Need help with trouble code P-0450 for a 1997 ES-300
 

Hi all,

I have a 1997 - ES-300. I am having trouble with my VSV sensors that regulate the pressure. These are located under the LEXUS cover. The whole assembly has been replaced. Also, the sensor on the fire wall has been replaced. the Lexus dealership can't figure it out. I drive the vehicle 25 - 30 miles after parts replaced, the engine light illuminates again. My engine light is still indicating the trouble code of P0450 (Evaporative Emission Control System Pressure Sensor Malfunction). The only thing that hasn't been replaced is the sensor on top of the canister and there gas cap. Please, any assistance will be greatly appreciated.