[jnnguyxn]

Hi Everyone,

I have a 2021 540i and I've been trying to open the exhaust flap without throwing any codes.
I've been reading around but still haven't found an answer.

Before someone says use bimmercode or bimmerlink to open flap then pull fuse, my DMT is still locked and can't be tuned yet.

This is my first bimmer so I'm still learning.

Thanks for the help everyone.

[ezaircon4jc]

Originally Posted by jnnguyxn

Hi Everyone,

I have a 2021 540i and I've been trying to open the exhaust flap without throwing any codes.
I've been reading around but still haven't found an answer.

Before someone says use bimmercode or bimmerlink to open flap then pull fuse, my DMT is still locked and can't be tuned yet.

This is my first bimmer so I'm still learning.

Thanks for the help everyone.

Put the trans in sport mode and once the flap opens, pull the fuse and Bob's your uncle. That's what I did. There will be a stored code, but it will not trigger a CEL.

[jnnguyxn]

Originally Posted by ezaircon4jc

Put the trans in sport mode and once the flap opens, pull the fuse and Bob's your uncle. That's what I did. There will be a stored code, but it will not trigger a CEL.

Yeah I tried that. Whatever mode I have the car on in idle, the flap doesn't open.

[ezaircon4jc]

Originally Posted by jnnguyxn

Yeah I tried that. Whatever mode I have the car on in idle, the flap doesn't open.

IIRC, the engine has to be at operating temp. Try warming-up the engine and see if it works. Have you tried just unplugging the valve?

[jnnguyxn]

Originally Posted by ezaircon4jc

IIRC, the engine has to be at operating temp. Try warming-up the engine and see if it works. Have you tried just unplugging the valve?

I believe I tried putting it into sport after engine was warm.
Haven’t tried taking out the valve clip. Wanted to see if there were other options besides tuning.