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 MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 842 (ENGINE IMMOBILIZER SYSTEM - DIAGNOSIS)DIAGNOSTIC TROUBLE CODE CHART
2004 Toyota Matrix XR, FWD, Standard
Diagnostic Trouble Code Chart
2004 Toyota Matrix XR, FWD, StandardSECTION Diagnostic Trouble Code Chart
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
DTC CONDITION DETECTION CHART
| DTC No. | Detection Item | Trouble Area |
|---|---|---|
| B2780 | Key Unlock Warning Switch Malfunction |
|
| B2793 | Transponder Chip Malfunction |
|
| B2794 | Unmatched Encryption Code |
|
| P0513 | Unmatched key code |
|
| B2796 | No communication in immobiliser system |
|
| B2797 | Communication malfunction No. 1 |
|
| B2798 | Communication malfunction No.2 |
|
| B2799 | Engine immobiliser system |
|
RENDER: 1.0x
NO RELATED
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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.