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
Monitor Strategy
MONITOR STRATEGY
| Related DTCs | P0450: Evaporative emission control system pressure sensor/switch chattering P0451: Evaporative emission control system pressure sensor noise P0451: Evaporative emission control system pressure sensor stuck P0452: Evaporative emission control system pressure sensor/switch low input P0453: Evaporative emission control system pressure sensor/switch high input |
| Required Sensors / Components | Pump module |
| Frequency of Operation | Once per driving cycle: P0451 sensor stuck Continuous: P0451 sensor noising, P0450, P0452 and P0453 |
| Duration | Less than 15 seconds: P0451 (Pressure sensor noise) Within 2 minutes: P0451 (Pressure sensor stuck) 0.5 seconds: P0450, P0452, P0453 |
| MIL Operation | Immediate: P0450, P0452, P0453 2 driving cycles: P0451 |
| Sequence of Operation | None |
Factory Service Tools
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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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