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.
2007 Lexus RX 350 FWDFACTORY OEM SERVICE PROCEDURE
Typical Malfunction Thresholds
- P0450: Pressure sensor chattering TYPICAL MALFUNCTION THRESHOLDS
EVAP pressure Less than 42.11 kPa (316 mmHg), or more than 123.761 kPa (928 mmHg) - P0451: Pressure sensor noise TYPICAL MALFUNCTION THRESHOLDS
Frequency that EVAP pressure change is 0.3 kPa (2.25 mmHg) or more 10 times or more in 10 seconds - P0451: Pressure sensor stuck TYPICAL MALFUNCTION THRESHOLDS
EVAP pressure change during reference pressure measurement Less than 0.65 kPa (4.876 mmHg) - P0452: Pressure sensor low voltage TYPICAL MALFUNCTION THRESHOLDS
EVAP pressure Less than 42.11 kPa (316 mmHg) - P0453: Pressure sensor high voltage TYPICAL MALFUNCTION THRESHOLDS
EVAP pressure More than 123.761 kPa (928 mmHg)
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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