NHTSA ID Number: 11003637
Manufacturer Communication Number: L-SB-0007-21 Rev1
TSB/Document Date: 2024-07-06
Summary
Some 2015 – 2017 model year NX 200t, 2016 – 2017 model year GS 200t, IS 200t, and RC 200t, 2018 – 2019 model year GS 300, and 2018 – 2021 model year NX 300, and 2018 – 2024 model year IS 300 and RC 300 vehicles equipped with an 8AR-FTS engine may exhibit a MIL ON condition with one or more of the following Diagnotic Trouble Codes (DTCs): •Cylinder Misfire – P030000, P030027, P030085, P030100, P030200, P030300, P030400. •Air-Fuel Ratio Imbalance – P11EA00, P11EC00, P11ED00, P11EE00, P11EF00, P219A00, P219C00, P219D00, P219E00, P219F00. Some vehicles may also enter limp mode, and the Multi-Informational Display (MID) will display the following message: “reduced engine power – take vehicle to nearest dealer.” This may be caused by cylinder compression pressure drop due to improper exhaust valve sealing from worn valve guides. REVISION NOTICE April 17, 2024 Rev1: •Applicability has been updated to include 2021 – 2024 model year IS 300 and RC 300, and 2021 NX 300 vehicles. •The Introduction, Parts Information, and Repair Procedure sections have been updated.
L-SB-0007-21
Rev1
March 30, 2021
MIL ON With Air-Fuel Ratio Imbalance and/or Cylinder
Misfire DTCs
Service
Category
Engine/Hybrid System
Section
Engine Mechanical
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2016 - 2017
GS200T, IS200T, RC200T
VDS(s): BA1BL, BA1D2, HA5BC
2018 - 2019
GS300
VDS(s): BA1BL
2018 - 2024
IS300, RC300
VDS(s): AA1D2, AA5BC, BA1D2, CA1D2,
DA1D2, DA5BC, GA1D2, GA5BC, HA5BC
2015 - 2017
NX200T
VDS(s): BARBZ, YARBZ
2018 - 2021
NX300
VDS(s): AARBZ, AARDZ, BARBZ, DARBZ,
DARDZ, GARBZ, HARBZ, JARDZ, SARBZ,
SARDZ, YARBZ
REVISION NOTICE
April 17, 2024 Rev1:
Applicability has been updated to include 2021 – 2024 model year IS 300 and RC 300, and
2021 NX 300 vehicles.
The Introduction, Parts Information, and Repair Procedure sections have been updated.
Any previous printed versions of this bulletin should be discarded.
© 2024 Lexus
, a division of Toyota Motor Sales, USA
Page 1 of 7
L-SB-0007-21
Rev1
March 30, 2021
Page 2 of 7
MIL ON With Air-Fuel Ratio Imbalance and/or Cylinder Misfire DTCs
Introduction
Some 2015 – 2017 model year NX 200t, 2016 – 2017 model year GS 200t, IS 200t, and RC 200t,
2018 – 2019 model year GS 300, and 2018 – 2021 model year NX 300, and 2018 – 2024 model
year IS 300 and RC 300 vehicles equipped with an 8AR-FTS engine may exhibit a MIL ON
condition with one or more of the following Diagnostic Trouble Codes (DTCs):
Cylinder Misfire – P030000, P030027, P030085, P030100, P030200, P030300, P030400.
Air-Fuel Ratio Imbalance – P11EA00, P11EC00, P11ED00, P11EE00, P11EF00,
P219A00, P219C00, P219D00, P219E00, P219F00.
Some vehicles may also enter limp mode, and the Multi-Informational Display (MID) will display
the following message: “reduced engine power – take vehicle to nearest dealer.” This may be
caused by cylinder compression pressure drop due to improper exhaust valve sealing from worn
valve guides. Follow the Repair Procedure in this bulletin to address this condition.
Production Change Information
This bulletin applies to engines produced BEFORE the Engine Serial Numbers shown below.
MODEL
PLANT
NX 200t, NX 300
TMK
DRIVETRAIN
EFFECTIVE ENGINE SERIAL NUMBER
4286682
NX 200t, NX 300
IS 200t, IS 300,
GS 200t, GS 300,
RC 200t, RC 300
All
Yamaha
© 2024 Lexus, a division of Toyota Motor Sales, USA
Z343433
L-SB-0007-21
Rev1
March 30, 2021
Page 3 of 7
MIL ON With Air-Fuel Ratio Imbalance and/or Cylinder Misfire DTCs
Warranty Information
OP CODE
DESCRIPTION
MODEL
VDS
TIME
BA1BL
22.9
OFP
T1
T2
11101-##### *
8A
43
GS 200t
GS 300
EG2402
R & R Cylinder Head
and Valves
IS 200t
BA1D2
IS 300
AA1D2
BA1D2
DA1D2
GA1D2
RC 200t
HA5BC
RC 300
AA5BC
DA5BC
GA5BC
HA5BC
NX 200t
BARBZ
NX 300
AARDZ
BARBZ
DARDZ
JARDZ
SARDZ
NX 200t
YARBZ
NX 300
AARBZ
DARBZ
GARBZ
HARBZ
SARBZ
YARBZ
22.5
22
*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching for the parts in the Electronic Parts Catalog using the VIN filter.
APPLICABLE WARRANTY
This repair is covered under the Lexus Powertrain Warranty. This warranty is in effect for
72 months or 70,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to occurrence of the specified condition described in
this bulletin.
© 2024 Lexus, a division of Toyota Motor Sales, USA
L-SB-0007-21
Rev1
March 30, 2021
Page 4 of 7
MIL ON With Air-Fuel Ratio Imbalance and/or Cylinder Misfire DTCs
Parts Information
PART NUMBER
MODEL
PART NAME
QTY
Head Sub-assy, Cylinder
1
Gasket, Cylinder Head
1
Head Sub-assy, Cylinder
1
11115-36070
Gasket, Cylinder Head
1
13715-36041
Valve, Exhaust
8
90913-02131
8
90913-02126
8
11213-36050
Gasket, Cylinder Head Cover
1
PREVIOUS
NEW
11101-39845
11101-39846
11101-80020
NX 200t,
NX 300
11101-39847
11101-39848
11115-36061
11101-39885
IS 200t,
IS 300,
GS 200t,
GS 300,
RC 200t,
RC 300
11101-39886
11101-80019
11101-39887
All
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
Techstream ADVI*
PART NUMBER
QTY
TSADVUNIT
Techstream 2.0
TS2UNIT
ADE
1
Techstream Lite
TSLITEPDLR01
Techstream Lite (Green Cable)
TSLP2DLR01
*Essential SST.
NOTE
Only ONE of the Techstream units listed above is required.
GTS+ software version 2024.01.002.02 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787 or by visiting TIS – Diagnostics – Tools & Equipment – Techstream Order Portal.
© 2024 Lexus, a division of Toyota Motor Sales, USA
L-SB-0007-21
Rev1
March 30, 2021
Page 5 of 7
MIL ON With Air-Fuel Ratio Imbalance and/or Cylinder Misfire DTCs
Repair Procedure
1. Using GTS+, check if ANY of the following DTCs are present:
Cylinder Misfire – P030000, P030027, P030085, P030100, P030200,
P030300, P030400.
Air-Fuel Ratio Imbalance – P11EA00, P11EC00, P11ED00, P11EE00, P11EF00,
P219A00, P219C00, P219D00, P219E00, P219F00.
Are ANY of the DTCs listed above present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Perform a cylinder leakage test.
Was ANY leakage found to be coming from the exhaust valves?
YES — Continue to step 3.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
3. Inspect the exhaust valve guides for wear.
Refer to TIS, applicable model and model year Repair Manual:
2015 – 2017 NX 200t:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
2018 – 2021 NX 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
2016 – 2017 IS 200t:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
2018 – 2024 IS 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
2016 – 2017 GS 200t:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
2018 – 2019 GS 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
2016 – 2017 RC 200t:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
2018 – 2024 RC 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head – Inspection
© 2024 Lexus, a division of Toyota Motor Sales, USA
L-SB-0007-21
Rev1
March 30, 2021
Page 6 of 7
MIL ON With Air-Fuel Ratio Imbalance and/or Cylinder Misfire DTCs
Repair Procedure (continued)
Is the valve guide wear within specified condition?
YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NO — Continue to step 4.
4. Replace the parts specified in the Parts Information table.
Refer to TIS, applicable model and model year Repair Manual:
2015 – 2017 NX 200t and 2018 – 2021 NX 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head Gasket –
Removal / Installation
2016 – 2017 IS 200t and 2018 – 2024 IS 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head Gasket –
Removal / Installation
2016 – 2017 GS 200t and 2018 – 2019 GS 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head Gasket –
Removal / Installation
2016 – 2017 RC 200t and 2018 – 2024 RC 300:
Engine/Hybrid System – 8AR-FTS (Engine Mechanical) – Cylinder Head Gasket –
Removal / Installation
© 2024 Lexus, a division of Toyota Motor Sales, USA
L-SB-0007-21
Rev1
March 30, 2021
Page 7 of 7
MIL ON With Air-Fuel Ratio Imbalance and/or Cylinder Misfire DTCs
Repair Procedure (continued)
5. Using GTS+, clear ANY DTCs and complete the confirmation driving pattern based on the
original DTC(s) that was(were) set, to confirm the DTC(s) does(do) not reset.
NOTE
If BOTH Air-Fuel Ratio Imbalance and Cylinder Misfire DTCs were present, perform confirmation
driving patterns in BOTH substeps A and B. Otherwise, continue to substep A for Cylinder Misfire
DTCs and go to substep B for Air-Fuel Ratio Imbalance DTCs.
A. Refer to TIS, applicable model and model year Repair Manual:
2015 NX 200t:
Engine/Hybrid System – 8AR-FTS (Engine Control) – SFI System –
P030000,P030027,P030085-P030400; Random/Multiple Cylinder Misfire Detected
NOTE
This drive pattern is for 2015 model year NX 200t vehicles but also applies to ALL applicable
model year NX 200t, NX 300, GS 200t, GS 300, RC 200t, RC 300, IS 200t, and IS 300
model vehicles.
B. Refer to TIS, applicable model and model year Repair Manual:
2015 NX 200t:
Engine/Hybrid System – 8AR-FTS (Engine Control) – SFI System –
P11EA00,P11EC00-P11EF00,P219A00,P219C00-P219F00; Bank 1
Air-Fuel Ratio Imbalance (Port)
NOTE
This drive pattern is for 2015 model year NX 200t vehicles but also applies to ALL applicable
model year NX 200t, NX 300, GS 200t, GS 300, RC 200t, RC 300, IS 200t, and IS 300
model vehicles.
© 2024 Lexus, a division of Toyota Motor Sales, USA
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TSB/Document ID: L-SB-0007-21 Rev1
Replacement Service Bulletin Number:
MFR Communication Date: 2024-04-17
MFR Internal Campaign ID/Software Version: L-SB-0007-21
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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