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Help with intake leak code

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Jons1001:
Hi all, the following code keeps coming back on my mk5 gti.

P2279 - Intake air system leak

Car seems to be driving fine, boosts normal and mpg is ok.

I did the dipstick test and it definitely doesn’t sound right



Does this point to Pcv valve?

Pcv was changed approx 30k miles ago and diverter valve 40k miles ago.

Any further tests I can do to single out the issue or should I take it to the garage for a smoke test?

Thanks

GVK:
Smoke test if you can get it done locally

Jons1001:
Update:

Took it to the garage for a smoke test and they found that a screw was missing from the MAF sensor (should really have spotted this myself!) and a blanking cap was missing from the vacuum line. This was sorted and a second smoke test showed no leaks however 2 days later the code is back along with others.






Does anyone have any ideas of what I could do next to check what is causing this? I’m going to take it back to the garage to get their opinion but don’t want to start throwing money replacing DV, PCV, MAF sensor etc if there is a way of narrowing it down.

I have obdeleven if that helps with any diagnosis.

Cheers

mjmallia:
Sounds like PCV to me as pulling the dip stick out would make the car almost stall and hate that it was even turned on.

Was it an original PCV as I once used an aftermarket one that failed within a year, put an original on and its been fine for much much longer since.

Jons1001:

--- Quote from: mjmallia on November 20, 2024, 08:09:55 am ---Sounds like PCV to me as pulling the dip stick out would make the car almost stall and hate that it was even turned on.

Was it an original PCV as I once used an aftermarket one that failed within a year, put an original on and its been fine for much much longer since.

--- End quote ---

Hi yes it was a genuine PCV. I'm edging towards maybe changing the PCV & possibly DV aswell and see if that solves it.

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