Engine Codes Fixed by Tune?

[cooll_m3]

Hey everyone, yesterday I installed a full exhaust system from Bomiz on my 2011 E92 M3. The system has a complete cat delete and I was waiting all day for my engine to realize and throw me some codes. This is the second time I have made this installation and the first time I got the codes related to the absence of cats and that was it. This time, however, after about 20 minutes of driving the car went into limp mode and threw me the following codes which I read using the carly OBD port reader;

002B57 "Engine emergency program activated"
0027B1 "DME: Secondary air system flow rate, bank 2"
002B0D "DME: Idle actuator monitoring, bank 1"

I assume these codes are caused by the catless exhaust but if not could someone let me know, I have changed nothing other than that. These also are not the same codes I got the first time I did the installation but that's a different story.

I turned the car off and did some research and to my surprise, I returned about 3 hours later to start the car, and the codes were gone. I am assuming they will come back pretty soon but in my research, I found a lot of different stuff about the computer freaking out over air-fuel mixtures and increased exhaust flow and all that. I have spoken to some other people who said they experienced similar issues and got a tune and their codes and issues disappeared. Does anyone know if this actually works and if it is solving the problem or just telling the computer to shut up?

If it does actually work I have looked at tunes from Gintani, RK, and Alpine. I am not interested in getting burbles or increased horsepower at the moment, just deleting the cold start and getting rid of these errors. Any recommendations based on that?

[BPMSport]

The secondary air fault can be resolved with software.

The 2B0D is likely an issue with the ICV or associated connections, and is why you are getting limp mode/2B57 emergency mode fault.

You should have the ICV system checked/replaced, and then consider a BPM tune.

[E92Bean]

Get an Epic Motorsports stage 1 tune (stage 2 is catless). Cold start is eliminated and the tunes have better reliability than the others listed, plus no dumb burble tunes.

[fkaw]

I'm assuming you didn't change the donut gaskets that connect the exhaust to the headers. My car used to go into limp mode all the time and I went down a rabbit hole of changing the ICV and other stuff until some people told me it might be the donut gaskets. Just my two cents.