This may eventually lead to catalytic converter problems as well as misfiring problems. I thought for a week that the trouble codes had mysteriously gone away on their own, but today they are back. Normally the vent valve is open. A plunger will then move to seal the canister vent. Your still getting a leak from a smoke test or your just getting the codes? Is a vacuum held for at least 1 minute? I took my Sienna to the dealer and told them I was taking responsibility for the troubleshooting, since I did it for 31 years. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations.
Dec 27, 2008 These codes are all for the Evaporative Emissions System. Always make sure that the fuel cap is as tight as you can get it after you refuel. We're not super strict here, but for most of our posts we follow a question-response format. PayPal Was it worth a dollar? Problem has not come back on the passing years. If charcoal canister is okay, go to next step. So what does the Evaporation System do anyway? If I clear the codes they stay off a couple of days and then the same ones come back on. Check vapor pressure sensor connection at fuel pump.
Please read the on the subject for details. I had a perforated or torn air valve at the front of the canister - which you cannot buy separately of course! However, also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. I saw another mechanic shop and just for poops and giggles asked if he had a smoke machine. Linking to outside content is generally not allowed, unless it's germane to the current discussion. Please be sure to reference a year and model-specific repair manual or speak with a qualified professional automotive technician before completing a repair to your vehicle. The Evap System consists of several parts - some under the hood, some connected by long tubes at the fuel tank.
Ok just so I completely understand after you replaced the canister, gas cap, and check valve. Only one tiny screw holds it in it's bracket and I could not get it back in so i zip tied it in there. Engine Mechanical problem 2001 Toyota Sienna 6 cyl Front Wheel Drive Automatic check engine light on for awhile. When things don't change the way they should, the computer sets a code, or four. Then P0440,0441, and 0446 came back. Toyota has re-engineered the part 90910-12271 to solve the problem. If it's got wheels, treads, floats, flies, or has an engine you're good to go.
Are you tired of someone else losing their stuff? Please feel free to respond to me if you have any further questions. The charcoal canister is filled with activated carbon pellets that can absorb the fuel vapors. If money is an issue. All posts without this information may be subject to being removed. Fuel vapors are stored in the charcoal canister. Could you please provide me that one as well? For California, Massachusetts, Maine and Vermont, the Toyota Federal Emissions Warranty is in effect for 36 months or 50,000 miles, whichever occurs first, from the vehicle's in-service date. I have unfortunately verified that the canister closed vsv seems to work just fine.
Hi sehenry2000, Here are the diagnostics. Still have to buy a whole new canister of course. . Went ahead and replaced all three O2 sensors. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
When the engine is running, the fuel vapors are purged from the canister and burned in the engine. Given that you have the incorrect purge flow code and the control valve code together, my bet is that the vent control valve has failed causing the P0446 and is not opening to allow fresh air into the system to displace the air from within the system that is being pulled to the engine. You will get all three of those codes every time that the cap is loose. I was looking for an old friend who is a wiz at cars. If wiring harness or electrical connector is defective, repair as necessary. Also, if you add a link to this page, other owners can share this too.
As well as selling our unique key finder system, when we fix something or discover a solution, we like to share - here is another page to help out. There is a tsb for all 3 codes coming on. I tested everything and checked and replaced cracked hoses. After some serious research on various threads it all came down to the charcoal canister. It's not a problem solver. Cleared it and it came back in 65 miles. No intentionally bad, harmful, or deceptive advice.
Body work questions regarding paint, dents, dings or accident related damages or other bodywork related issues should be posted in If you want an estimate you should take the car to a qualified body shop as they would know best what it will cost in your area and how to fix the damages. Generally there is a good reason why a repair costs what it does. Please help so i will change this part! Smoke was coming out of the filler kneck and a hose that goes from the canister to the gas tank. See if codes come back. Clear the codes and run for a while.