The Complexities of Evap Canister Maintenance: A Closer Look at Toyota's Design

When it comes to car repairs, many drivers are familiar with the frustration of dealing with faulty evaporative emission control (EVAP) systems. One common issue that can arise is a clogged vent system, which can lead to trouble codes and costly repairs. In this article, we'll take a closer look at the EVAP canister and its maintenance requirements, particularly in the context of Toyota's design.

Getting to the Evap Canister: A Challenging Task

For many drivers, accessing the evap canister is a daunting task. The canister is typically located in a hard-to-reach area, such as under the rear wheel well or near the fuel tank. In the case of this particular Toyota model, we found that removing the left rear tire was a more practical approach. By doing so, we were able to gain access to the evap canister without having to drop the entire gas tank.

The Filter and Canister Connection: A Potential Weak Point

As we crawled under the car, we noticed that the filter for the system needed to be removed in order to access the canister. The filter is an important component of the EVAP system, as it helps to remove contaminants from the air stream before they enter the canister. We also saw that the canister connection was loose, which could have led to a range of problems if not addressed.

The Vent System: A Common Source of Trouble

One common issue that can arise in EVAP systems is clogged vents. These vents are designed to allow fuel vapors to escape from the tank and evaporate before they enter the engine. However, over time, debris such as dirt and spider webs can accumulate on the vents and block airflow. In this particular case, we found that the vents were clear of debris, but the hoses had come loose at one point. The hose in question was a critical component of the vent system, and its loss could have led to a range of problems.

The Problem with Toyotas: Cheaply Made Hoses

One common issue that affects Toyota owners is poorly made hoses that are prone to coming loose. These hoses are designed to carry fuel vapors from the tank to the canister, but they can be damaged by the constant flow of gasoline. In many cases, these hoses will eventually come apart or crack, leading to a range of problems including faulty evap systems and expensive repairs.

Resetting the System: A Simple yet Important Step

If you're working on an EVAP system and encounter a problem, it's essential to reset the system before attempting any repairs. This involves pushing the "reset" code button on the dashboard, which will erase the trouble codes from the computer's memory. It's also a good idea to take photos of the system before starting work, as this can help you identify potential problems and troubleshoot issues more effectively.

Conclusion: The Importance of Proper Maintenance

In conclusion, maintaining an EVAP system requires attention to detail and a willingness to tackle complex repairs. While Toyota's design has its advantages, such as being sealed in the back to prevent crud from entering, poorly made hoses can still cause significant problems. By following these tips and taking the time to properly maintain your EVAP system, you can avoid costly repairs and keep your car running smoothly for years to come.

The Importance of Checking Hoses

When working on an EVAP system, it's essential to check all hoses regularly. Even if they appear to be in good condition at first glance, they can still develop cracks or other damage over time. In fact, many cases of hose failure are caused by small cracks or weaknesses that go unnoticed until it's too late.

Replacing the Wrong Hoses

If you do find a damaged hose, replacing it with the wrong one can lead to a range of problems. Radiator hoses and vacuum hoses are not designed for use in EVAP systems, and they can cause serious damage if installed incorrectly. This is why it's essential to always purchase replacement hoses specifically designed for your car's make and model.

The Importance of Regular Maintenance

Regular maintenance is key to keeping your EVAP system running smoothly. This includes checking the system regularly for signs of leaks or damage, as well as performing routine repairs and maintenance tasks such as changing the air filter and replacing worn-out parts. By staying on top of these tasks, you can help prevent costly repairs down the road.

Common Issues with Chevy and Chrysler Systems

While Toyota's EVAP systems are generally reliable, other manufacturers have been known to experience issues with their own designs. Chevy owners may encounter problems with faulty vent valves, which can cause a range of symptoms including trouble codes and expensive repairs. Chrysler products also tend to have issues with evap canister assembly failures, which can be costly to repair or even require the entire unit to be replaced.

The Bottom Line: Be Prepared for Trouble

In conclusion, maintaining an EVAP system requires attention to detail and a willingness to tackle complex repairs. By following these tips and staying on top of routine maintenance tasks, you can help prevent costly repairs and keep your car running smoothly for years to come.

"WEBVTTKind: captionsLanguage: enas time goes on it costs more and more and more to get smaller and smaller gas increase here's a perfect example behind me it's about 23 miles a gallon in a city and 31 miles a gallon on a highway being a 1994 it's got a lot older technology it does have an overhead cam engine but it has normal fuel injectors not gdi it has no turbochargers and it's got a pretty simple four-speed automatic transmission now let's see what happens with this toyota matrix that is 13 years after the 2007. as you can see it's more complex it has variable valve timing it doesn't have a distributor it's got computer controlled ignition coils it's a much more sophisticated vehicle it has a mass airflow sensor with the old celica just had a map sensor these are more accurate and this thing gets about 30 miles a gallon in a city and 36 on a highway so it gets seven miles a gallon better gas mileage in town they both have 1.8 liter engines they both have automatic transmissions so in those years there was a reasonable amount of gas mileage increasing but you're going to find the more sophisticated the cars become the harder it is to get better gas mileage by using new technology take a 2019 toyota corolla with a 1.8 liter engine rated at a whopping one mile a gallon better than the 2007 matrix in a city one mile a gallon better at the highway and that was 12 years from 2007 to 2019 hardly anything got that much better so squeezing better gas mileage out of the later model cars is getting harder and harder and cost more and more money plus when you take into consideration the gigantic high level of technology more than a double-edged sword yes it costs tons more money to make and consequently it costs tons more money to fix when the things do break down newer cars breaking earlier than the old ones did you get gasoline direct injection thousand something psi pressure turbo charging ramming air into the engine strains the engine more smaller engines yeah they get better gas mods but they have to rev higher to go faster so they wear out faster basically you're paying more and more money for less and less increases in gas mileage for cars that are going to last as long wear out faster and in the in between cost a lot more money to repair basically you have lawyers politicians making laws about things they really don't understand themselves as i said these arguments could go on ad infinitum just go on forever because there's arguments on both sides as i say we live in the real world we have to deal with the consequences of this legislation understand that gas mileage can only go so far and then you're spending thousands and thousands of dollars for tiny little incremental increases doesn't go with the flow of our society people are popular suvs they love suvs they're all over the place well suvs get worse gas mileage they're big they're heavy they're not aerodynamic same thing with all-wheel drive in internal combustion engines of course it's less efficient you get worse gas mileage now strangely enough in electric cars it's kind of the opposite if you have motors on all four wheels they're actually more efficient and they use less electricity it's a completely different setup there but with gasoline or diesel-powered engines internal combustion engines if you go from two to four-wheel drive you lose quite a bit of efficiency there and you're gonna get worse gas mileage but people say oh i gotta have it i live in a snow or i like to control than that you can't have your cake and eat it too you can't have big giant family vehicles that everybody fits in and get great gas mileage in a vehicle that's going to last a long time a perfect example that is a chevy pickup truck they decided the other year to put a four cylinder engine in it of course the gas modules are higher but a big truck with a small four-cylinder engine guess what it's not going to hold up over time the hilarious thing is these ratings are all done on machines and stuff not in the real world you take that four cylinder pickup truck and you load it up and try pulling stuff gas mods is gonna go right down the toilet that's an empty vehicle on a dynamometer it has nothing to do with what the vehicle is actually used for in the real world in the real world you have to understand physics yeah physics what does that do with cars what is a lot to do with cars you're not going to be able to break the laws of physics you make a big heavy vehicle it's never going to get fantastic gas mileage you make a little tiny vehicle it's always going to ride kind of crappy compared to a big one because the smaller the wheelbase the more bumpy it's going to be that's just how things are you want a really fast car if you drive it really fast you're going to get crappy gas mileage i can drive a car and get 28 miles a gallon highway with a reasonable sized car like a crown vic i can also drive that same car like a maniac and get eight miles a gallon it's going to use more energy to get it going and the legislators can make all the laws in the world they want but if these laws don't follow the laws of physics guess what they're just going to be a joke people want to drive around in big giant suvs they're going to get bad gas mileage it doesn't matter going to be more inefficient even if they make electric ones if you had a smaller car that was electric it's going to use a lot less power you want a car that gets good gas mods get a smaller one that's just how it goes you know be fooled by this technology of oh i'll get a four cylinder engine in my big truck gasoline direct injection because guess what that baby's gonna fall apart before it's time if people want to change the whole base of transportation that's another story entirely but don't attempt to nitpick the internal combustion engine to death crazy rules by people don't even understand what's going on electronic emergency brake systems because if you don't know it modern cars don't have a pull up emergency brake or a step on emergency brake they have an electronic one and to turn it on you flip the switch that turns it on then when you turn it off what you do is you put it dry this is an electronic transmission then you push this forward the light goes off and it's now turned off oh please bring back the simpler days like my celica here's the emergency brake real simple on off and there's a cable that goes to the back now why oh why have they replaced a simple cable system that can last forever with electronic gizmo well you know why because they can and they can charge you a ton of money to fix it when the stupid things break because instead of having a simple cable assembly that pulls them they now use electric switch goes through a computer module in this case the computer module costs 697 dollars and they do go bad because of course fiat italian chrysler design which are notorious for having electrical problems anyway then they eventually go to two electric motors on the rear wheels that clamp them down i'll pull this wheel off and show you and we come down here here we can see there's the electric cable and there's a little motor that squeezes the brakes for the emergency and then it's supposed to release them and as you can see it's plastic there's one on this side and one on the other side and they're about 115 bucks apiece when they go bad and yes they do go bad being plastic electronic stuff that are soaked in water while you drive down the road all the time plus it makes it a bigger pain in the butt when you change the brake pads because your spiral you got a special tool to squeeze them and turn them at the same time i'll show you right now first you unbolt the caliper out comes the bulb as you can see the tool fits in here right in here so now when you turn this it also turns the caliper so it goes in you can't squeeze it in or you'll break the stupid thing you have to have this tool that both turns and pushes in at the same time and once you're done turning you can see it's pushed the piston in so now i can slide over the brake pads then you just turn this by hand to get it loose and it comes out of the hull take the rest of the tool off you can see it's stuck in there now now you can see it's got the three little holes where the three lines come here's the tool so you've got the three little pieces that fit in without that you'll destroy the motor and everything and it'll cost you a fortune so you got to have the tool and now that we put new pads in then with the new brake pads on you slide the caliper on get the bolt and bolt it back in place now get it super tight and you'll notice i have locking pliers here that's because these are so cheaply made the little nut you can see the one on the top here it spins free if you try to put it tight so you got to tighten it with this and when you pull on this it stays in place and locks at least that's when you're done off it goes here we go the emergency brake is off spins now let's put it on here make a noise and as you can see now i can't turn it it's locked on now we'll release it to make sure it releases and now it's released now as you can see these electronic parking brakes they made a very simple cable system turn into a complex monstrosity 670 dollars for the module 112 bucks a piece for the motors then there's wiring in between and the switch there's a lot of expensive crap that can go wrong to me this is just engineers playing around so they can control things with electronics instead of physical it's going to cost you more in the long run there's no arguing now being a sealed electronic system there's no maintenance involved i mean you want to hope they have the sealed for water good because it's going to go through water in the back of the car driving through mud and snow and whatever it's going to get all over here so you better hope that they sealed these things really well when they built them no other than staying away from deep water or salt water in the ocean that can corrode all the stuff there's no maintenance on these things because they're 100 electronic but being electronic hey everybody knows electronic stuff breaks eventually and especially something like that it's got to be a pretty strong electric motor in order to hold the thing in place so you know at some point in time these things are going to burn out and burn out they do so now you know how electronic emergency brake systems work and why they might not be such a hot deal because after all if you've got an emergency brake that you step on or that you pull if you've got an emergency situation to stop you can control it somewhat with this thing it's electronic your ability to control the range of hard brakes isn't all that great now for parking yeah you're sitting you're parking it's there but for an actual emergency you can give me the all hand ones or the foot ones like in my wife's lexus and a lot of american cars have the foot ones you get a lot better control in emergency situation than some stupid little button that you pull and hope that it does its job so if you ask me in this case technology is taking a giant leap backwards give me the old cable or the old step on emergency brake where you have a better control and emergency situation than flipping some stupid little switch and praying that the motor does its thing fast enough and at an even enough degree that it stops straight now i'll show you how the evap system works we'll open the hood to keep gasoline vapors from polluting the atmosphere and evaporating like it did when i was young they now have evap systems big old hose goes to the system comes up through here and then it will burn the gases at some times since gasoline vapor is hydrocarbon it can be burned it'll burn through the engine or if you're just refueling your tank or it's just sitting there in the hot sun the vapors go through the system through the evap canister that has charcoal and stuff that filters out the hydrocarbons and then pure air at least what they call pure air comes out of the vent and it doesn't pollute the atmosphere because the hydrocarbons is gone now when you get this p0446 code that means there's something wrong with the vetting system well you really want to start with that code yes at the evap canister itself now in all cars like mycelica they're easy to get to you just open the hood in this case there it is right here here it is the modern cars not so simple now some cars even got to drop the gas tank to get to the evap canister horrible design in the case of this matrix we just have to take the left rear tire off it's a heck of a lot easier than dropping a whole gas tank now when we get under here we can see there it is not hard to get to now this here is the filter for the system this goes back to the front of the car and this comes off of the actual canister which is under further now since we're crawling in here we got a big mat and a big steel jack stand so it doesn't fall on our head now when we go under here we can see the whole setup the giant evap canister and there's a problem here what often happens is the vents can get clogged up with crud now in this case all the hoses are on there's nothing clogged up so we're going to follow the vent the whole way to the front of the car because toyota has a better vent system a lot of others they'll have actual vents down there spiders can get in there because they're attracted to gasoline papers for some unknown reason does something to their sensory inputs but tight events in the front so we're going to take the stop off get it out of the way we follow the vent system there we can see the stupid hose came off a lot of times when people are working they'll knock these goofy little hoses you can see this part's ripped that's just insulation what you want to do is peel back the insulation squeeze the clamp the problem is that rubs on it that's what made it go bad so we'll hold that back then squeeze this on now it's nice and tight and this thing you can see rubbing on it that caused the problem i got this on a little tighter this should have been made a little bit longer but at least it hasn't worn a hole in it yet now these evap systems are continually checking themselves as you drive and when they find a leak they trip a coat that there's a problem in the system thank goodness it wasn't a broken evap canister because on these babies that big old thing is 375 they're not giving it away but you can see with toyota it's a better design it's sealed in the back so crud doesn't get enough you have some american cars all the crud from the tires gets there and then it jams into the vents and plugs them up or worse gets on electronics that isn't sealed that well then the electronic short out these toyota systems are much more bulletproof as you can see the only problem with this is the hose had come off i see that all the time on these sometimes it's back here where the hose comes off somebody takes the air filter off then the hoses come disconnected so if you're ever working on one check all the hoses and even better see everything's working fine before you work on it get your camera take a picture of everything and then if something goes wrong look at your picture and compare it to what the car looks like now you or someone else knocked off a hose somewhere that's what normally happens to toyotas the systems themselves don't usually break but through human error hoses get knocked off or if they're really old like my 94 celica the rubber hoses just flat rock find them and see which ones are rotten and have fallen off or sometimes they completely collapse because realize you have gasoline vapor going through these rubber hoses and eventually that will decompose them and when you do replace them replace them with special hoses that are made to take gasoline vapors not any kind of a radiator hose or a naked vacuum hose that just has air suction these things have gasoline vapors and they have to have special hoses or they will come apart and of course if you fix it yourself then you want to reset it you just push the race code just yes then it erases the codes and you can take it for a ride that's the problem the code won't come back so realize even though these evap systems are controlled by computers often it's simple mechanical things that go wrong either crud gets in the vent and plugs it up if you got a low down one or in this case toyota's hoses accidentally get pulled off with the toyotas it's not common anything goes wrong with them any electronics now let's say you're working on a chevy well the evap canister vent valves go bad a lot in those even more so on to chrysler products they're just cheaply made and evap canister has electronic vent valves and they just break and then you got to replace the vent valve and unfortunately in many of the cases you got to buy the entire evap canister assembly because it only comes as one piece so they rip you off when it does break so if you never want to miss another one of my new car repair videos remember to ring that bell youas time goes on it costs more and more and more to get smaller and smaller gas increase here's a perfect example behind me it's about 23 miles a gallon in a city and 31 miles a gallon on a highway being a 1994 it's got a lot older technology it does have an overhead cam engine but it has normal fuel injectors not gdi it has no turbochargers and it's got a pretty simple four-speed automatic transmission now let's see what happens with this toyota matrix that is 13 years after the 2007. as you can see it's more complex it has variable valve timing it doesn't have a distributor it's got computer controlled ignition coils it's a much more sophisticated vehicle it has a mass airflow sensor with the old celica just had a map sensor these are more accurate and this thing gets about 30 miles a gallon in a city and 36 on a highway so it gets seven miles a gallon better gas mileage in town they both have 1.8 liter engines they both have automatic transmissions so in those years there was a reasonable amount of gas mileage increasing but you're going to find the more sophisticated the cars become the harder it is to get better gas mileage by using new technology take a 2019 toyota corolla with a 1.8 liter engine rated at a whopping one mile a gallon better than the 2007 matrix in a city one mile a gallon better at the highway and that was 12 years from 2007 to 2019 hardly anything got that much better so squeezing better gas mileage out of the later model cars is getting harder and harder and cost more and more money plus when you take into consideration the gigantic high level of technology more than a double-edged sword yes it costs tons more money to make and consequently it costs tons more money to fix when the things do break down newer cars breaking earlier than the old ones did you get gasoline direct injection thousand something psi pressure turbo charging ramming air into the engine strains the engine more smaller engines yeah they get better gas mods but they have to rev higher to go faster so they wear out faster basically you're paying more and more money for less and less increases in gas mileage for cars that are going to last as long wear out faster and in the in between cost a lot more money to repair basically you have lawyers politicians making laws about things they really don't understand themselves as i said these arguments could go on ad infinitum just go on forever because there's arguments on both sides as i say we live in the real world we have to deal with the consequences of this legislation understand that gas mileage can only go so far and then you're spending thousands and thousands of dollars for tiny little incremental increases doesn't go with the flow of our society people are popular suvs they love suvs they're all over the place well suvs get worse gas mileage they're big they're heavy they're not aerodynamic same thing with all-wheel drive in internal combustion engines of course it's less efficient you get worse gas mileage now strangely enough in electric cars it's kind of the opposite if you have motors on all four wheels they're actually more efficient and they use less electricity it's a completely different setup there but with gasoline or diesel-powered engines internal combustion engines if you go from two to four-wheel drive you lose quite a bit of efficiency there and you're gonna get worse gas mileage but people say oh i gotta have it i live in a snow or i like to control than that you can't have your cake and eat it too you can't have big giant family vehicles that everybody fits in and get great gas mileage in a vehicle that's going to last a long time a perfect example that is a chevy pickup truck they decided the other year to put a four cylinder engine in it of course the gas modules are higher but a big truck with a small four-cylinder engine guess what it's not going to hold up over time the hilarious thing is these ratings are all done on machines and stuff not in the real world you take that four cylinder pickup truck and you load it up and try pulling stuff gas mods is gonna go right down the toilet that's an empty vehicle on a dynamometer it has nothing to do with what the vehicle is actually used for in the real world in the real world you have to understand physics yeah physics what does that do with cars what is a lot to do with cars you're not going to be able to break the laws of physics you make a big heavy vehicle it's never going to get fantastic gas mileage you make a little tiny vehicle it's always going to ride kind of crappy compared to a big one because the smaller the wheelbase the more bumpy it's going to be that's just how things are you want a really fast car if you drive it really fast you're going to get crappy gas mileage i can drive a car and get 28 miles a gallon highway with a reasonable sized car like a crown vic i can also drive that same car like a maniac and get eight miles a gallon it's going to use more energy to get it going and the legislators can make all the laws in the world they want but if these laws don't follow the laws of physics guess what they're just going to be a joke people want to drive around in big giant suvs they're going to get bad gas mileage it doesn't matter going to be more inefficient even if they make electric ones if you had a smaller car that was electric it's going to use a lot less power you want a car that gets good gas mods get a smaller one that's just how it goes you know be fooled by this technology of oh i'll get a four cylinder engine in my big truck gasoline direct injection because guess what that baby's gonna fall apart before it's time if people want to change the whole base of transportation that's another story entirely but don't attempt to nitpick the internal combustion engine to death crazy rules by people don't even understand what's going on electronic emergency brake systems because if you don't know it modern cars don't have a pull up emergency brake or a step on emergency brake they have an electronic one and to turn it on you flip the switch that turns it on then when you turn it off what you do is you put it dry this is an electronic transmission then you push this forward the light goes off and it's now turned off oh please bring back the simpler days like my celica here's the emergency brake real simple on off and there's a cable that goes to the back now why oh why have they replaced a simple cable system that can last forever with electronic gizmo well you know why because they can and they can charge you a ton of money to fix it when the stupid things break because instead of having a simple cable assembly that pulls them they now use electric switch goes through a computer module in this case the computer module costs 697 dollars and they do go bad because of course fiat italian chrysler design which are notorious for having electrical problems anyway then they eventually go to two electric motors on the rear wheels that clamp them down i'll pull this wheel off and show you and we come down here here we can see there's the electric cable and there's a little motor that squeezes the brakes for the emergency and then it's supposed to release them and as you can see it's plastic there's one on this side and one on the other side and they're about 115 bucks apiece when they go bad and yes they do go bad being plastic electronic stuff that are soaked in water while you drive down the road all the time plus it makes it a bigger pain in the butt when you change the brake pads because your spiral you got a special tool to squeeze them and turn them at the same time i'll show you right now first you unbolt the caliper out comes the bulb as you can see the tool fits in here right in here so now when you turn this it also turns the caliper so it goes in you can't squeeze it in or you'll break the stupid thing you have to have this tool that both turns and pushes in at the same time and once you're done turning you can see it's pushed the piston in so now i can slide over the brake pads then you just turn this by hand to get it loose and it comes out of the hull take the rest of the tool off you can see it's stuck in there now now you can see it's got the three little holes where the three lines come here's the tool so you've got the three little pieces that fit in without that you'll destroy the motor and everything and it'll cost you a fortune so you got to have the tool and now that we put new pads in then with the new brake pads on you slide the caliper on get the bolt and bolt it back in place now get it super tight and you'll notice i have locking pliers here that's because these are so cheaply made the little nut you can see the one on the top here it spins free if you try to put it tight so you got to tighten it with this and when you pull on this it stays in place and locks at least that's when you're done off it goes here we go the emergency brake is off spins now let's put it on here make a noise and as you can see now i can't turn it it's locked on now we'll release it to make sure it releases and now it's released now as you can see these electronic parking brakes they made a very simple cable system turn into a complex monstrosity 670 dollars for the module 112 bucks a piece for the motors then there's wiring in between and the switch there's a lot of expensive crap that can go wrong to me this is just engineers playing around so they can control things with electronics instead of physical it's going to cost you more in the long run there's no arguing now being a sealed electronic system there's no maintenance involved i mean you want to hope they have the sealed for water good because it's going to go through water in the back of the car driving through mud and snow and whatever it's going to get all over here so you better hope that they sealed these things really well when they built them no other than staying away from deep water or salt water in the ocean that can corrode all the stuff there's no maintenance on these things because they're 100 electronic but being electronic hey everybody knows electronic stuff breaks eventually and especially something like that it's got to be a pretty strong electric motor in order to hold the thing in place so you know at some point in time these things are going to burn out and burn out they do so now you know how electronic emergency brake systems work and why they might not be such a hot deal because after all if you've got an emergency brake that you step on or that you pull if you've got an emergency situation to stop you can control it somewhat with this thing it's electronic your ability to control the range of hard brakes isn't all that great now for parking yeah you're sitting you're parking it's there but for an actual emergency you can give me the all hand ones or the foot ones like in my wife's lexus and a lot of american cars have the foot ones you get a lot better control in emergency situation than some stupid little button that you pull and hope that it does its job so if you ask me in this case technology is taking a giant leap backwards give me the old cable or the old step on emergency brake where you have a better control and emergency situation than flipping some stupid little switch and praying that the motor does its thing fast enough and at an even enough degree that it stops straight now i'll show you how the evap system works we'll open the hood to keep gasoline vapors from polluting the atmosphere and evaporating like it did when i was young they now have evap systems big old hose goes to the system comes up through here and then it will burn the gases at some times since gasoline vapor is hydrocarbon it can be burned it'll burn through the engine or if you're just refueling your tank or it's just sitting there in the hot sun the vapors go through the system through the evap canister that has charcoal and stuff that filters out the hydrocarbons and then pure air at least what they call pure air comes out of the vent and it doesn't pollute the atmosphere because the hydrocarbons is gone now when you get this p0446 code that means there's something wrong with the vetting system well you really want to start with that code yes at the evap canister itself now in all cars like mycelica they're easy to get to you just open the hood in this case there it is right here here it is the modern cars not so simple now some cars even got to drop the gas tank to get to the evap canister horrible design in the case of this matrix we just have to take the left rear tire off it's a heck of a lot easier than dropping a whole gas tank now when we get under here we can see there it is not hard to get to now this here is the filter for the system this goes back to the front of the car and this comes off of the actual canister which is under further now since we're crawling in here we got a big mat and a big steel jack stand so it doesn't fall on our head now when we go under here we can see the whole setup the giant evap canister and there's a problem here what often happens is the vents can get clogged up with crud now in this case all the hoses are on there's nothing clogged up so we're going to follow the vent the whole way to the front of the car because toyota has a better vent system a lot of others they'll have actual vents down there spiders can get in there because they're attracted to gasoline papers for some unknown reason does something to their sensory inputs but tight events in the front so we're going to take the stop off get it out of the way we follow the vent system there we can see the stupid hose came off a lot of times when people are working they'll knock these goofy little hoses you can see this part's ripped that's just insulation what you want to do is peel back the insulation squeeze the clamp the problem is that rubs on it that's what made it go bad so we'll hold that back then squeeze this on now it's nice and tight and this thing you can see rubbing on it that caused the problem i got this on a little tighter this should have been made a little bit longer but at least it hasn't worn a hole in it yet now these evap systems are continually checking themselves as you drive and when they find a leak they trip a coat that there's a problem in the system thank goodness it wasn't a broken evap canister because on these babies that big old thing is 375 they're not giving it away but you can see with toyota it's a better design it's sealed in the back so crud doesn't get enough you have some american cars all the crud from the tires gets there and then it jams into the vents and plugs them up or worse gets on electronics that isn't sealed that well then the electronic short out these toyota systems are much more bulletproof as you can see the only problem with this is the hose had come off i see that all the time on these sometimes it's back here where the hose comes off somebody takes the air filter off then the hoses come disconnected so if you're ever working on one check all the hoses and even better see everything's working fine before you work on it get your camera take a picture of everything and then if something goes wrong look at your picture and compare it to what the car looks like now you or someone else knocked off a hose somewhere that's what normally happens to toyotas the systems themselves don't usually break but through human error hoses get knocked off or if they're really old like my 94 celica the rubber hoses just flat rock find them and see which ones are rotten and have fallen off or sometimes they completely collapse because realize you have gasoline vapor going through these rubber hoses and eventually that will decompose them and when you do replace them replace them with special hoses that are made to take gasoline vapors not any kind of a radiator hose or a naked vacuum hose that just has air suction these things have gasoline vapors and they have to have special hoses or they will come apart and of course if you fix it yourself then you want to reset it you just push the race code just yes then it erases the codes and you can take it for a ride that's the problem the code won't come back so realize even though these evap systems are controlled by computers often it's simple mechanical things that go wrong either crud gets in the vent and plugs it up if you got a low down one or in this case toyota's hoses accidentally get pulled off with the toyotas it's not common anything goes wrong with them any electronics now let's say you're working on a chevy well the evap canister vent valves go bad a lot in those even more so on to chrysler products they're just cheaply made and evap canister has electronic vent valves and they just break and then you got to replace the vent valve and unfortunately in many of the cases you got to buy the entire evap canister assembly because it only comes as one piece so they rip you off when it does break so if you never want to miss another one of my new car repair videos remember to ring that bell you\n"