GROUP
HYBRID
CONTROL
DATE

Technical Service Bulletin
SUBJECT:

SEPTEMBER,
2017

NUMBER
17-HC-001
MODEL
SONATA HYBRID
(YF HEV)

OIL LEAK AT ELECTRIC OIL PUMP

This TSB supersedes 11-AT-019 to update the Parts Information and Service Procedure.
Description: Some Sonata Hybrid (YF HEV) vehicles may experience a small oil leak from the
electric oil pump (EOP) seals. If so, follow the Service Procedure in this bulletin to inspect and repair
the oil seals between the transmission and EOP.
No drivability issues are associated with this condition.

Applicable Vehicles: 2011~15 Sonata Hybrid (YF HEV) 2.4L

A: Location of the EOP (A)

B: Drops of ATF (B) on the bottom of transmission

Circulate To: Service Manager, Warranty Manager, Service Advisors, Technicians, Fleet Repair

OIL LEAK AT ELECTRIC OIL PUMP

SUBJECT:

PARTS INFORMATION:
MODEL

PART NAME

2011~15 Sonata
Hybrid (YF HEV)

PART NUMBER

Oil Seal

45261-3D000

Oil Seal

45262-3B100

O-ring

46131-3D000

Bolt

45227-3D000

LOCATION

NOTE: If the new bolt is not available, apply RTV Silicon Gray, P/N 00232-19061 sealant,
or equivalent, to the bolt threads and reuse the bolt.
WARRANTY INFORMATION:
MODEL

OP CODE

OPERATION

OP TIME

CAUSAL
PART

NATURE
CODE

CAUSE
CODE

2011~15
Sonata Hybrid
(YF HEV)

46120R00

Electric oil
pump

Refer to
WEBLTS for
LTS time

See Parts
Information

B25

ZZ2

TSB #: 17-HC-001

Page 2 of 6

OIL LEAK AT ELECTRIC OIL PUMP

SUBJECT:

SERVICE PROCEDURE
1.

Open the rear trunk and open the cover to the
safety plug.
Put on insulation gloves.
Pull up on the black tab and pull out the safety
plug.

WARNING
Failure to wear protective gear and
perform this procedure may result in
accidental injury or death.
2.

Without depressing the brake pedal, push the Start-Stop button 2 times to power the cluster.
Attach a GDS and select Data Analysis, BMS menu Inverter Capacitor Voltage. Confirm the
Inverter Capacitor Voltage is less than 30V.
 If less than 30V, the system voltage is safe for the technician. Go to Step 3.
 If more than 30V, wait until the voltage is within specification. Go to Step 3.

3.

Squeeze the tab and disconnect the connector
above the oil pump.

TSB #: 17-HC-001

Page 3 of 6

SUBJECT:

4.

OIL LEAK AT ELECTRIC OIL PUMP

Use a screwdriver to push the gray tab to the left and remove the connector.

5. Squeeze the tab and remove the connector for
the fluid pressure switch.

6.

Remove 3 bolts and one nut. Remove the
EOP.

TSB #: 17-HC-001

Page 4 of 6

OIL LEAK AT ELECTRIC OIL PUMP

SUBJECT:

7.

Remove the two oil seals.
Clean the bores where the oil seals are
located.
Install new oil seals.

8.

Install a new O-ring on the EOP.

9.

Reinstall the EOP.
Install a new bolt, P/N 45227-3D000, in the
location shown by the arrow.
Reinstall two bolts and one nut.
Tighten the bolts and nut to specification.
Torque: 18~22 lb-ft (25~30 Nm)

NOTICE
If the new bolt is not available, apply
RTV Silicon Gray, P/N 00232-19061,
or equivalent, to the bolt threads.

TSB #: 17-HC-001

Page 5 of 6

SUBJECT:

OIL LEAK AT ELECTRIC OIL PUMP

10. Reconnect the connectors to the EOP and the fluid pressure switch.
Reconnect the safety plug.
11. Remove the transaxle fill plug.
Use a fluid pump to add SP4-M ATF through
the fill plug opening. Reinstall the fill plug.
Attach the GDS and select Data Analysis and
Oil Temperature Sensor.
Start the engine and shift to Park. When the
ATF is 122°F~140°F (50~60°C), remove the
level checking plug. The level is correct when
oil flows out of the level checking plug in a thin
steady stream.
Collect and dispose of any excess fluid in
accordance with local regulations.
12. Depress the brake pedal and press the SSB to enable EV Ready.
Check for leaks from the oil pump.
Reinstall the splash shield under the transmission.
Attach a GDS and select Data Analysis, A/T menu and Oil Pump Speed Actual RPM. In “EV
Ready” mode, confirm the Oil Pump Speed Actual RPM is above 400 rpm when the engine is
off.
13. Drive the vehicle and confirm the proper operation of the oil pump.

TSB #: 17-HC-001

Page 6 of 6