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 MANUALSTOYOTA2013TUNDRA BASE, 5.7L ENG VIN WREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSENGINE IMMOBILISER SYSTEM (DIAGNOSTIC CODES & CIRCUIT TESTS)ENGINE IMMOBILIZER SYSTEMDTC B2793: TRANSPONDER CHIP MALFUNCTION; DTC B2794: UNMATCHED ENCRYPTION CODE; DTC B2795: UNMATCHED KEY CODEPROCEDURE
2013 Toyota Tundra Base, 5.7L Eng VIN W
DTC B2793: Transponder Chip Malfunction; DTC B2794: Unmatched Encryption Code; DTC B2795: Unmatched Key Code: Procedure
2013 Toyota Tundra Base, 5.7L Eng VIN WSECTION Procedure
- REREGISTER KEY
- Clear the DTCs. Refer to DTC CHECK / CLEAR .
- Reregister the key code with the transponder key ECU. Refer to REGISTRATION - Step 2 .
- Check that the engine starts with the key.
OK
Engine starts.
NG → REPLACE KEY
OK → END
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.