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 686 (ENGINE CONTROL SYSTEM (SFI) (3MZ-FE) - DIAGNOSTICS)DTC P0446: EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL CIRCUITTYPICAL ENABLING CONDITIONS
2004 Toyota Matrix XR, FWD, Standard
Typical Enabling Conditions
2004 Toyota Matrix XR, FWD, StandardSECTION Typical Enabling Conditions
WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not present | See LIST OF DISABLE A MONITORΒ |
|---|---|
| Altitude | Below 2,400 m (8,000 ft) |
| Battery voltage | 11 V or more |
| Throttle position learning | Completed |
| FTP sensor | No malfunction |
| (Engine start IAT) - (Engine start ECT) | -7 to 11.1Ξ©C (-12.6 to 20Β°F) |
| EVAP VSV, CCV | Not operated by scan tool |
| Either of the following conditions 1 or 2 is met | - |
| 1. Purge duty cycle | 6 % or more when intake air amount is 12 g/sec or more |
| 2. Purge concentration for 30 seconds | -5 %/% or more when vehicle speed is less than 10 km/h (6 mph) |
| Refuel during EVAP system monitor | Not refueled with engine running |
| FTP before EVAP system monitor | -1.7 kPa (12.75 mmHg) or more |
P0446Β
TYPICAL ENABLING CONDITIONS (P0446)
| Same as P0442 (EVAP 0.04 leak) | - |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.