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 MANUALSTOYOTA2025HIGHLANDER XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSSEAT BELTSPRE-COLLISION SYSTEM - DIAGNOSTIC CODESPRE-COLLISION SYSTEMDTC U0100-87: LOST COMMUNICATION WITH ECM/PCM "A" MISSING MESSAGE; DTC U0101-87: LOST COMMUNICATION WITH TCM MISSING MESSAGE; DTC U0126-87: LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE MISSING MESSAGE; DTC U0129-87: LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE MISSING MESSAGE; DTC U0131-87: LOST COMMUNICATION WITH POWER STEERING CONTROL MODULE MISSING MESSAGE; DTC U0293-87: LOST COMMUNICATION WITH HYBRID/EV POWERTRAIN CONTROL MODULE MISSING MESSAGE [11/2023 - ]DESCRIPTION
2025 Toyota Highlander XLE, FWD
DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message [11/2023 - ]: Description
2025 Toyota Highlander XLE, FWDSECTION Description
When a malfunction is detected between various ECUs and sensors, these DTCs are stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0100-87 | Lost Communication with ECM/PCM "A" Missing Message | 3 seconds after the ignition switch is turned to ON, a communication error between the ECM and the forward recognition camera is detected for approximately 1 second or more. | CAN communication system |
| U0101-87 | Lost Communication with TCM Missing Message | for HV Model:
for Gasoline Model:
|
CAN communication system |
| U0126-87 | Lost Communication with Steering Angle Sensor Module Missing Message | 3 seconds or more after the ignition switch is turned to ON, a communication error between the steering sensor and the forward recognition camera is detected for approximately 1 second or more. | CAN communication system |
| U0129-87 | Lost Communication with Brake System Control Module Missing Message | for HV Model
for Gasoline Model
|
CAN communication system |
| U0131-87 | Lost Communication with Power Steering Control Module Missing Message | 3 seconds after the ignition switch is turned to ON, a communication error between the power steering ECU (rack and pinion power steering gear assembly) and the forward recognition camera is detected for approximately 2 seconds or more. | CAN communication system |
| U0293-87 | Lost Communication with Hybrid/EV Powertrain Control Module Missing Message | 3 seconds after the ignition switch is turned to ON, a communication error between the hybrid vehicle control ECU and the forward recognition camera is detected for approximately 1 second or more. | CAN communication system |
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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.