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 631 (ENGINE IMMOBILIZER SYSTEM - DIAGNOSTICS (2AZ-FE (PZEV))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 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description |
|---|---|
| P0513 | UNMATCH KEY CODE |
| B2796 | NO COMMUNICATION IN IMMOBILIZER SYSTEM |
| B2797 | COMMUNICATION MALFUNCTION NO. 1 |
| B2798 | COMMUNICATION MALFUNCTION NO. 2 |
NOTE:
- Codes P0513, B2797 and B2798 may remain as a record that the immobilizer system has activated in the past.
- The diagnosis code on the immobilizer system is specified in this chart. If any other code is output, check the diagnostic code chart on the engine control system. (See DIAGNOSTIC TROUBLE CODE CHART ).
HINT:
- The "SAE code" indicates a code output when using the hand-held tester.
- The "lamp" indicates a code output when using the malfunction indicator lamp. (See DIAGNOSTIC TROUBLE CODE CHART ).
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.