MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Garth on February 19, 2010, 03:19:13 pm

Title: What is the EVAP Emission Control System?
Post by: Garth on February 19, 2010, 03:19:13 pm
Following on from my boost leak thread, I think I have identified the boost leak as a failed diverter valve. I now have a new valve to replace the old one, which should clear one fault.

The other fault code I have is this one:
001089 - EVAP Emission Control Sys: Incorrect Flow
               P0441 - 002 - Lower Limit Exceeded - MIL ON
             Freeze Frame:
                    Fault Status: 11100010
                    Fault Priority: 0
                    Fault Frequency: 15
                    Mileage: 101064 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 13:39:07

             Freeze Frame:
                    RPM: 827 /min
                    Load: 21.6 %
                    Speed: 0.0 km/h
                    Temperature: 72.0°C
                    Temperature: 12.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 14.224 V

Ross-tech explain it here:
http://wiki.ross-tech.com/index.php/16825/P0441/001089 (http://wiki.ross-tech.com/index.php/16825/P0441/001089)

But what is this system and where do I start looking?

Could this be caused by the boost leak from faulty diverter valve? This error I have had for a while but the boost leak is a recent one.

I don't really know where to start with this one.

Bring back the good old days. I remember rebuilding my sisters Punto engine after the cylinder head went and I pulled out every single component from the head and completely rebuilt it, re-grinding the valves and everything. I miss those days.... It's all bloody electronics now  :sad1:
Title: Re: What is the EVAP Emission Control System?
Post by: RedRobin on February 19, 2010, 04:09:41 pm
I'm not familiar with all the Ross/VCDS codes etc but can tell you that a failed DV (Diverter Valve) would create a boost leak. The earlier GTI's were quite prone to ripping the plastic diaphram on the oem DV if the car was tuned. A very random fault but lost of cases.

VW/VAG revised the DV lost of times and although mine didn't rip I got a Forge DV as a precautionary measure.

I understand that the current VAG DV is up to the job but someone else will have to confirm this.
Title: Re: What is the EVAP Emission Control System?
Post by: Garth on February 19, 2010, 04:23:11 pm
Thanks for teh replay mate, but I have actually already established that part  :wink:

I have a new dv to replace the old one as the is what is causing the boost leak. Its the other fault (that is longer running) that I now need to solve  :happy2:
Title: Re: What is the EVAP Emission Control System?
Post by: danishmkvgti on February 19, 2010, 04:54:57 pm
i think you need to check your PCV diaphram situated on the camcover, a good replacement is the BSH pcv fix W/O catch can,  :happy2:
Title: Re: What is the EVAP Emission Control System?
Post by: danishmkvgti on February 19, 2010, 04:57:00 pm
I'm not familiar with all the Ross/VCDS codes etc but can tell you that a failed DV (Diverter Valve) would create a boost leak. The earlier GTI's were quite prone to ripping the plastic diaphram on the oem DV if the car was tuned. A very random fault but lost of cases.

VW/VAG revised the DV lost of times and although mine didn't rip I got a Forge DV as a precautionary measure.

I understand that the current VAG DV is up to the job but someone else will have to confirm this.

rubber, not plastic, ever heard of a plastic condom??  :P  :jumping:  :star:
Title: Re: What is the EVAP Emission Control System?
Post by: Garth on February 19, 2010, 05:24:42 pm
i think you need to check your PCV diaphram situated on the camcover, a good replacement is the BSH pcv fix W/O catch can,  :happy2:
Thanks mate, I'll take a look in the morning
Title: Re: What is the EVAP Emission Control System?
Post by: vRS Carl on February 19, 2010, 05:51:02 pm
That fault is nothing to do with the DV or the PCV

I have had it a couple of times (including with the BSH catch can)

It is a random fault and according to Skoda it's to do with the Charcoal canister.

IIRC they wanted some stupid amount to replace the canister and i said ram it as the car drives normally and it's not a constant fault.

If you are getting it permanently i would take it VW and get them to tell you exactly what it is that is wrong.

Carl :happy2:
Title: Re: What is the EVAP Emission Control System?
Post by: 182_blue on February 19, 2010, 06:10:04 pm
I have had this randomly and it clears usually, i have seen it on two other cars also, non of these have any problems with power etc etc, so i would be tempted to leave it, if you must do it then its a canister change along with some of the pipework and a small valve iirc
Title: Re: What is the EVAP Emission Control System?
Post by: RedRobin on February 19, 2010, 06:16:06 pm

rubber, not plastic, ever heard of a plastic condom??  :P  :jumping:  :star:


....Plastic = a synthetic material made from a wide range of organic polymers which can be moulded into shape while soft and then set into either a rigid or slightly elastic form.
Title: Re: What is the EVAP Emission Control System?
Post by: danishmkvgti on February 19, 2010, 06:32:46 pm

rubber, not plastic, ever heard of a plastic condom??  :P  :jumping:  :star:


....Plastic = a synthetic material made from a wide range of organic polymers which can be moulded into shape while soft and then set into either a rigid or slightly elastic form.

I know  :smiley:, but it is made of rubber, i have one right here in front of me. Sorry RR, it wasn't meant in any other way than just a little laugh.
And i stand corrected regarding the reason for this error code  :notworthy:
Title: Re: What is the EVAP Emission Control System?
Post by: RedRobin on February 19, 2010, 06:50:56 pm
^^^^
No problem, Danish  :drinking:  :laugh:

Why do you have one right in front of you? You're not thinking of using it as a contraceptive are you?  :evilgrin:
Title: Re: What is the EVAP Emission Control System?
Post by: Garth on February 19, 2010, 06:58:25 pm
If you are getting it permanently i would take it VW and get them to tell you exactly what it is that is wrong.

Carl :happy2:
Already tried that and VW just cleared it and sent me on my way. The car drives fine with the light on, but I don't like looking at the light!!
I have had this randomly and it clears usually, i have seen it on two other cars also, non of these have any problems with power etc etc, so i would be tempted to leave it, if you must do it then its a canister change along with some of the pipework and a small valve iirc
Same here. Thanks for the suggestion, I will probebly pull the canister and associated pipework to make sure it's all clear when I replace the dv tomorrow.
 :drinking:
Title: Re: What is the EVAP Emission Control System?
Post by: danishmkvgti on February 19, 2010, 07:00:02 pm
^^^^
No problem, Danish  :drinking:  :laugh:

Why do you have one right in front of you? You're not thinking of using it as a contraceptive are you?  :evilgrin:

The missus might find it stimulating, about double the size of what she's used to  :grin:
Title: Re: What is the EVAP Emission Control System?
Post by: xxx_mojo_xxx on February 19, 2010, 08:16:35 pm
oh dear...  :popcornsoda:
Title: Re: What is the EVAP Emission Control System?
Post by: micky 32 on February 19, 2010, 11:05:45 pm
Mater does the fault put the engine light on? I know on the american tfsi's if the petrol cap is loose or faulty it can create that fault with a light though.
Title: Re: What is the EVAP Emission Control System?
Post by: vRS Carl on February 19, 2010, 11:17:19 pm
Mater does the fault put the engine light on? I know on the american tfsi's if the petrol cap is loose or faulty it can create that fault with a light though.

No mate. I've only seen it about 4 times in the 3 years i've had the car.

If it becomes more frequent i will get the Charcoal Canister replaced


Carl :happy2:
Title: Re: What is the EVAP Emission Control System?
Post by: xxx_mojo_xxx on May 27, 2010, 08:15:18 pm
Where's this "Charcoal Canister"?
Title: Re: What is the EVAP Emission Control System?
Post by: RedRobin on May 27, 2010, 08:21:08 pm
Where's this "Charcoal Canister"?

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2FRedRobin_05%2FMods%2FCharcoalCan_top.jpg&hash=c4c963dc28d0fdd268e420cfad496567e739a3ba)

^ The square box in front of the screenwash filler.
Title: Re: What is the EVAP Emission Control System?
Post by: xxx_mojo_xxx on May 27, 2010, 08:28:46 pm
Cheers RR - what does this thing do?  Is it something that needs to be replaced/serviced after a certain number of miles?

I must admit I have never seen it in my car.
Title: Re: What is the EVAP Emission Control System?
Post by: RedRobin on May 27, 2010, 08:32:55 pm
^^^^
I hope you have seen it! You won't get through UK MOT without it.

It filters fuel vapours I think. They don't need to have them in the U S of A.
Title: Re: What is the EVAP Emission Control System?
Post by: vRS Carl on May 27, 2010, 08:42:01 pm
If you are getting the EVAP fault then check this hasn't happened.

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fww275%2FTaufe%2F1695663c.jpg&hash=dcc9e709e623d612b2ffcce2fb882c98d64c1ba5)

This is why I was getting it and since fixing that it hasn't been back touch wood.
Title: Re: What is the EVAP Emission Control System?
Post by: 56OctyVRS on December 31, 2011, 11:42:15 am
A friend of mine had one on his car go and it killed his mpg and the engine ran really rough. Since replacing it his engine is back to normal. I think he paid about £80 or there abouts for a new cannister.
Title: Re: What is the EVAP Emission Control System?
Post by: vRS Carl on December 31, 2011, 10:04:01 pm
Check the breather pipe first as that is about £9 to replace. A charcoal canister is about £95
Title: Re: What is the EVAP Emission Control System?
Post by: andrewparker on December 31, 2011, 10:40:38 pm
I personally don't think it will have any effect. I had to have mine changed and didn't notice any difference in MPG when it was faulty.
Title: Re: What is the EVAP Emission Control System?
Post by: vRS Carl on December 31, 2011, 11:19:04 pm
I never noticed any difference with MPG either when I replaced the pipe.
Title: Re: What is the EVAP Emission Control System?
Post by: martziniuk on January 01, 2012, 10:49:59 am
I never noticed any poor running or mpg change when I had the evap fault code but the canister did fix the code. A bad PCV seems to cause a lot of running problems.