19-FL-004H

GROUP
NUMBER
FUEL SYSTEM
Technical Service Bulletin
DATE
19-FL-004H
MODEL(S)
JULY 2019
Tucson (TL) 2.0L
ECM UPDATE FOR TL 2.0L DTC P0128
SUBJECT:
Description:
This bulletin provides information related to the Engine Control Module (ECM) software logic update
for the DTC P0128 – “Coolant thermostat - coolant temp below thermostat regulating temperature”.
Applicable Vehicle:
 2018 Tucson (TL) with 2.0L GDI engine.
GDS Information:
System Selection: Engine (ECM)
Event #
Description
537
TL 2.0GDI - P0128 DTC IMPROVEMENT
Warranty Information:
Model
Op Code
Operation
Op Time
Causal
Part
Nature
Code
Causal
Code
Tucson (TL)
39131F05
BMS UPGRADE
0.3 M/H
39131-2ETA8
I3T
ZZ3
ROM ID Table:
NOTICE
You must initially perform the GDS ECU Update in Auto Mode.
 If the ECU Update starts but then fails in Auto Mode, perform the update in Manual Mode to
recover.
Circulate To: Service Manager, Warranty Manager, Service Advisors, Technicians, Fleet Repair
SUBJECT:
:
!
ECM UPDATE FOR TL 2.0L DTC P0128
WARNING
GDS Vehicle Battery Voltage Warning:
If voltage is below 12 volts as per the below GDS warning, then select Back and
operate the vehicle in Ready mode for at least 20 minutes to ensure an adequate
battery state of charge for reliable update results. Turn ignition back on, and then retry
the ECU update again.
Service Procedure:
1. Perform GDS software update:


Refer to TSB 15-GI-001 for the detailed tablet-based Mobile GDS ECU update
procedures.
Refer to TSB 15-GI-002 for the detailed PC-based GDS ECU update
procedures.
2. Check for Diagnostic Trouble Codes in the ALL menus and erase any DTC.
3. Erase the DTC in the BlueLink system according to TSB 12-BE-005-2.
4. Confirm normal vehicle operation.
Manual Mode Password:
TSB #: 19-FL-004H
Page 2 of 2
SUBJECT: