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secondary air pump / smog pump / 2001 VW Passat 1.8T / 4 cylinder/ error code P0411
Sebastian,
Sorry, I've been offline for awhile here. If you want to, contact me directly and we can brain-storm a little (assuming you haven't already figured it out) I'm sure you'll be able to return the favor in vag-com info at some point. -Arthur Sebastian wrote: > Hi Arthur, > it is me again :-( > i replaced the air pump checked the ECR valve (looks good) fuse is > installed and the pump is running (at the startup) but the error code > P0411 sill pops up (again.. and again..) any suggestions? > > O2 sensor (prior to the catalytic converter), the one behind the > catalytic converter was just replaced a few month ago. > > any other ideas? > > THANK's Sebastian > > > Arthur Russell wrote: >> Sebastian, >> >> I believe the fuse is located in the black box mounted on the firewall >> next to the brake fluid reservoir. >> >> Unless you have a cracked hose (either a vacuum control hose, or the >> actual rigid plastic hosing from the pump to the valve) or some other >> fault, then the water in the pump is due to your combination valve >> failing (open). The valve is only supposed to be open when the air pump >> is running. Lots of these valves fail, and they don't close all of the way. >> >> When they stay open (or "leak), then exhaust flows down into and through >> the sec. air pump. The pump body cools the exhaust and the moisture >> condenses out of it. The water builds up and corrodes the pump over >> time. In freezing temperatures,, the water freezing will damage the pump >> even more quickly. >> >> So, replace your pump, and the fuse for it. But also carefully test your >> combination valve, or your new pump may fail the same way. >> >> -Arthur >> >> Sebastian wrote: >> > Hi, my VW passat 2001 engine ATW / 123000miles / Auto-Tranny has the >> > following problem: >> > >> > check engine light came on, scan tool (ross-tech) shows P0411 secondary >> > air pump incorrect flow. I changed the vacuum hoses with the result of >> > having this error code been gone for 1 month (approx.). now the error >> > is back. I found out that the secondary air pump (smog pump) is dead! >> > by unplugging the hoses I got approx. 1/2 gal. water out of the pump >> > :-( >> > >> > new pump approx. 250$ oh well. if that is all.. ok, but where do I find >> > the relay / fuse what powers the pump? relay under the dash but which >> > one is it? >> > my manual says fuse should be 40 Amps. where will that one be located? >> > any idea? >> > any help is appreciated. >> > >> > THX VW-nerd.. Sebastian >> > > |
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