P0441 EVAP Emission Control System Purge Flow Fault

[Lukeforster_]

I've scowered the web for a fix but cant seem to find one.

Had the garage look at it, changed purge valve twice, no leaks in carbon canister, all vac lines in tact and seem to be fine. Literally no idea what it could be the garage think it could be electrical but I dont want to take it back to pay for something which doesn't fix it.

Any ideas anyone please?

 

[RUM4MO]

Does a leaking sealing washer on the fuel cap affect this - it does seem to on some other marques of cars?

 

[Lukeforster_]

I’ve checked the gas cap it was the first thing I did, no signs of damage and cleaned witg Ed-40.
Yesterday I did about 40 miles in the car and came to fill up and pressurised air came out the tank when undoing the cap, so this must be sealed but why is air coming out.

 

[RUM4MO]

Is it not air coming in that you are hearing, if the Evap system is working, you should have a very slight vac in the tank, certainly not any pressure I think.

 

[RUM4MO]

Just a thought, there is a "roll over" valve that stops fuel escaping from an inverted etc car, also it or elsewhere there must be a sort of "one way valve" that can be defeated by the induction vacuum when the EVAP valve is being pulsed, otherwise the system would not be able to purge the carbon cannister of fumes, maybe check that/these part/parts as they maybe one and the same item, you should be able to suck air into the purge circuit only.

 

[Lukeforster_]

Revisiting this thread as I still get the code come on and off.

It’s a 2014 Ibiza I tech 1.2 TSI. Changed the purge valve which doesn’t pass when no power is sent to it, the engine side hose sucks a hard vacuum. I have bought a charcoal canister but can’t find any information on where it is / how easy the fix is.

I initially thought it was in the engine bay coming off the purge valve but the lines just lead underneath the car.

Any information is greatly appreciated.

 

[RUM4MO]

I have never, yet, needed to look into this, but I think that the charcoal canister is way back at the tank filler area - which is probably why it can suffer from getting filled with liquid petrol when the car is repeatedly filled to beyond the first or second "click" stop.

 

[Lukeforster_]

I have never, yet, needed to look into this, but I think that the charcoal canister is way back at the tank filler area - which is probably why it can suffer from getting filled with liquid petrol when the car is repeatedly filled to beyond the first or second "click" stop.

I really appreciate you coming back here!

I am also pretty sure it is behind the wheel arch on the driver side rear wheel.

To update you, I blew really hard into the fuel tank side of the evap like which connects to the purge valve. It was like blowing through a straw. I then got a bike pump and tried my best to pump air down that line to try and clear any charcoal which could have been blocking/restricting the line. I did this on Friday and wiped the code straight after.

So far, I’ve done 50 miles and it hasn’t returned. I’ll keep you posted. I will still change the charcoal canister though. I’m hoping it’s a pretty straight forward job.

 

[Lukeforster_]

This is the line in I’m talking about which I was blowing into to clear. It connects to the purge valve on the non engine side. It leads to a white plastic connection which then just disappears down underneath the car.

The engine side purge valve line pulls a solid vacuum. I have attached an imagine of where that hose leads too you can see the white quick release and I’m going to guess it leads to the charcoal canister and fuel tank.

 

[RUM4MO]

Ah, a good view of the typical VW Group poly bag with air in it!