Post subject: 2001 Toyota Tachoma 3.4 L extra cab 4x4 p0440
Posted: Mon Mar 31, 2008 6:24 pm
Joined: Mon Mar 31, 2008 6:18 pm Posts: 1
Hello, I have an 01 tachoma with p0440 on. the system had one bad solenoid which i replaced there are no leaks in the system and i have checked the other two solenoids, one i can turn on and off with the scan tool, the other has battery voltage and if i apply ground to it it opens. any ideas?
Post subject: Re: 2001 Toyota Tachoma 3.4 L extra cab 4x4 p0440
Posted: Thu Apr 03, 2008 7:29 am
Technician
Joined: Sat Nov 11, 2006 8:16 am Posts: 108 Location: dominican republic (british)
Circuit Description. Vapor pressure sensor and vapor pressure sensor Vacuum Switching Valve (VSV) are used to detect abnormalities in the EVAP system. DTC is set if a leak is detected in EVAP system or vapor pressure sensor malfunctions. Possible causes are: 1 Damaged, disconnected or restricted vacuum hose(s) or tubes. 2 Fuel tank cap is loose or improperly installed. 3 Defective fuel tank cap.(MOST OVER LOOKED PROBLEM) 4 Damaged fuel tank. 5 Defective charcoal canister. 6 Vapor pressure sensor circuit is open or shorted. 7 Defective vapor pressure sensor. 8 Defective ECM.
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