Help! CEL after flashing stage 2 BM3

[revenlymokalu]

So I installed catless DP with sec cat - no resonator - MPE muffler.
The car still runs good. Warms up good. But CEL still there. WOT, it pops high RPM, ( when your foot still pressing the pedal). IT'S not burbles. It's 1.5x louder than burbles though ( obviously I think cause it's on WOT) thank you very much.
The mods only BM3 and catless DP.

[MikeeM3]

Originally Posted by revenlymokalu

So I installed catless DP with sec cat - no resonator - MPE muffler.
The car still runs good. Warms up good. But CEL still there. WOT, it pops high RPM, ( when your foot still pressing the pedal). IT'S not burbles. It's 1.5x louder than burbles though ( obviously I think cause it's on WOT) thank you very much.
The mods only BM3 and catless DP.

which tune did you use? There's one with aggressive burbles (the one im running) and it makes lots of noise when shifting

[revenlymokalu]

Originally Posted by MikeeM3

which tune did you use? There's one with aggressive burbles (the one im running) and it makes lots of noise when shifting

The regular one 91 octane.
I understand aggressive ones.
But mines popping when the RPM is rising.
I remember my harley is like that when the exhaust flanges were too lose.

[schnell325]

What code is the CEL?

[tek818]

datalogs?

[revenlymokalu]

Originally Posted by schnell325

What code is the CEL?

I just flashed it 4 hours ago and drove 10 miles everything was fine. Turned off the car for 30m and went somewhere. It just came up out of nowhere . I'll check tomorrow. What's the reading.

[revenlymokalu]

Here you go

[BuLoOoSki]

So.... is the description of the fault code shown in your DME not clear enough or what is it that you're asking?

One of your 02 sensors is not installed properly, go back to the guy who did your DP install.

[revenlymokalu]

Originally Posted by BuLoOoSki

So.... is the description of the fault code shown in your DME not clear enough or what is it that you're asking?

One of your 02 sensors is not installed properly, go back to the guy who did your DP install.

Hiiii.
Yes the last one I fixed it.
I'm wondering what about the rest?
It says those code but there's " no description"

[BuLoOoSki]

Originally Posted by revenlymokalu

Hiiii.
Yes the last one I fixed it.
I'm wondering what about the rest?
It says those code but there's " no description"

They are not tune related. Have you done any coding recently to your car? Clear them and see if they pop up again.

The best way to diagnose is to use a proper diagnostic tool/software, Rheingold (ISTA-D) is what BMW use, you can download it to get exact descriptions of these fault codes. Otherwise just search online for these fault codes and see if you get any hits.