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Replace Evaporative Emissions (EVAP) Vacuum Switching Valve (VSV)

2312 Views 10 Replies 3 Participants Last post by  wagegapracer
Hi all,

I have an xB it just passed 294k, and I've had a P0011 code for a while, apparently I fixed it because the last obd read I did doesn't have it but I still have similar symptoms, loss of power, that "open" sound around 3.5k isn't really there, a slight fluttery idle, but if I didn't surpass like 45mphish for an extended period of time the light would come off and I'd have vvti again for about 30 minutes of highway driving.

But lately it's been constantly on and I had it scanned by AutoZone today and it recommended to replace the EGR Vacuum Solenoid, I was wondering if this is the thing it's talking about, and where I could find one as Google results look different from what I have, plus there doesn't seem to be any videos for the 1nz to fix it.

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i believe this is the one to look for......under engine cover somewhere? can't tell from pic but i think so.....

Hey I appreciate it, I can take a look and see where that might be, the listing has a pic of where it's supposed to be 馃憤
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that is purge valve for evap.....deals with tank vapors. egr is exhaust gas and would be a different unit between exhaust manifold and throttle body. On my mazda, carbon would start making that egr valve not close and would cause car to die at idle. cleaning the carbon out of egr with brake cleaner was the fix. not sure this would be the case for the xB tho...
Well this is a revelation, apparently I don't have an EGR valve? At least according to this picture, where it's setup on my car is to the purge valve, and on this other car it's to the EGR thing I'm supposedly supposed to replace, afaik it's been like that for 2-3 years I've had the intake on and I've only started having issues recently..

My car:
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Amazon reviewer's car:
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But also an update maybe I should've read closer, I'm getting P0442, P0420, P0441 and P0446, I'm not sure which one breaks VVTI but that one is most important to me
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P0442 = evap small leak
P0420 = catalyst system inefficiency
P0441 = incorrect purge flow
P0446 = Evap vent solenoid

All of these seem related to the purge valve in your pic, nevermind the egr one in the 2nd pic. IMO, if you replace that purge valve all codes except maybe the catalyst P0420 should go away but maybe that one is also related to purge valve as a colateral code from the others. Replace the purge valve and clear codes and hopefully none come back.

You can test the purge valve by sucking on the hose nipple and see if it holds pressure on your tongue. If air passes thru it or doesn't hold suction then valve is bad but the electric part could still be bad. Check the connection to it and make sure both wires are intact on the harness side at the plug. It is fairly common for one to get pulled loose from plug. You can also buy the plug connector separately and splice it into harness if that is the issue. If inconclusive just get new valve. They aren't crazy priced.
I'll try that, since I'm kinda at a standstill, I'll lyk any updates
P0442 = evap small leak P0420 = catalyst system inefficiency P0441 = incorrect purge flow P0446 = Evap vent solenoid All of these seem related to the purge valve in your pic, nevermind the egr one in the 2nd pic. IMO, if you replace that purge valve all codes except maybe the catalyst P0420 should go away but maybe that one is also related to purge valve as a colateral code from the others. Replace the purge valve and clear codes and hopefully none come back. You can test the purge valve by sucking on the hose nipple and see if it holds pressure on your tongue. If air passes thru it or doesn't hold suction then valve is bad but the electric part could still be bad. Check the connection to it and make sure both wires are intact on the harness side at the plug. It is fairly common for one to get pulled loose from plug. You can also buy the plug connector separately and splice it into harness if that is the issue. If inconclusive just get new valve. They aren't crazy priced.
sorry for the late reply but the purge valve does hold pressure on my tongue, I'm still having the same issue, the electrical connection looks fine nothing is hanging or broken, I also believe it's running rich bc I'm having a lot of soot and low mpg, should I try a new valve?
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