GROUP

NUMBER

FUEL SYSTEM

Technical Service Bulletin
SUBJECT:

24-FL-006H

DATE

MODEL(S)

OCTOBER 2024

SEE BELOW

T-GDI INJECTOR REPLACEMENT DUE TO MISFIRE DTC(S)

Description: Certain vehicles equipped with a 2.0L T-GDI Theta II engine may exhibit one or more
misfire DTCs due to the injectors leaking internally. This may be caused by internal filter breakage in
the injector. Follow the procedure in this TSB to replace all 4 injectors on affected vehicles, using the
kit in the Parts Information section.
Possible misfire DTCs: P0300, P0301, P0302, P0303, P0304

Applicable Vehicles with 2.0L T-GDI engines:
• 2022MY Elantra N (CN7 N) produced from 09/15/2021 – 07/01/2022 (VIN starts with KMH)
• 2022MY Kona N (OS N) produced from 10/05/2021 – 06/16/2022
• 2021-2022MY Veloster N (JS N) produced from 01/05/2021 – 07/15/2022

Parts Information:
Part Name

Part Number

Fuel Injector Kit
(contents below)

35399-2G033QQH

1. Fuel Injector – GDI

35310-2GHB0

2. Clip – Fuel Injector

35309-04AA0

3. Pipe – High Pressure

35305-2GPD0

4. Gasket – Intake Manifold

28411-2GTB0

5. Gasket – Throttle Body

28312-2E000

Figure

1

Remarks
High Pressure
Pump

4

Use 1 Kit
per vehicle
Qty: 4

2
3

Qty: 4
Qty: 1

Fuel Rail
5

Qty: 1
Qty: 1

NOTE: Kits received may contain two additional intake manifold gaskets and a throttle body gasket
(#5) which is NOT needed for this TSB. These may be discarded as they are NOT to be used for this
repair.

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

T-GDI INJECTOR REPLACEMENT DUE TO MISFIRE DTC(S)

SUBJECT:

SST Information:
Tool Name

Tool #

Torque
Wrench
Socket

09314-3Q100

Figure

Remarks

For tightening the flare nuts on both
ends of the high pressure fuel pipe.
NOTE 1: All dealers previously received this tool as part of the dealer's essential tool kit.
NOTE 2: Additional SST tools can be ordered through Snap-on at [email protected] or
hyundaiessentialtools.com.
NOTE 3: If further assistance is required, please contact [email protected].

Warranty Information:
Model

Op. Code

Elantra N (CN7 N)

40D108R0

Kona N (OS N)

40D108R1

Veloster N (JS N)

40D108R2

Operation

Op.
Time

Causal Part

Nature
Code

Cause
Code

35310-2GHB0

W17

ZZ5

1.6
M/H
GDI Fuel Injector
Replacement
(ALL 4)

1.7
M/H
1.8
M/H

NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: Take a picture as instructed on page 7. Op times include VIN, Mileage, and Repair
validation photo(s) as outlined in the Digital Documentation Policy.
NOTE 3: The incident parts are subject to callback through the normal Warranty Technical Center
(WTC) parts return process. Claim is subject to debit if the part is not returned.
NOTE 4: If a part is found in need of replacement while performing this TSB 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.

TSB #: 24-FL-006H

Page 2 of 7
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T-GDI INJECTOR REPLACEMENT DUE TO MISFIRE DTC(S)

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Service Procedure:

STUI
This TSB includes Repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.

Service Procedure Flowchart:

Vehicle In

Check for DTCs

Misfire DTC(s)?
(P0300, P0301,
P0302, P0303,
P0304)

No
(other DTC)

Yes

TSB does NOT apply.
Repair vehicle per
shop manual.
(warranty repair)

No

Is VIN in model's
affected
production date
range on page 1?

Yes

Injector Replacement

Vehicle Out

TSB #: 24-FL-006H

Page 3 of 7
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SUBJECT:

T-GDI INJECTOR REPLACEMENT DUE TO MISFIRE DTC(S)

DTC Inspection
Perform a Fault Code Search for one or more of the following misfire DTCs:
•

P0300, P0301, P0302, P0303, P0304

If one or more of these are found, and vehicle falls within the Applicable Vehicle range, proceed to
Injector Replacement.
If none of these DTCs are found, and/or vehicle is NOT within the Applicable Vehicle range, then this
TSB does NOT apply. Continue with normal diagnosis and repair.
Injector Replacement
1.

Record customer’s radio presets, if applicable,
then turn ignition OFF and disconnect the
negative (–) battery cable.
! CAUTION
To avoid injury from leakage of high
pressure fuel, do NOT remove the
following components right after engine is
turned OFF:
• High Pressure Fuel Pump
• High Pressure Fuel Pipe
• Delivery Pipe
• Injectors

2.

Release the Residual Pressure in the Fuel
Line.
Refer to the shop manual:
• OSN/CN7N: Engine Control / Fuel
System > Fuel Delivery System >
Release Residual Pressure in Fuel Line
• JSN: Engine Control / Fuel System >
Fuel Delivery System > Repair
procedures

TSB #: 24-FL-006H

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T-GDI INJECTOR REPLACEMENT DUE TO MISFIRE DTC(S)

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3.

Remove the delivery pipe and injector
assembly (A).
Refer to the shop manual:
• Engine Control / Fuel System > Fuel
Delivery System > Delivery Pipe >
Repair procedures

A

4.

Remove the connector (B) and clip, then
separate each injector from the delivery pipe.

B

5.

Disconnect the injectors and rail sensor
connectors (C).

6.

Remove the injectors from the fuel rail (D) after
releasing the clips (E) on both sides.

i

C

D

Information

Before installing new injectors be sure to
clean each cylinder head hole. Use a
brush to remove carbon deposits and
foreign materials.

E
E

TSB #: 24-FL-006H

Page 5 of 7
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T-GDI INJECTOR REPLACEMENT DUE TO MISFIRE DTC(S)

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7.

Install the new injectors in the reverse order of
removal.
Fuel injector components:
• Combustion seal (F)
• Rubber washer (G)
• Support disk (H)
• O-ring (I)

i

I
H
F

Information
G

Refer to important installation instructions
below.

i

Information

When replacing the rubber washer, the
steel plate side (J) should be facing the
cylinder installation and the rubber plate
slide (K) should be facing the injector
body as shown.

K

NOTICE
•
•

•
•
•
•
•
•

Do NOT reuse any of the injector
components.
Do NOT drop the new injector. If it is
dropped, inspect carefully before
installing as internal damage may
occur.
Do NOT apply oil, grease, or lubricant
to the combustion seal.
Apply engine oil to the new injector
O-ring.
When inserting the injector, be careful
NOT to damage the injector tip.
Be careful NOT to deform the new
high pressure fuel pipe.
Use SST 09314-3Q100 for installing
the high pressure fuel pipe flange nut.
Do NOT tilt the torque wrench when
tightening nuts.

TSB #: 24-FL-006H

J

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T-GDI INJECTOR REPLACEMENT DUE TO MISFIRE DTC(S)

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8.

STUI
Using STUI, take a photo of the new
injectors installed onto the delivery
pipe and connectors seated with the
last 6 digits of the VIN and the date of
repair on a piece of paper.
Upload the photo to STUI.

NOTICE
When tightening the delivery pipe
installation bolts, tighten them by hand
first, then torque to proper specification in
the order shown at right.

9.

3
1
2

4

Reinstall all remaining parts in reverse order of
removal.

NOTICE
Carefully observe all torque specifications
in the Shop Manual.

10.

Reset customer’s radio presets, if applicable,
and reconnect the negative (–) battery cable.

11.

Start the engine and confirm proper operation
of the vehicle.

TSB #: 24-FL-006H

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