MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Lewis0292 on July 21, 2018, 03:05:29 pm

Title: Fault code po441
Post by: Lewis0292 on July 21, 2018, 03:05:29 pm

Hi I just purchased a ed30 last week and has been running fine until yesterday ... started revving to neally 2000rpm at idle so plugged it in and getting fault code po441 (incorrect purge flow) would this cause it to be revving itself as I’ve read that it could be n80 valve or charcoal canister ?? Thanks


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Title: Re: Fault code po441
Post by: Leco_GTI on July 21, 2018, 06:25:55 pm

I have the same problem since I bought the car almost 2 years ago. Replaced the N80 valve but it didn't resolve the problem. I didn't bother replacing the canister since the car runs fine and it doesn't cause any harm running the car with this "problem".

Title: Re: Fault code po441
Post by: Dave J on July 21, 2018, 07:18:59 pm

Mines never done that, but it used to throw up the P0441 code every so often and an occasional EML. It used to go away with no issues, and from the info on here it was down to the charcoal cannister & brimming the tank with fuel. I replaced my cannister and the N80 valve and it has been perfect ever since. I've read that others solved the problem by not filling the tank to the top.

Title: Re: Fault code po441
Post by: Lewis0292 on July 21, 2018, 07:23:48 pm

Cheers guys will just have to get to the bottom of it revving at idle now


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Title: Re: Fault code po441
Post by: Rossimac on July 22, 2018, 09:13:51 am

Same as above.

Tank was about £90 from VW. I think others have gotten much cheaper Chinese clones from eBay that do the same job. Up to you.

Title: Re: Fault code po441
Post by: muff1991 on July 28, 2018, 11:51:37 am

Doesn’t the coolant temperature sensor play a part with idle revs rising etc?

Title: Re: Fault code po441
Post by: pudding on July 28, 2018, 06:03:10 pm

The high revs sounds like an air leak to me.  Maybe the N80 valve is stuck open and the other end of the tube is open to air.

The easiest way to check your evap circuit is working correctly is to listen for a 'whoosh' pressure relief noise when unscrewing the petrol cap, when the tank is nearly empty.

If you don't get that noise, the evap circuit has a leak to atmosphere somewhere, or the N80 valve is stuck open.  Quite common. 

Brimming the fuel tank is not an issue with a nicely sealed evap circuit, that's a myth.

Fixing it once and for all does usually entail a new N80 and a new carbon can in a lot of cases.   The carbon can breaks down over time and little charcoal pellets can get sucked into the N80 valve, causing it stick open.