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 MANUALSTOYOTA2006SIENNA FWD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSENGINE IMMOBILISER SYSTEM
2006 Toyota Sienna FWD V6-3.3L (3MZ-FE)
Engine Immobiliser System
2006 Toyota Sienna FWD V6-3.3L (3MZ-FE)SECTION Engine Immobiliser System
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, check the circuit listed for that code. For details of each code, turn the "DTC No" in the DTC chart.
1. TRANSPONDER KEY ECU DIAGNOSTIC TROUBLE CODE CHART
2. ECM DIAGNOSTIC TROUBLE CODE CHART
NOTE: The DTC for the immobilizer system is specified above. If other codes are output, check the DTC chart for the hybrid control system.
If a trouble code is displayed during the DTC check, check the circuit listed for that code. For details of each code, turn the "DTC No" in the DTC chart.
B2780-B2798:
1. TRANSPONDER KEY ECU DIAGNOSTIC TROUBLE CODE CHART
B2799:
2. ECM DIAGNOSTIC TROUBLE CODE CHART
NOTE: The DTC for the immobilizer system is specified above. If other codes are output, check the DTC chart for the hybrid control system.
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.