I’ve been having P0441 & P0455 codes showing up on my 2007 Corolla CE. My code reader tells me the areas that need checked. But, I can’t find the vacuum switching valve on it so that I can check it for problems. Somebody said it’s under the hood, but I can’t seem to locate it.
Is is possible that it’s mounted on the vapor canister (which I have located above the rear axle)?
There are many emissions components that can throw those codes. I checked a couple of Toyota owner’s sites and the common problems were loose/bad gas caps, purge VSV and holes or cracks in the purge hose. I believe the emissions components are still under warranty for 8 years so you might want to call a Toyota dealer and find out. It’s always better to spend their money and not yours. You can google “Toyota purge VSV” and there are a lot of different locations listed that might help.
There was a bad batch of main engine computers on that model that would incorrectly control what is called a “purge valve” on the fuel vapor system. If the car has less than 80,000 miles, it’s covered by a federal warranty through the Toyota dealer, and it’s free. T.S.B. # EGO41-07. As long as the valve itself is working correctly (step #1), the computer gets replaced (step #2). I hope it’s got less than 80K, or else this fix gets really pricey out of pocket, provided it’s not a faulty gas cap or an intermittent issue with the vapor lines and components.
This car has close to 140,000 on it. But, I need to know where the VSV is so that I can check it (myself). I’ve been told that the VSV is under the hood. I can’t find it. Or is it on the vapor cannister?
This is the only genuine Toyota vacuum switching valve (VSV) that I could find. I would assume that they all look pretty much the same. The one on my wife’s '07 Nissan Sentra looks just like it. Hope this helps.