GROUP

NUMBER

CAMPAIGN

Technical Service Bulletin
SUBJECT:

DATE

21-01-024H
MODEL(S)

MARCH 2021

APPLICABLE
VEHICLES BELOW

DTC P1326 - ENGINE INSPECTION / REPLACEMENT
(SERVICE CAMPAIGN T6G)

Description: Certain vehicles listed below may experience the Check Engine warning lamp
illuminated with DTC P1326. Follow the procedure to inspect the vehicle and replace the engine
and/or update the engine ECU software (if new ROM is available) based on the inspection results.
Applicable Vehicles:
Certain 2016 MY Sonata HEV (LFE) vehicles with Nu 2.0L GDI Hybrid engines
Certain 2012-2017 MY Veloster (FS) vehicles with Gamma 1.6L GDI engines
SST Information:
Part Name

Part Number / Figure

Note

Torque Wrench Socket

09314-3Q100-01

Injector Combustion Seal
Ring Installer

09353-2B000

For GDI engine only: Required if
engine replacement is required. Refer
to TSB 19-FL-001H for the detailed
usage instructions.
Order replacements through Bosch at
1-866-539-4248.
Required to drain oil if necessary.

5 Quart Container

ULINE S-22984
17 mm 12-Point Metric Flank
Drive® Reversible Ratcheting
Box/ Speed Open-End
Combination Wrench

(Snap-on) SRXRM17

Order from ULINE at 800-295-5510 or
ULINE.com. An alternative container
can be used but it must have clear
markings to indicate fluid levels in
quarts (1-4 quarts) for PA Approval
purposes.
Optional tool: For unfastening torque
converter bolts to separate
engine/trans between bellhousing if
engine cannot rotate.

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

SUBJECT:

DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

SST Information (cont.)
Part Name

Part Number / Figure

Note
Confirm the following pressures
meet requirements. The correct
ranges for AP/VC air pressures
are also indicated with red/blue
decals on the gauges:
Shop air supply:
50 psi minimum
AP: 0.1 ~ 0.11MPa
VC: -73 ~ -83Kpa
(Refer to TSB 20-GI-009H or
later for calibration procedure)

1
2

3
(1) TEST HOSE (2) MAIN HOSE
(3) POWER SUPPLY CABLE

BEARING
CLEARANCE
TESTER SET
(BEARING TOOL)

One BEARING CLEARANCE
TESTER SET provided to dealers.
(Additional units can be ordered.)

KQ231-2T110QQH
KQ231-2T100QQH
KQ231-2T101QQH

For Bearing Clearance Tester
software related issues, contact
GITA at: 888-437-0308
For Bearing Clearance Tester
hardware related issues, contact
Techline at: 800-325-6604
BEARING CLEARANCE
TESTER SET (BEARING TOOL)
(includes A - F)
(A) BODY
(B) SPARK PLUG ROD
(M12 for GD and Theta II MPI
Hybrid engines)

 Upper body portion is
smooth with no grooves.
KQ231-2T107QQH

(B) SPARK PLUG ROD
(M14 for MPI engines)

 2 machined identification
grooves on upper body.
KQ231-2T102QQH
KQ231-2T103QQH
KQ231-2T104QQH
KQ231-2T105QQH

TSB #: 21-01-024H

(C) CRANK ROTATOR TOOL
(D) CLEARANCE GAUGE
(E) POWER SUPPLY CABLE
(F) TEST HOSE (AIR HOSE FOR
CLEARANCE GAUGE)

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SUBJECT:

DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

Parts Information:
NOTE: Use the Service Process Results Worksheet in the following page as a guide to determine
the appropriate Part Number(s).
1. Order the required parts based on the vehicle inspection results outlined in the Service Procedure
Flowchart. (Use the Service Process Results Worksheet in the following page as a guide to
determine the appropriate part numbers.)
2. Refer to TSB # 21-01-025H (or latest revision) for parts information
3. Consult the Hyundai Warranty Policy & Procedures to determine New or Reman Engine Usage.
Please note that there may not be a Reman available.
Warranty Information:
NOTE: Use the Service Process Results Worksheet in the following page as a guide to determine
the appropriate Op Code.
1. Refer to TSB # 21-01-025H (or latest revision) for OP Codes
2. The KSDS Engine ECM Update is only required if new software is available. In this case, submit a
separate campaign claim under Service Campaign 966 for the ECM update (in addition to
submitting applicable op code from Service Campaign T6G (TSB # 21-01-025H or latest revision)).
3. Campaign T6G OP codes for engine replacement should only be used if engine replacement is
deemed necessary by the service procedure in this TSB.
 Refer to Prior Approval Submission Documentation at last page for checklist of PA items.
 General engine replacement for conditions outside of those contained in this TSB may not be
covered by warranty
Engine Oil Maintenance Information

Poor oil maintenance reduces the engine oil
lubrication and cooling capacities. As a result,
internal engine parts can be damaged resulting
in abnormal wear to internal engine parts,
excessive carbon deposits, sludge, and other
various conditions. An inspection for these
conditions and others may be required prior to
engine approval.

Piston Ring Deposits

NOTICE
Engine oil is used to lubricate, cool, and
operate various engine parts. Engine oil
changes and engine oil level checks are
required on a regular basis for all engines.

Oil Sludge

Engine oil level checks and top-ups are
recommended if they are needed prior to
the end of an oil change interval.

Excessive Wear

TSB #: 21-01-024H

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DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

Service Process Results Worksheet: (Print copies of the form below in this page for multiple uses.)

TSB #: 21-01-024H

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DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

Service Procedure Flowchart:

TSB #: 21-01-024H

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DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

TSB #: 21-01-024H

Page 6 of 19
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DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

TSB #: 21-01-024H

Page 7 of 19
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SUBJECT:

DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

Service Procedure:
Initial Inspection:
1. Scan for DTC P1326 using the GDS.
 If DTC P1326 (or any other code) is present, take screenshot of Freeze Frame data for PA
using GDS screen capture if any DTCs are present and proceed to Step 2.
2. Check for any sludge under the engine oil filler cap.
 Using STUI on the GDS, take and submit a picture of the oil cap underside with the VIN in
the background of the photo (RO or last 6 digits written on paper). VIN must be legible.
 Sludge under oil cap: Submit Warranty Prior Approval (PA).
 No sludge under oil cap: Continue to next step.
3. Check for any engine oil on the engine oil dipstick.
 Using STUI on the GDS, take and submit a picture of the dipstick with the VIN in the
background of the photo (RO or last 6 digits written on paper). VIN must be legible.
 No engine oil on dipstick: Submit Warranty Prior Approval (PA)
 Engine oil on the dipstick: Continue to Engine Rotation Check.

Engine Rotation Check:
1. Rotate the crankshaft with the crank rotator SST.
NOTICE
 If the crankshaft cannot be turned with a moderate
force, then measure the force required to turn the
If other engine accessory
crankshaft with a torque wrench.
components are seized, remove the
 If the SST or shop tools do not fit the specific
engine accessory belt prior to
completing the engine rotation
vehicle type, remove the front passenger wheel
check.
and wheel liner or underbody tray as needed to
rotate the crankshaft.
 If the crankshaft rotates normally:
o Proceed to Bearing Inspection and follow the procedure sequence in Flow Chart A.
 If the force required for rotating the crankshaft is greater than 94 lb-ft., documentation
through STUI video is required.
o Follow the procedure sequence in Flow Chart B and note the following differences.
 If there is NO lower end damage:
o Follow the Oil Drain Procedure in the following page.
 If there is external lower end damage:
o Using STUI in the GDS, submit a picture of the damage with the VIN in the
background of the photo (RO or last 6 digits written on paper). VIN must be
legible.
o Follow the Oil Drain Procedure in the following page.

TSB #: 21-01-024H

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DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

NOTICE
PA Approval is required for engine replacement. Submit PA and refer to the Dealer Best
Practices guide for the latest requirements for engine approval.
1) If engine does not rotate normally, a STUI video including the following is required:
 VIN Plate (at windshield or on door jamb)
 Attempt to rotate the crankshaft
2) Save the crankshaft rotation torque value
3) A picture of the lower end damage is required if present
Additional documentation may be required:
 Refer to Prior Approval Submission Documentation at last page for PA required items.
 Use STUI feature on the GDS to take and submit pictures and videos.
Oil Drain Procedure:
1. Remove the engine oil filler cap (A) and
engine oil level gauge (B).

A
B

2. Lift up the vehicle and remove the oil drain
plug (C).

C
3. Drain the engine oil into a container.
The 1-4 quart level should be clearly marked
and visible on the container. Using STUI in the
GDS, take and submit a picture of the oil
container with the drained oil level clearly
visible and the VIN in the background of the
photo (RO or last 6 digits written on paper) for
records, if needed. VIN must be legible.

1 to 4
Quart
Level
Visible

4. Submit PA for engine replacement approval.

TSB #: 21-01-024H

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DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

Bearing Inspection:
1. Connect the main hose (shop air supply) and
test hose to the bearing tool (with other end of
the test hose disconnected). (The power to the
bearing tool main unit is not necessary at this
time.)
Confirm the shop air pressure and AP/VC
pressures on the bearing tool meet
requirements. The correct ranges for AP/VC air
pressures are also indicated with red/blue
decals on the gauges. Using STUI in the GDS,
take and submit a picture of the gauges with
the pressure levels clearly visible and the VIN
in the background of the photo (RO or last 6
digits written on paper) for records.
Shop air supply: 50 psi minimum
AP/VC air pressure calibration check:
a) Connect the main air compressor hose.
b) Connect the test hose. (The other end of the
test hose should be left disconnected from
the spark plug rod.)
c) Confirm that the AP/VC toggle switch at top
is in the middle position.
d) Inspect the AP/C gauge indicators and
compare to the specification range:
 AP: 0.1 ~ 0.11MPa
 VC: -73 ~ -83Kpa

NOTICE
Do not continue if any of the above readings are out of specification range.
 Adjust shop air to consistently provide at least 50 PSI of air pressure or greater.
 Do not use a portable air compressor to perform the bearing clearance testing.
 Be sure to check that the shop air water separator is functioning correctly.
 If any of the AP/VC air pressure indications are out of the specified range,
recalibration of the Bearing Clearance Tester is required.
o Refer to latest instructions outlined in the Engine Bearing Clearance Tester
Calibration Procedure TSB 20-GI-009H or later for calibration procedure.

NOTICE
For Bearing Clearance Tester software related issues, contact GITA at: 888-437-0308
For Bearing Clearance Tester hardware related issues, contact Techline at: 800-325-6604
TSB #: 21-01-024H

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DTC P1326 – ENGINE INSPECTION / REPLACEMENT (SERVICE CAMPAIGN T6G)

2. Remove the engine cover and the 4 ignition
coils.
Tightening Torque (ignition coils):
9.8 - 11.8 Nꞏm
(1.0 - 1.2 kgfꞏm, 7.2 - 8.7 Ibꞏft)