Mk4 1.8t AUM intermittent loss of boost *Updated: Fault code 17963*

[jimmyGIT]

Mine did this after remap,aum engine code btw.Changed n75 for new version and all was sorted,that was 3 years ago now cheers.Yes also as said above check those horrible inlet manifold pcv pipes, had a split in there aswel.

[AntMk3GTi]

Cheers, Ive scanned it and got code 17963 Intermittent overboost.
I've checked the hoses around the N75 and they seem ok, new N75 has arrived so i'll fit tonight.

I got if from VW dealers so I assume they would've ordered the latest version available? didnt confirm whether it was F or E.  Is there a high chance that N75 is causing this code?

Thanks

[Scott D]

could be a boost leak somewhere causing that code

might be worth getting a leak test done before buying an N75

[Nino]

The n75 controls the boost to ensure that the car does not over boost. So my first thought would be a faulty n75. Fit your new one, clear the code and give it a few drives usually takes my car 2-5 days for codes to come back if I haven't fixed them.

Btw how much did it cost you from VW? And yes it would be the latest one look at the part number on the unit. It will ether end in J or E. if its E that's the most recent.

Boost leak would throw up 17705.

[AntMk3GTi]

Can I clear the codes with VCDS lite?

It cost £75. But when I checked the part number he said it ended in A?! I knew that wasnt right so they've order the right part now that ends in E, he said it's the newer version from F.

Apaarantly N75 can refer to a few different valves so it didn't narrow it down enough. New one is on the way though, I'll fit it tomorrow.

Thanks

[Dalo Harkin]

boost leaks leak oil, that's what you are looking for on any pipe that carries boost, there aren't that many, they come from the inlet manifold (boost ports are underneath) and the turbo/parts attached to the turbo.

[xtetx]

could be charge pipe

[Nino]

Yea you can clear codes with VDS lite