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 MANUALSTOYOTA2009SEQUOIA LIMITED, 5.7 Y, RWDREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSTHEFT DETERRENT & KEYLESS ENTRYENGINE IMMOBILIZER SYSTEMDTC B2793 TRANSPONDER CHIP MALFUNCTION; DTC B2794 UNMATCHED ENCRYPTION CODE; DTC B2795 UNMATCHED KEY CODEDESCRIPTION
2009 Toyota Sequoia Limited, 5.7 Y, RWD
DTC B2793 Transponder Chip Malfunction; DTC B2794 Unmatched Encryption Code; DTC B2795 Unmatched Key Code: Description
2009 Toyota Sequoia Limited, 5.7 Y, RWDSECTION Description
- B2793 is output when a malfunction is found in the key during key code registration or a key code is not registered normally. Replace the key if the key code registration cannot be performed normally and this DTC is detected.
- B2794 is output when a key with an incomplete key code is inserted into the ignition key cylinder.
- B2795 is output when a key with a key code that has not been registered in the ECU is inserted into the ignition key cylinder.
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2793 | When attempting to register an ID code, the registration does not complete normally | Key |
| B2794 | A registered key is inserted into the ignition key cylinder, but key comparison indicates that the security code is incorrect. | |
| B2795 | A key with a different ID code (an unregistered key) is inserted into the ignition key cylinder. |
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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.