Question about 1991 Toyota Camry

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What does the check valve connected to the bottom of the charcoal cannister attach to?

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There should be one line that goes to the intake and one that goes to the fuel tank. If you have those 2, a third I think just vents to the air to let air into the cannister.

Posted on Sep 13, 2010

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1.8l engine. What are the part numbers for the charcoal cannister and the pressure switching valve?

Go to Autozone com and search for "vapor canister." There are 2 possibilities, so you'll have to verify which is yours. I believe the valve is part of the canister and they come as an assembly. Check the pics on the site. This is not a cheap part. :\

Jun 12, 2015 | 2002 Toyota Corolla

1 Answer

Emissions cannister

Emission VSV for Pressure Switching Valve is located in the engine bay on the side of air filter box. It is connected with one vacuum pipe coming out of the intake manifold and the other pipe is connected to the Charcoal Canister. It also has a wiring connector the two wires which go to the ECM.

Jun 02, 2015 | 2002 Toyota Corolla

3 Answers

Runs good engine lt on code p0455

A loose gas cap or bad gas cap can cause this ,or filling gas tank while it running .or it could be a small leak in the evap system

Apr 21, 2014 | 2003 Jeep Wrangler

1 Answer

Malfunction indicator light jeep 2009 wrangler

I too have had the warning on the dash indicating: "GAS CAP". It is a generic code for anything to do with the fuel cap, filler hose, or overflow, including the charcoal cannister evaporative recovery system. Sometimes it is an easy fix, to simply replace the gas cap. If people consistently twist the cap past the point where it clicks, after closing = it can wear out the cap, and prevent a good seal. However, a large majority of people have overfilled their tank too many times and the evaporative cannister is full and the overflow line is clogged or kinked. Start with the cheap solution first, gas cap.
My problem started after running the extreme obstacle course at Daytona Beach Jeep Beach 2013 at which point I pulled the cannister off the bottom and had to replace it. There are no skid plates protecting it and it would be easy for sticks etc. to get jammed up in and around that cannister while even mildly off road. Crawl under and follow the filler hose down from the passenger rear of the vehicle. The charcoal cannister is approx the size of 2 loaves of bread and sits just forward of the axle, next to the drive shaft.
Good luck.

Mar 18, 2013 | 2009 Jeep Wrangler 3.8

3 Answers

I have a blinking check engine light and I have went to have the codes checked out and they show a bad gas cap but the car has a rough idle and I have just rebuilt the engine. the car sounds as though it...

Hi, if the trouble code was P0455, it could be a purge valve that has failed or jammed open. This can easily happen when the vapor cannister screen fails and allows charcoal into the purge line. The charcoalcan then block the closing of the purge valve and allow purge flow during idle. Remove the purge valve and see if it's open. If it's jammed, clean it out. If there is charcoal in it, replace the vapor cannister. If the valve just doesn't close due to a broken return spring, replace the valve.
If the valve is fine, turn your attention to the parts in the back of the car. Look for a busted hose on the cannister or a crack in the cannister, but this would not explain the idle issues. Please let me know if you have questions, and thanks for using FixYa.
purge valve:


EVAP system:


Mar 29, 2011 | 2000 Pontiac Firebird

1 Answer

Check engine code po446,also can only put gas in very slowly or gas will gush out of filler pipe.don't know if both are related.

yes, 446 is fuel EVAP system vent valve circuit malfunction. Check the connection to the vent valve. If connection is good, valve/solenoid may have failed. The vent valve is between the EVAP charcoal cannister and the engine along the vacuum line. If you can tell me your model and year, I may be able to give you more specific insrtuctions.

Nov 12, 2010 | Chevrolet Avalanche Cars & Trucks

1 Answer


P0446 = Evaporative Emission Control System Vent Control Circuit failure - the circuits that control the charcoal cannister are faulty or they are detecting a failure in the valves. Check the tank cap, the valves and the vacuum tubes to the cannister.

Aug 23, 2010 | 1998 Lexus ES 300

1 Answer

What is a purge valve on a 2000 mazda xl and where is it located?

When the car is off, gasoline vapors from the fuel tank are absorbed in a charcoal cannister. When the engine is running, vacuum from the intake is directed to the cannister through the purge valve to **** the fumes from the charcoal back into your engine. This keeps the fumes out of the atmosphere. The purge valve is a solenoid controlled by the ECU to open when it thinks the engine can take the extra air. There is a little pump that sucks on the system to check for leaks and it sets a CEL if there is one.

The purge valve is part of the EVAP emissions control. This is a common failure in Mazdas.

Hope helped.

Apr 09, 2010 | 2000 Mazda 626

2 Answers

2001 hyundai accent, trouble filling gas tank

I have 2002 Hyundai Accent. When fueling, I had to trickle the fuel in to prevent the fuel dispenser from constantly shutting off. Even then I could only get about a quarter gallon at a time between fuel shutoffs. Would take 10-15 minutes to put in 10 gallons. Very frustrating. I found and fixed the problem today. There is a charcoal cannister that is part of the Evaporative Emissions control system. It is located inside the rear fender well on the driver side, behind the driver side rear tire. You cant miss it. Actually looks like a square plastic box and it has hoses coming out of it. I removed the entire charcoal cannister assembly in about 15 minutes. Follow carefully. First, remove the electrical connector to the purge control valve (this valve assemby is mounted to the side of the charoal cannister on a bracket). No big deal. Then disconnect the three hoses that come out from the cannister assembly on the one side that faces the rear tire. Two of these hoses are small diameter about 1/4" and one is larger at about 5/8 inch diameter. Then you remove the 3 bolts that hold the whole cannister to the car frame. Then the whole piece comes out. Once I got the cannister and purge control valve out of the car as a whole assy I found the problem. The larger of the 3 hoses you disconnected as well as the port it connects to on the cannister was packed with the small charcoal pellets and actually formed a solid plug inside that larger hose. I had to stick a screw driver through that hose to knock the plug out that those charcoal pellets had formed. It all makes sense now. When you fill the tank with gas, you also push out air and vapor from the gas tank that is being displaced by the rising fuel in the tank. That vapor is supposed to go through that larger hose to the charcoal cannister where the fumes are removed by the charcoal. If that hose is plugged, like mine was, then the vapor has nowhere to go as you fill the tank and it increases pressure within the tank it causes the fuel dispenser nozzle to shutoff because it keeps detecting a pressure increase within the tank. That's my theory. I don't have the Hyundai design prints to confirm it. I had to tilt the charcoal dispenser so that the pellets came out of that larger hose port on the cannister. Like I said, even the port itself was full of pellets. So I poured out enough to clear the pellets that were in the hose port. I cleaned out the hose. Put everything back and went to go fill with gas. I filled that tank at full bore with no problem. Have the dealer or your mechanic check the ports and the hoses off the cannister. If they are filled with charcoal pellets, that is the problem. That should cost less than some of the fixes I have been reading about here.

Feb 16, 2010 | Hyundai Motor 2002 Sonata

1 Answer

Codes PO 442, 449 and 455

Check all vacuum lines from the gas tank to the evaporative charcoal cannister by the gas tank and to the purge valve located at the engine. Check the electrical connector at the vent solenoid which should be located on the charcoal cannister and purge valve solenoid by the intake manifold.

Jun 10, 2009 | 2003 Chevrolet Silverado 1500

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