N54 30ff code

[Silverbullet767]

I am getting a 30ff code when under high load in a high gear, but the stange thing is, I've never had this code before until I did a DIY oil and filters + spark plug change, could they be related or is it just a coincedence?

[Dannbodge]

30FF is generally boost related

I would guess that removing the engine cover has upset one of the vacuum lines (As they are routed nearby, underneath it etc)

I would check those for leaks or splits etc.

[Elliot2000]

30ff is measured air mass to calculated air mass out of range, if you have done work on it, then that would be the first thing I’d check - air filter, air box and vacuum pipes like previously mentioned.

That can also come up due to coked up valves. Is that the only fault code

[Acidrop]

30FF can be caused by an array of things. Most commonly a split in a vacuum line, faulty boost solenoids or worn/incorrectly adjusted wastegates.

[Silverbullet767]

Elliot2000 said:

30ff is measured air mass to calculated air mass out of range, if you have done work on it, then that would be the first thing I’d check - air filter, air box and vacuum pipes like previously mentioned.

That can also come up due to coked up valves. Is that the only fault code

Had a look at the air box, and a couple of the clips were misaligned, so I took it off, reseated the air filter and made sure 100% that I refitted the box correctly. The code hasn't returned, hopefully that was the cause. And I'm not sure what the E46 comment was about, wrong thread I think.

Thanks for the help.

[helix402]

E46 gone! ‘Twas an error.