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The other day i was trying to fix the tiny vacuum hose from the charcoal cannister and i accidently pulled it out from whever it was attached to behind the carwall

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One goes to the fuel tank.
Another goes to the inlet manifold.
The third is usually a short vent tube.

Posted on Apr 04, 2015

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Posted on Jan 02, 2017

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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

1 Answer

I have a code p0456


P0456 indicates you have a slight leak in the Evap system. I would start by checking the charcoal cannister, duty cycle purge solenoid, and related vacuum hoses.

Jun 19, 2011 | 2001 Chrysler Voyager

1 Answer

2003 hyundai accent 1.6L is slow to fuel up. Then the check engine light comes on. The code reads evaporative emmision control small leak. Apparently this is common with this car.


The vapor tube is plugged with charcoal pellets from the cannister it is connected to. There are 2 clips you simply pinch on to release. Careful when you pull off the hose they will come out quickly. Crawl under the car just behind left rear wheel you will see a black box and on the right side is a small hose that is the vapor tube. I just emptied mine of all the charcoal pellets and it fills properly. I also put a small screen at the end of the hose as it goes into the box to prevent more debris from getting in. Please do not pay big bucks to fix this it is simple to remedy.

Mar 06, 2011 | 2002 Hyundai Accent

1 Answer

Where does the vacum hose under the batt go looks like it come's out of the top of the canister then not sure where it hooks up to


If you're talking about the charcoal cannister, that's probably the vent hose that let's air in during purge. It does not attach--it's just open on the end. Are there 2 other hoses on the cannister--one from the fuel tank and one that goes to the intake manifold? If yes, then you're good.

Dec 27, 2010 | 2000 Ford Contour

1 Answer

97 nissan pickup, idles rough charcoal in purge


you answered your own question if the charcoal cannister is compromised it will also act as a vacuum leak

Jul 18, 2010 | 1996 Nissan Pickup

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

1 Answer

Ford focus, 2000 zx3 code p0455


your engine code means "big leak" in the evap control system, this system has alot of pieces, but you are looking for a vacuum leak most probably, look at your vacuum hoses, and refer to the vacuum diagram stuck under your hood for routing, see if you have a bad hose, or disconnected hose some where. these are small vacuum hoses that attach to the purge valve, air filter housing, and charcoal cannister. let me know what you find.

Apr 13, 2009 | 2003 Ford Focus

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