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rpmdiag, Tech and Instructor
Category: Lexus
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Experience:  Since 1975
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Po440, po441 and po446 on a 2002 lexus rx300. what do those mean?

Customer Question

I got a po440, po441 and po446 on a 2002 lexus rx300. what do those mean?
Submitted: 7 years ago.
Category: Lexus
Expert:  rpmdiag replied 7 years ago.



These codes are all related to the EVAP system, telling us that there is a malfunction in purge flow and venting circuit of the system. It's possible that the vent solenoid, circuit or PCM is defective. The best way to go about this would be with a scan tool, doing bi-directional controls to activate and de-activate the purge valve and vent solenoids while watching fuel trims change at the same time. I found most commonly that the vent solenoid is defective. See PIC for location!


Thanks in advance for your ACCEPT and POSITIVE feedback,





Expert:  rpmdiag replied 7 years ago.

Was the oil was just changed before this hapened, If so, it's possible that The CCV hose is loose here.





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