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 MANUALSLEXUS2005ES 330REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMSFI SYSTEM - DIAGNOSTICSDTC P0442, P0455, P0456: EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (SMALL LEAK)/ (GROSS LEAK)/ (VERY SMALL LEAK)TYPICAL ENABLING CONDITIONS
2005 Lexus ES 330
Typical Enabling Conditions
2005 Lexus ES 330SECTION Typical Enabling Conditions
P0442, P0455, P0456
ENABLING CONDITION
| The monitor will run whenever the following DTCs are not present | See LIST OF DISABLE A MONITOR |
| 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 11.1°C (-12.6 to 20°F) |
| Purge VSV, CCV | Not operated by scan tool |
| Either of the following condition 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 |
P0456 (EVAP 0.02 INCH LEAK):
| Engine start ECT | 4.4 to 32°C (40 to 90°F) |
| Engine start IAT | 4.4 to 32°C (40 to 90°F) |
| IAT | 4.4°C (40°F) or more |
| Either of following condition A or B is met | - |
| A. Vehicle speed change before EVAP system monitor when vehicle speed is 64 km/h (40mph) or more | Vehicle is driven at steady speed for 15 seconds |
| B. Vehicle speed change before EVAP system monitor when vehicle speed is less than 64 km/h (40mph) | Vehicle is driven at steady speed for 60 seconds |
| Fuel slosh | No sloshing (i.e., fairly smooth road) |
| Time after engine start | Below 50 minutes |
| FTP change before vacuum introduction | Minimum change |
| Fuel tank level | Below 90 % |
| 0.04 inch leak | Not detected |
| CCV malfunction | Not detected |
| Vehicle speed | Steady speed |
| Vehicle speed | Below 130 km/h (81 mph) |
| EVAP VSV malfunction | Not detected |
| FTP when vacuum introduction completed | Below -2.6 kPa (-19.5 mmHg) |
P0455, P0442 (EVAP GROSS LEAK, EVAP 0.04 INCH LEAK)
| Engine start ECT | 4.4 to 35°C (40 to 95°F) |
| Engine start IAT | 4.4 to 35°C (40 to 95°F) |
| IAT | 4.4°C (40°F) or more |
| Vehicle speed | Steady speed |
| Fuel slosh | No sloshing (i.e., fairly smooth road) |
| Time after engine start | Below 50 minutes |
| FTP change before vacuum introduction | Minimum change |
| Fuel tank level | Below 90 % |
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.