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 PLATINUMREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXDTC INDEX (1 OF 6)DOOR LOCK DTCSWIRELESS DOOR LOCK CONTROL SYSTEM
2025 Toyota Highlander Platinum
Wireless Door Lock Control System
2025 Toyota Highlander PlatinumSECTION Wireless Door Lock Control System
WIRELESS DOOR LOCK CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [12/2019 - 11/2023]
| DTC Code | Description |
|---|---|
| B1242 | Wireless Door Lock Tuner Circuit Malfunction |
WIRELESS DOOR LOCK CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [11/2023 - ]
| DTC Code | Description |
|---|---|
| B1242-96 | Wireless Door Lock Tuner Component Internal Failure |
RENDER: 1.0x
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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.