
X

ECU P/NO
39133-2ETA0
39133-2ETA2
39131-2ETA4
39131-2ETA6
39133-2ETA4
39133-2ETA6
39131-2ETA5
39131-2ETA7
39133-2ETA5
39133-2ETA7
39131-2ETA8
39133-2ETA8
39131-2ETA9
39133-2ETA9
39131-2ETF0
39133-2ETF0
39131-2ETF1
39133-2ETF1
39131-2ETF2
39133-2ETF2
39131-2E321
39131-2E322
39131-2E323
39131-2E324
39131-2E325
39131-2E326
39131-2E903
39131-2E904
39131-2E905
39131-2E906

TSB #: 24-EM-002H

ECU ROM ID
OLD

NEW

GGTL-FNUAPK02C00
GGTL-FNUAPK03D00

GGTL-FNUAPK03C00
GGTL-FNUAPK04D00

GGTL-GNUAQK01C00 GGTL-GNUAQK02C00
GGTL-GNUAPK01C00

GGTL-GNUAPK02C00

GGTL-GNUAQK01D00 GGTL-GNUAQK02D00
GGTL-GNUAPK01D00

GGTL-GNUAPK02D00

GGTL-HNUAQK01C00 GGTL-HNUAQK02C00
GGTL-HNUAPK01C00 GGTL-HNUAPK02C00
GGTL-HNUAQK01D00 GGTL-HNUAQK02D00
GGTL-HNUAPK01D00 GGTL-HNUAPK02D00
GGTL-INUAQK00C00 GGTL-INUAQK01C00
GGTL-INUAPK00C00
GGTL-INUAPK01C00
GGTL-INUAQK00D00 GGTL-INUAQK01D00
GGTL-INUAPK00D00
GGTL-INUAPK01D00
GGTL-INSAQK00C00 GGTL-INSAQK01C00
GGTL-INSAPK00C00
GGTL-INSAPK01C00
GTL-0NU0AQK00C00 GTL-0NU0AQK01C00
GTL-0NU0APK00C00 GTL-0NU0APK01C00
GTL-0NU0AQK00F00 GTL-0NU0AQK01F00
GTL-0NU0APK00F00
GTL-0NU0APK01F00
GTL-0NS0AQK00C00 GTL-0NS0AQK01C00
GTL-0NS0APK00C00
GTL-0NS0APK01C00
GTL-1NU0AQK01F00 GTL-1NU0AQK02F00
GTL-1NU0APK01F00
GTL-1NU0APK02F00
GTL-1NS0AQK01C00 GTL-1NS0AQK02C00
GTL-1NS0APK01C00
GTL-1NS0APK02C00

Page 3 of 5
SUBJECT:

SUBJECT: CONTINUED DTC P1326 AFTER KSDS ENGINE MONITORING LOGIC ECU UPDATE

NOTICE
GDS Vehicle Battery Low Voltage Warning:
If voltage is below 12 volts as per the below GDS warning, then select Back and attach a battery
charger to ensure an adequate battery state of charge for reliable update results. Turn ignition
back on, and then retry the ECU update again.

9.

Techline will review and approve the ECU
Update with a manual update PASSWORD.
 Perform the ECU Update in Manual Mode
with the provided PASSWORD for the
appropriate NEW ECU ECU ROM ID.

i

Information

Refer to TSB 15-GI-001 for additional
tablet-based Mobile GDS ECU update
information.

TSB #: 24-EM-002H

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SUBJECT:

SUBJECT: CONTINUED DTC P1326 AFTER KSDS ENGINE MONITORING LOGIC ECU UPDATE

10.

STUI
Take a screenshot of the ECU Update
Complete screen using your particular
tablet’s screenshot save method and
upload to STUI.

***** Existing ROM *****
***** Updated ROM *****

11. After the ECU Upgrade process shows 100% complete, cycle the ignition key to OFF for at least
30 seconds to reset the control unit.
12. Perform an All Systems Fault Code search and erase the history of the DTC that may have
incidentally occurred from the ECU update
Warranty Information (w/ ECU Update):
Model

Op. Code

Operation

Op.
Time

Casual Part

Tucson 2.0L
DTC Inspection + ECU
10D021RE
0.4 M/H 39133-2ETA6
(TL)
Update
NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.

Nature
Code

Cause
Code

I11

ZZ3

NOTE 2: If a part is found in need of replacement while performing this recall and the affected part is
still under warranty, submit a separate claim using the same repair order. If the affected part is out of
warranty, submit a Prior Approval request for goodwill consideration prior to performing the work.
NOTE 3: Op times include VIN, Mileage, and photo capture of the “ECU update complete” screen as
outlined in the Digital Documentation Policy.

TSB #: 24-EM-002H

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SUBJECT: