2021 Toyota Engine Maintenance Required P268111 P268115

Symptoms

Owners of certain 2021 Toyota vehicles may observe an "Engine Maintenance Required" message displayed in the Multi-Information Display (MID). This warning indicates a potential issue within the engine's cooling system.

Fault Codes / DTCs

When the "Engine Maintenance Required" message appears, the vehicle's diagnostic system may store specific Diagnostic Trouble Codes (DTCs). These codes point to electrical circuit issues within the engine coolant bypass valve.

Code	Description
P268111	Engine Coolant Bypass Valve Circuit Short to Ground
P268115	Engine Coolant Bypass Valve Circuit Short to Battery or Open

Diagnosis / Trigger Conditions

To confirm this condition, a technician will first verify if the "Engine Maintenance Required" message is present in the MID. Subsequently, a Health Check will be performed using a diagnostic tool like GTS+ to check for the presence of DTC P268111 or P268115. This confirms the cooling system circuit fault.

Repair Procedure Summary

This Technical Service Bulletin (TSB) outlines the steps to address the "Engine Maintenance Required" message and associated DTCs. The repair involves replacing a specific component in the engine's cooling system, depending on the vehicle model.

For 2021 Corolla and Corolla Hatchback models, the water valve is replaced. For other affected models, including the 2021 Toyota Camry, Avalon, Highlander HV, RAV4, Sienna HV, and Venza HV, the water bypass valve hose assembly No. 1 is replaced. Technicians must refer to the Toyota Technical Information System (TIS) for detailed, model-specific removal and installation instructions for these components.

After the replacement is complete, all Diagnostic Trouble Codes (DTCs) must be cleared using the GTS+ diagnostic software. A subsequent test drive is required to ensure the condition has been fully resolved and the "Engine Maintenance Required" message no longer appears.

Required Tools or Parts

Specialized diagnostic equipment and specific parts are required for this repair:

• Diagnostic Tools:
  • Techstream ADVi (Part Number: TSADVUNIT)
  • Techstream 2.0 (Part Number: TS2UNIT)
  • Techstream Lite (Part Number: TSLITEPDLR01)
  • Techstream Lite (Green Cable) (Part Number: TSLP2DLR01)
  • GTS+ Software version 2024.03.004.02 or later
• Parts:
  • Valve, Water (various part numbers, e.g., 16671-F2030 for Corolla)
  • Hose Assy, Water By-Pass, No. 1 (various part numbers, e.g., 16260-F0300, 16260-F0310, 16260-F0330, 16260-F0340)
  • Coolant - Super Long Life (Part Number: 00272-SLLC2)

Important Warnings

Parts are vehicle specific. Technicians should NOT order all parts listed in the table within the bulletin, but rather identify the correct part number for the specific vehicle being repaired. For warranty applicability and claim filing instructions, refer to Campaign Publication 24TE04.

Owner Action

If your 2021 Toyota Camry or other affected model displays an "Engine Maintenance Required" message or you suspect it has DTC P268111 or P268115, it is recommended to contact an authorized Toyota dealership. They have the necessary diagnostic tools and parts to correctly diagnose and repair this condition.

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Source: NHTSA ID 11012731