Audi A4 oil level

[Twamers]

So was driving home from work the other day lost boost and the check engine oil light came up, pulled over checked oil and level was absolutely fine. So got a friend of mine to come down and plug it in and has come up with a N75 valve fault and a under boost fault. Now will this N75 valve solve my issues with the oil light coming on as it's strange they happened at the same time. Any advice would be great, cheers!

Car is a 2008 2.0tdi B8

[Magnet]

Hello Niall,

Thanks for being in touch. 

I will attempt to answer your questions:- 

Will renewing the valve sort out the (falls?) oil level warning issue? 

More basic question will be, will replacing this valve, sort out your boost problem? If may, but it seems you are assuming that your mate’s diagnostics (basic kit) is pointing to the correct offender. Many and indeed most, owners put their faith in theses codes, and assume that if the code points to component x, that x is at fault. It may be, but it could be ‘at fault’ due to receiving an inadequate signal from component y. So, a long way of saying changing the N75 valve unfortunately comes with no guarantee of solving even your boost - it may, but may it will be. 

If this were mine, I would be first wanting to check all associated pipework to check for leaks - which could

Your oil warning. Was this a warning for a low oil level, or a low oil pressure? Very much two different issues, and needs to be clarified. 

Way forward:- 

Throw a new valve at it in the hope that it will solve the issues, or - better option in my book- invest in an hour’s time of a trusted local diesel specialist, and move forward from there. 

Kind regards,

Gareth. 

[Twamers]

So my mates basic kit was his snap on code reader (not so basic) and he is also a BMW tech so really I was just asking for advise if anyone has had a similar problem to this before. The error that came up was check oil level on the dash, the oil level is fine so I expect this is a oil pressure issue. My understanding is a red oil level warning is actually an oil pressure warning?

Have started to think it could be related to the oil pump hex key issues that I early TDI engines suffered from. 

But thanks for the reply will be getting looked at ASAP. 

[Magnet]

Thanks for the additional information Niall. So with your mate’s background, it would seem you are totally equipped to successfully fix both issues then. 

Apologies, but I’m still confused by the oil warning - you say it was an oil level warning, but since the oil level is OK you assuming it’s an oil pressure warning? Sorry, don’t understand. 

Anyway, good luck in getting it fixed, and it’s quite possible that someone on here may have had the same problem and will share their findings with you, but if not, it would be great if you could let the forum know how you get on. 

Many thanks and kind regards,

Gareth. 

 

[Twamers]

Well there is a red and a yellow low oil message warning that Audi use, and the red is oil pressure apprently from what I have been told/read.

The message that I have is red, leading to believe that it's to do with oil pressure.

[Magnet]

Sounds sensible Niall, and different and understandable and different from what you sated in the opening post! 

So now you need to get the oil pressure values read - under optimum running conditions. 

Kind regards,

Gareth.