FIXED: Gen 2 Prius P0443 Evaporative Emission Control System Purge Control Valve Circuit

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by afia2k8, Mar 12, 2020.

  1. afia2k8

    afia2k8 New Member

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    Just wanted to share with everyone how I fixed this code, because I couldn't find a solution anywhere.

    I had this fault code on my 2004 Prius. I know it's a fault with the Evap system, and relates to a similar diagnosis for P0440 and P0446. Changing the Fuel cap with my other 2006 Prius didn't work.

    I believe this specific code implies a fault in the Evap VSV solenoid (below the air intake pipe in the bonnet). Toyota wanted £100 for first hour to diagnose, and £80 for a genuine part. I just got a salvaged one off ebay for £15 which fixed the problem. Really easy to replace, just one screw, and you don't even have to remove the air intake pipe.

    Basically I tried applying current to the old one with a 9v battery plus crocodile clips and it didn't click open anymore. The replacement does. 100 miles now and engine management light hasn't come back on again.
     
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  2. SFO

    SFO Senior Member

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    Welcome to PriusChat!!

    Could you please post a picture of the part, or list a part #
     
  3. afia2k8

    afia2k8 New Member

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    It is a Evap Purge VSV Solenoid valve, part# 90910-12259

    evap purge vsv.PNG purge vsv.jpg
     
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  4. Andrew_Ph

    Andrew_Ph Junior Member

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    There are 3 of them, 2 in the back above the fuel tank. I had similar code. Checked that one and it was fine. I ended up checking and replacing one of them that was in the back (it is 2 throw or 3 inlet), the hardest one to get to. I just grabbed any one out of a wrecking yard that worked and had the same inlets, since they are all basically the same.
     
  5. ChapmanF

    ChapmanF Senior Member

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    This is a good thread. The key takeaway is that the trouble codes don't tell you directly what thing to blindly replace; the codes tell you what things need to be checked, and from that you find out in your specific case what to replace. Good stuff.
     
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  6. kenoarto

    kenoarto Senior Member

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    I was going do this repair after a cheap replacement cap from Amazon didn't work, then I tried putting some saliva after each fill-up and has been working for the last 6 months. Go figure.
    Posted via the PriusChat mobile app.
     
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  7. dolj

    dolj Senior Member

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    Where?
     
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