2018-2021 Toyota Engine Maintenance Required TSB P268111 P268115

Toyota has released Technical Service Bulletin (TSB) T-SB-0112-24, Revision 2 (Rev2), dated December 5, 2024, to address a specific issue affecting certain 2018-2021 Toyota vehicles. Owners of these vehicles, equipped with A25A-FKS, A25A-FXS, or M20A-FKS engines, may notice an "Engine Maintenance Required" message appearing in the Multi-Information Display (MID). This warning is typically accompanied by Diagnostic Trouble Codes (DTCs) P268111 and/or P268115, which point to a problem with the engine coolant bypass valve circuit. This TSB provides technicians with the necessary steps to diagnose and repair this condition.

Symptoms

Owners of affected 2018-2021 Toyota models may observe the following symptom:

• An "Engine Maintenance Required" message displayed in the Multi-Information Display (MID).

This message indicates that the vehicle's engine management system has detected a fault requiring attention. If you encounter the "Toyota Camry Engine Maintenance Required" message, it's important to have your vehicle inspected promptly.

Fault Codes / DTCs

When the "Engine Maintenance Required" message appears, a diagnostic scan will likely reveal one or both of the following Diagnostic Trouble Codes (DTCs):

• P268111: Engine Coolant Bypass Valve Circuit Short to Ground
• P268115: Engine Coolant Bypass Valve Circuit Short to Battery or Open

These codes specifically indicate an electrical fault within the engine coolant bypass valve circuit, signaling that the valve is not operating as intended.

Diagnosis / Trigger Conditions

To confirm the condition, a technician will follow a precise diagnostic process:

1. Confirm Condition: The technician will first verify that the "Engine Maintenance Required" message is actively displayed in the vehicle's Multi-Information Display (MID). If this message is not present, the bulletin does not apply, and further diagnosis should follow the applicable Repair Manual.
2. DTC Check: Using the Toyota Global Techstream (GTS+) diagnostic tool, the technician will perform a Health Check. This check will identify if Diagnostic Trouble Codes P268111 (Engine Coolant Bypass Valve Circuit Short to Ground) or P268115 (Engine Coolant Bypass Valve Circuit Short to Battery or Open) are stored in the vehicle's system. If these DTCs are not found, the bulletin does not apply, and diagnosis should continue with the Repair Manual.

Repair Procedure Summary

The repair involves replacing either the water valve or the water bypass valve hose assembly No. 1, depending on the specific vehicle model. The general steps are as follows:

1. Vehicle Identification: The technician will determine if the vehicle is a Corolla or Corolla Hatchback. If so, the repair proceeds to Step 5. If not, the technician will check if it's an Avalon, Avalon HV, Camry, Camry HV, Highlander HV, RAV4, RAV4 HV, RAV4 Prime, Sienna HV, or Venza HV. If it's one of these models, the repair proceeds to Step 6. If none of these apply, the bulletin does not apply.
2. Component Removal (Corolla/Corolla Hatchback): For Corolla and Corolla Hatchback models, the existing water valve is removed. This process requires referring to the Toyota Technical Information System (TIS) Repair Manual for specific instructions tailored to the vehicle's model year and engine type (M20A-FKS Cooling - Flow Shutting Valve for Heater - Removal).
3. Component Installation (Corolla/Corolla Hatchback): A new water valve is then installed. The installation procedure also references the TIS Repair Manual for the M20A-FKS Cooling - Flow Shutting Valve for Heater - Installation steps.
4. Component Removal (Other Models): For Avalon, Camry, RAV4, Highlander, Sienna, and Venza models (including HV and Prime variants), the water bypass valve hose assembly No. 1 is removed. Technicians must consult the TIS Repair Manual for the A25A-FKS or A25A-FXS Cooling - Flow Shutting Valve Removal procedures, often with specific notes to perform only certain steps (e.g., steps 2-3).
5. Component Installation (Other Models): A new water bypass valve hose assembly No. 1 is installed. The installation process also requires referencing the TIS Repair Manual for the A25A-FKS or A25A-FXS Cooling - Flow Shutting Valve Installation procedures, again with specific instructions to perform only certain steps (e.g., steps 1, 3, and 4).
6. Final Verification: After the component replacement, the technician will use the GTS+ diagnostic tool to clear any stored DTCs. A test drive of the vehicle will then be performed to confirm that the condition has been resolved and the "Engine Maintenance Required" message no longer appears.

Required Tools or Parts

Technicians will require specific tools and parts to perform this repair:

Required Equipment:

• Techstream ADVi: Part Number TSADVUNIT (supplied by ADE)
• Techstream Lite: Part Number TSLITEPDLR01 (supplied by ADE)
• Techstream Lite (Green Cable): Part Number TSLP2DLR01 (supplied by ADE)

Only one of the Techstream units listed above is required. The GTS+ software version 2025.01.005.02 or later is also necessary. Additional Techstream units can be ordered by contacting Approved Dealer Equipment (ADE).

Replacement Parts (Vehicle-Specific):

Model(s)	Previous Part Number	New Part Number	Part Name	QTY
Corolla, Corolla Hatchback	16671-F2010	16671-F2030	Valve, Water	1
Avalon, Camry, RAV4	16260-F0010	16260-F0300	Valve, Water	1
Avalon HV, Camry HV, RAV4 HV, RAV4 Prime, Venza HV	16260-F0021	16260-F0310	Hose Assy, Water By-Pass, No. 1	1
Highlander HV, Sienna HV	16260-F0100	16260-F0330	Hose Assy, Water By-Pass, No. 1	1
Sienna HV (Mexico Spec)	16260-F0140	16260-F0340	Hose Assy, Water By-Pass, No. 1	1
All		00272-SLLC2	Coolant - Super Long Life	1

Important Warnings

• Parts Ordering: It is crucial to note that parts are vehicle-specific. Technicians DO NOT order ALL parts listed in this table; only the parts applicable to the specific vehicle being repaired should be ordered.
• Bulletin Revisions: This bulletin, T-SB-0112-24 Rev2, dated December 5, 2024, supersedes previous versions. The revision notice indicates that the Required Tools & Equipment and Repair Procedure sections were updated on June 19, 2025 (Rev2), and the Parts Information and Repair Procedure sections were updated on January 07, 2025 (Rev1). Any previous printed versions of this bulletin should be discarded to ensure the most current repair procedures are followed.
• Warranty Information: For warranty applicability and claim filing instructions, refer to Campaign Publication 24TE04.

Owner Action

If your 2018-2021 Toyota displays an "Engine Maintenance Required" message or you suspect an issue related to DTC P268111 or P268115, it is recommended to visit your authorized Toyota dealership. They have the specialized tools and training to accurately diagnose and perform the necessary repairs according to TSB T-SB-0112-24. This repair, including addressing the "Toyota Camry Engine Maintenance Required" issue, is typically covered under warranty if your vehicle meets the specified conditions outlined in Campaign Publication 24TE04.

NHTSA ID: 11020668