T-SB-0084-23

October 17, 2023

MIL ON With DTC(s) P25B372 and/or P030000
Service
Category

Engine/Hybrid System

Section

Engine Control

Market USA

Applicability
YEAR(S)

MODEL(S)

2023

GR Corolla

ADDITIONAL INFORMATION

Introduction

Some 2023 model year GR Corolla vehicles may exhibit a MIL ON condition with one or both of
the following Diagnostic Trouble Codes (DTCs):



P25B372 – Turbocharger Wastegate “A” Actuator Stuck Open
P030000 – Random Cylinder Misfire

The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been
modified to address these conditions. Follow the Repair Procedure in this bulletin to address
these conditions.

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

EL2307

Reprogram the ECM (PCM)

0.7

89661-1AE30

8A

74

APPLICABLE WARRANTY
 This repair is covered under the Toyota 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.

© 2023 Toyota Motor Sales, USA

Page 1 of 3

T-SB-0084-23

October 17, 2023

Page 2 of 3

MIL ON With DTC(s) P25B372 and/or P030000
Parts Information
PART NUMBER

PART NAME

QTY

89661-1AE30

Computer, Engine Control (ECM/PCM)

–

NOTE
The ECM (PCM) should NOT be replaced as part of the Repair Procedure.

Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

Battery Diagnostic Tool

DCA-8000P T

QTY

*Essential SST.

NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.

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 2023.03.002.02 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.

© 2023 Toyota Motor Sales, USA

T-SB-0084-23

October 17, 2023

Page 3 of 3

MIL ON With DTC(s) P25B372 and/or P030000
Calibration Information
CALIBRATION ID
MODEL

TRIM
PREVIOUS

NEW

Core/Circuit

8A2201203100
8A2301203100

8A2201203200
8A2301203200

Morizo

8A2201209100
8A2301209100

8A2201209200
8A2301209200

GR Corolla

Repair Procedure

1. Confirm the condition exists.
Does the vehicle exhibit a MIL ON condition with one or both of the following DTC(s)?


P25B372 – Turbocharger Wastegate “A” Actuator Stuck Open



P030000 – Random Cylinder Misfire



YES — Continue to step 2.



NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

2. Use GTS+ to confirm if the ECM (PCM) calibration has been updated.
Is the calibration ID listed in GTS+ the latest ECM (PCM) calibration?


YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.



NO — Continue to step 3.

3. 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 station, refer to the DCA-8000 Instruction Manual
located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.

Follow the procedures outlined in Service Bulletin T-SB-0107-20 GTS+ ECU Flash
Reprogramming Procedure With Security Signature, and flash the ECM (PCM) with the NEW
calibration file update.
4. Clear ANY DTC(s) and test-drive the vehicle to confirm the condition no longer exists.

© 2023 Toyota Motor Sales, USA