Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2025SEQUOIA CAPSTONEREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - DIAGNOSTIC CODES (12 OF 12), CIRCUIT & SYMPTOM TESTS (1 OF 2)
2025 Toyota Sequoia Capstone
Engine Control System - Diagnostic Codes (12 Of 12), Circuit & Symptom Tests (1 Of 2)
2025 Toyota Sequoia CapstoneSECTION Engine Control System - Diagnostic Codes (12 Of 12), Circuit & Symptom Tests (1 Of 2)
- SFI System
- DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message [09/2022 - ]
- DTC U1152-87: Lost Communication with Hybrid Powertrain Control Module (ch4) Missing Message [09/2022 - ]
- DTC U1156-87: Lost Communication with TCM (ch2) Missing Message [09/2022 - ]
- DTC U1157-87: Lost Communication with Drive Motor Control Module "A" (ch3) Missing Message [09/2022 - ]
- DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message [09/2022 - ]
- Turbocharger Oil Leak and White Smoke [09/2022 - ]
- Turbocharger Noise [09/2022 - ]
- EVAP System [09/2022 - ]
- ECM Power Source Circuit [09/2022 - ]
- VC Output Circuit [09/2022 - ]
- Fuel Pump Control Circuit [09/2022 - ]
- Starter System [09/2022 - ]
- Brake Override System [09/2022 - ]
- MIL Circuit [09/2022 - ]
- Ignition Circuit [09/2022 - ]
- Drive Start Control [09/2022 - ]
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.