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 18 (ENGINE CONTROL SYSTEM SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P1455: FUEL TANK LEAK DETECTEDDIAGNOSIS & REPAIR
2004 Toyota Matrix XR, FWD, Standard
Diagnosis & Repair
2004 Toyota Matrix XR, FWD, StandardSECTION Diagnosis & Repair
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
- Using Toyota hand-held tester or scan tool, check for any other DTCs. If only DTC P1455 exists, go to next step. If other DTCs exists, diagnose and repair those DTCs first and then retest.
- Remove fuel tank. See FUEL PUMP under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article for fuel tank servicing procedures. Turn fuel tank upside down and check that fuel does not come out of fuel tank from any other areas than the main fuel hose.
- If fuel does not come out of fuel tank in any other areas than the main fuel, replace ECM. ECM is located behind glove box. See Figure. If fuel comes out of fuel tank in any other areas than the main fuel hose, replace fuel tank. It may be necessary to check and replace charcoal canister and hoses to intake manifold. Charcoal canister is located near fuel tank. See Figure.
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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.