NHTSA ID Number: 10235227
Manufacturer Communication Number: LSB004419
TSB/Document Date: 2023-05-01
Summary
TSB: Some 2016 ? 2019 model year RX 450h and 2018 ? 2019 model year RX 450hL vehicles may exhibit a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs): ?P0301 ? Cylinder 1 Misfire Detected ?P0302 ? Cylinder 2 Misfire Detected ?P0303 ? Cylinder 3 Misfire Detected ?P0304 ? Cylinder 4 Misfire Detected ?P0305 ? Cylinder 5 Misfire Detected ?P0306 ? Cylinder 6 Misfire Detected Follow the Repair Procedure in this bulletin to address this condition.
L-SB-0044-19
Rev1
November 18, 2019
MIL ON With Misfire DTC(s) P0301, P0302, P0303,
P0304, P0305, and/or P0306
Service
Category
Engine/Hybrid
System
Section
Engine Control
Market USA
Applicability
YEAR(S)
MODEL(S)
2016 - 2019
RX450H
ADDITIONAL INFORMATION
REVISION NOTICE
February 15, 2023 Rev1:
The Service Category indicator has been changed to Engine/Hybrid Control.
The Section indicator has been changed to Engine Control.
Any previous printed versions of this bulletin should be discarded.
Introduction
Some 2016 – 2019 model year RX 450h and 2018 – 2019 model year RX 450hL vehicles may exhibit a
MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs):
P0301 – Cylinder 1 Misfire Detected
P0302 – Cylinder 2 Misfire Detected
P0303 – Cylinder 3 Misfire Detected
P0304 – Cylinder 4 Misfire Detected
P0305 – Cylinder 5 Misfire Detected
P0306 – Cylinder 6 Misfire Detected
Follow the Repair Procedure in this bulletin to address this condition.
© 2023 Lexus, a division of Toyota Motor Sales, USA
Page 1 of 7
L-SB-0044-19
Rev1
November 18, 2019
Page 2 of 7
MIL ON With Misfire DTC(s) P0301, P0302, P0303, P0304, P0305, and/or P0306
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EG1915
Engine ECM Reprogramming
and R & R Ignition Coil
2.8
89661-#####*
8A
74
*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 Federal Emission Warranty. This warranty is in effect for
96 months or 80,000 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.
Parts Information
PART NUMBER
PART NAME
QTY
90919-02280
90919-A2013
Coil Assy, Ignition
1
89661-#####
Computer, Engine Control
–
00451-00001-LBL
Authorized Modifications Labels
1
NOTE
The ECM (PCM) should NOT be replaced as part of the Repair Procedure.
Authorized Modifications Labels may be ordered in packages of 25 from the Materials Distribution
Center (MDC) (portal.toyotamdc.com) under item No. 0045100001LBL.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0044-19
Rev1
November 18, 2019
Page 3 of 7
MIL ON With Misfire DTC(s) P0301, P0302, P0303, P0304, P0305, and/or P0306
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
PART NUMBER
Techstream ADVi*
TSADVUNIT
Techstream 2.0
Techstream Lite
QTY
TS2UNIT
ADE
1
TSLITEPDLR01
Techstream Lite (Green Cable)
TSLP2DLR01
*Essential SST.
NOTE
Only ONE of the Techstream units listed above is required.
Software version 17.30.011 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer
Equipment (ADE) at 1-800-368-6787.
Use Techstream or an approved J2534 interface to perform flash reprogramming updates.
Visit techinfo.toyota.com for more information regarding J2534 reprogramming.
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
Battery Diagnostic Tool*
DCA-8000P T
1
*Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0044-19
Rev1
November 18, 2019
Page 4 of 7
MIL ON With Misfire DTC(s) P0301, P0302, P0303, P0304, P0305, and/or P0306
Calibration Information
YEAR
MODEL
ENGINE
NEW
348Q4000
348Q4100
348Q4200
348Q4300
348Q4400
348N0000
348N0100
348N0200
348V6000
348V6100
348V6200
RX4 50hL
348T1000
348T1100
348T1200
RX 450h
348Z3000
348Z3100
RX 450hL
348Z4000
348Z4100
2016
RX 450h
2017
2GR-FXS
2018
2019
CALIBRATION ID
PREVIOUS
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit a MIL ON condition with ANY of the DTCs in the
introduction present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Diagnose the misfire DTC(s).
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 RX 450h:
Engine/Hybrid System – Engine Control:
“2GR-FXS (Engine Control): SFI System: P0300-P0306; Random / Multiple
Cylinder Misfire Detected”
2018 RX 450h and RX 450hL:
Engine/Hybrid System – Engine Control:
“2GR-FXS (Engine Control): SFI System: P0300 – P0306; Random / Multiple
Cylinder Misfire Detected”
2019 RX 450h and RX 450hL:
Engine/Hybrid System – Engine Control:
“2GR-FXS (Engine Control): SFI System: P0300 – P0306; Random / Multiple
Cylinder Misfire Detected”
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0044-19
Rev1
November 18, 2019
Page 5 of 7
MIL ON With Misfire DTC(s) P0301, P0302, P0303, P0304, P0305, and/or P0306
Repair Procedure (continued)
3. Does the diagnosis indicate a malfunctioning ignition coil?
YES — Continue to step 3.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
4. Use Techstream to confirm if the ECM (PCM) calibration has been updated and check for
the Authorized Modifications Label affixed to the vehicle in the location shown below.
Is the calibration ID listed in Techstream and on the label the latest ECM (PCM) calibration?
YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NO — Continue to step 5.
Figure 1. Location of Authorized Modifications Label on 2016 – 2019 RX 450h and 2018 – 2019 RX 450hL
1
2
4
3
5
1
Replacement ECM (PCM) Part Number
(e.g., 90919-02280)
4
Date Completed
2
New Calibration ID (e.g., 348Q4400)
5
This SB Number
3
Dealer Code
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0044-19
Rev1
November 18, 2019
Page 6 of 7
MIL ON With Misfire DTC(s) P0301, P0302, P0303, P0304, P0305, and/or P0306
Repair Procedure (continued)
5. Flash reprogram the ECM (PCM).
NOTE
The battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage at
13.5V while flash reprogramming the vehicle.
For details on how to use the battery diagnostic tool, refer to the DCA-8000 Instruction Manual
located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.
6. Follow the procedures outlined in Service Bulletin L-SB-0001-18, Techstream ECU Flash
Reprogramming Procedure, and flash the ECM (PCM) with the NEW calibration file update.
7. Prepare and install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
ECM (PCM) part number [Refer to the Parts Information section for the NEW
PART NUMBER]
Calibration ID(s) [Refer to the Calibration Information section for the
NEW CALIBRATION ID]
Dealer Code
Repair Date
Change Authority [This bulletin number]
B. Install the Authorized Modifications Label onto the vehicle at the location shown in
Figure 1. The Authorized Modifications Label is available through the MDC,
P/N 00451-00001-LBL.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0044-19
Rev1
November 18, 2019
Page 7 of 7
MIL ON With Misfire DTC(s) P0301, P0302, P0303, P0304, P0305, and/or P0306
Repair Procedure (continued)
8. Replace the ignition coil.
A. Remove the subject ignition coil.
Refer to TIS, applicable model and model year Repair Manual.
2016 RX 450h:
Engine/Hybrid System – Engine Control:
“2GR-FXS (Engine Control): Ignition Coil and Spark Plug: Removal”
2017 – 2019 RX 450h:
Engine/Hybrid System – Engine Control:
“2GR-FXS (Engine Control): Ignition Coil and Spark Plug: Removal”
2018 – 2019 RX 450hL:
Engine/Hybrid System – Engine Control:
“2GR-FXS (Engine Control): Ignition Coil and Spark Plug: Removal”
B. Install the NEW ignition coil.
Refer to TIS, applicable model and model year Repair Manual.
2016 – 2019 RX 450h and 2018 – 2019 RX 450hL:
Engine/Hybrid System – Engine Control:
“2GR-FXS (Engine Control): Ignition Coil and Spark Plug: Installation”
9. Test-drive the vehicle to confirm proper operation.
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TSB/Document ID: LSB004419
Replacement Service Bulletin Number:
MFR Communication Date: 2023-02-15
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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