GROUP
ENG

MODEL
2017-19MY
Niro (DE P/HEV)

NUMBER
212 (Rev 1, 07/22/2020)

DATE
June 2020

TECHNICAL SERVICE BULLETIN
SUBJECT:

CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE

 NOTICE
This bulletin has been revised to include additional information. New/revised
sections of this bulletin are indicated by a black bar in the margin area.
This bulletin provides the procedure to replace the engine cylinder head on some 20172019MY Niro (DE HEV/PHEV) vehicles produced from January 1, 2016 through November 13,
2018 These vehicles may exhibit a MIL with misfire DTC’s and/or experience a slight engine
hesitation at the speeds between 24 - 37 MPH due to Exhaust Gas Recirculation (EGR)
operation. Follow the inspection instructions to check the production date range of the vehicle
and the cylinder head before replacing the cylinder head as outlined in this bulletin.
DTC Codes: P0300 (Random / Multiple Cylinder Misfire Detected),
P0301 (Cylinder 1 - Misfire Detected), P0302 (Cylinder 2 - Misfire Detected)
P0303 (Cylinder 3 - Misfire Detected), P0304 (Cylinder 4 - Misfire Detected)

Note: The Cylinder Head part number provided
comes assembled with Valves, Springs and
Cylinder Head Bolts.

Printed TSB copy is for reference only; information may be updated at any time.
Always refer to KGIS for the latest information.
Circulate To:

X General Manager


X Service Advisors


X Technicians


X Service Manager


X Parts Manager


X Body Shop Manager 
X Fleet Repair


Page 2 of 7
SUBJECT:

CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE

Inspection Procedure:
CASE 1: If DTC(s) ARE present and vehicle experiences engine hesitation between 24 – 37
mph, proceed to replace the cylinder head if the production date of the vehicle and the cylinder
head matches the inspection dates outlined on page 2.
CASE 2: If DTC(s) ARE NOT present and vehicle experiences engine hesitation, then
disconnect the EGR valve. If the hesitation goes away, proceed to replace the cylinder head if
the production date of the vehicle and the cylinder head matches the inspection dates outlined
on page 2.


Verify the vehicle and cylinder head production dates below:
January 1, 2016 to November 7, 2018

Cylinder Head Date Codes→

Locate the cylinder head Lot Number shown below and verify the cylinder head was
produced within the production date listed in the table above.

① Production Day
② Production Month
③ Production Year

(Ex. Lot No.)
SH8K07XXXXX
(November 07, 2018)

 NOTICE
This repair ONLY applies if the existing cylinder head was produced on or before
November 7, 2018.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: ENG212 (Rev 1) Niro (DE P/HEV) June 2020

Page 3 of 7
SUBJECT:

CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE

Replacement Procedure:
1.

Replace the cylinder head by referring to
the “Engine Mechanical System →
Cylinder Head Assembly → Cylinder
Head → Repair procedures” in the
applicable Shop Manual chapter on
KGIS.

CAUTION
Damage to cylinder head may
occur if head bolts are not
removed in the recommended
order.

 IMPORTANT
Read and carefully follow the
cylinder
head
disassembly
instructions provided on KGIS.

Related procedures for removing the cylinder head:
A. Shut off the High Voltage circuit.
Refer to the “Hybrid Control System → High-Voltage Shut off Procedures” chapters
in the applicable Shop Manual on KGIS.
B. Remove the air cleaner assembly.
Refer to the “Engine Mechanical System → Intake and Exhaust System → Air
Cleaner → Repair procedures" chapters in the applicable Shop Manual on KGIS.
C. Remove the engine room under cover.
Refer to the “Engine Mechanical System → Engine and Transaxle Assembly →
Engine Room Under Cover → Repair procedures" chapters in the applicable Shop
Manual on KGIS.
D. Drain the engine coolant into a suitable clean container for reuse.
Refer to the “Engine Mechanical System → Cooling System → Coolant → Repair
procedures" chapters in the applicable Shop Manual on KGIS.
E. Drain the inverter coolant.
Refer to the “Hybrid Motor System → Hybrid Motor Cooling System → Coolant
(Inverter) → Repair procedures" chapters in the applicable Shop Manual on KGIS.
For further details, please refer to the Shop Manual on KGIS.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: ENG212 (Rev 1) Niro (DE P/HEV) June 2020

Page 4 of 7
SUBJECT:

2.

CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE

Remove the existing studs from the
removed cylinder head and install them
on to the new cylinder head.

 NOTICE
Head gaskets and gasket seals
should
never
be
reused.
Replace with new gaskets/seals.

3.

Install the new cylinder head and related
parts in the reverse order of removal.

 IMPORTANT
Read and carefully follow the
cylinder
head
installation
instructions provided on KGIS.

 NOTICE
Ensure to use the new supplied
cylinder head mounting bolts
and install new injector o-rings
and seals on page 7.

CAUTION
Damage to cylinder head may
occur if head bolts are not
torqued in the recommended
order shown.
Torque Specifications for cylinder
head bolts:
9.4 - 12.3 lb.ft (12.7 - 16.7 N.m,
1.3 - 17 kgf.m) + [120 - 125°] + [120 125°]

 IMPORTANT
Follow the outline on page 5 to
replace the high-pressure fuel
pipe assembly.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: ENG212 (Rev 1) Niro (DE P/HEV) June 2020

Page 5 of 7

CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE

SUBJECT:

4.

Replace the high-pressure fuel pipe
assembly with a new part.

CAUTION
Discard the removed highpressure fuel pipe assembly,
DO NOT reuse.


When installing the new high
pressure fuel pipe assembly,
tentatively tighten the flange nuts
① and ③ by hand and ensure
that the fuel pipe does not bend or
twist. DO NOT tighten.



Tighten the fuel pipe securing
bracket ② as well as the vacuum
pump bracket to the torque
specifications.



Tighten the high-pressure fuel
pipe flange nuts ① and ③ to the
torque specifications.



Tighten the bolt flange ④ to the
torque specifications.

Item No.
1

19.5 - 23.9 lb-ft (26.5 - 32.4 Nm,
2.7 - 3.3 kgf.m)

2

5.8 - 8.7 lb-ft (7.8 - 11.8 N.m,
0.8 - 1.2 kgf.m)

3

19.5 - 23.9 lb-ft (26.5 - 32.4 Nm,
2.7 - 3.3 kgf.m)

4

9.4 - 10.8 lb-ft (12.7 - 14.7 N.m,
1.3 - 15 kgf.m)

 IMPORTANT
Use the SST 09314-3Q100 when
tightening the flange nuts to the
torque specifications. DO NOT
use a general purpose tool.

Torque Specifications

CAUTION
Confirm that no fuel is leaking
from the high pressure fuel pipe
assembly connections after the
engine is running.
5.

Using KDS, clear DTC(s) and verify
vehicle operates normally.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: ENG212 (Rev 1) Niro (DE P/HEV) June 2020

Page 6 of 7

CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE

SUBJECT:

AFFECTED VEHICLE RANGE:
Model

Production Date Range

Niro (DE P/HEV)

January 1, 2016 to November 13, 2018

REQUIRED TOOL:
Tool Name

Figure

Comments

Torque Wrench

Locally Sourced

Torque Wrench Socket

P/N SST 09314 3Q100

REQUIRED PART:
Part Name

Part Number

Figure

Part Description

Qty.

Cylinder Head Complete

Cylinder Head Gasket

Cylinder Head
Cover Gasket

Exhaust Manifold Gasket
Cylinder Head Kit

ENG21200000FF

1
Intake Manifold Gasket

Fuel Tube Assembly

ETC Gasket

EGR Gasket

*Oil Plug Gasket and Oil Filter, refer to EPC.
Required Parts continued on page 7.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: ENG212 (Rev 1) Niro (DE P/HEV) June 2020

Page 7 of 7
SUBJECT:

CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE

REQUIRED PART: (Continued)
Part Name

Part Number

Combustion
Seal Ring Kit (A)

Figure

D
D
C

Washer-Injector
Bracket Kit (B)

Qty.

C
D
C
4

Support Disc Kit (C)

B
ENG21 200000FF

A

O-ring Kit (D)

High Pressure
Fuel Pump Bolts

2
N/A

Fuel Rail Bolts

4

Note: The Fuel Injector is NOT included in the kit. Image is for reference use only.
*Oil Plug Gasket and Oil Filter, refer to EPC.
WARRANTY INFORMATION:
N Code: E51 C Code: ZZ5
Note:
Claim
Type

Causal P/N

Qty.

Repair
Description

Labor Op
Code

Op
Time

Replacement
P/N

Qty.

W

22100 03HA0

0

Cylinder Head
Replacement and
Clearing DTC(s)

22111F01

7.7
M/H

ENG21 200000FF

1

Note: Use recommended Engine Oil in accordance owner’s manual service specifications.
Refer to WCPM section 2.15 Genuine Kia Fluids & NPN Part numbers.
* Coolant/Antifreeze use UM040 CH012
* Liquid Sealant TB1217H use NPNSEALANT
* Loctite 5900H use NPNOTHER
When substitute transportation is necessary, follow service policy and warranty claims
processing manual guidelines.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: ENG212 (Rev 1) Niro (DE P/HEV) June 2020