[Maxfusion]

Originally Posted by Freddie_Rome

Did you contact MG support?
Maybe with catless downpipe is different.

I`ve talked about catless pipe - I`ve run on it about half a year, and saw many soot BEFORE pipe and on lambdas, when I decided to weld a sportcat into my pipe.

[Freddie_Rome]

Originally Posted by Maxfusion

I`ve talked about catless pipe - I`ve run on it about half a year, and saw many soot BEFORE pipe and on lambdas, when I decided to weld a sportcat into my pipe.

Sorry, I mean, with 200 cpsi downpipe (my situation) is different maybe. Anyaway I'm going to try cat monitoring on.

[Maxfusion]

Originally Posted by Freddie_Rome

Sorry, I mean, with 200 cpsi downpipe (my situation) is different maybe. Anyaway I'm going to try cat monitoring on.

Pls try cat monitoring on and read dtc errors in diagnostics menu.

[Freddie_Rome]

Originally Posted by Maxfusion

Pls try cat monitoring on and read dtc errors in diagnostics menu.

So I setted on "cat monitoring" and no CEL light apperead! (but engine and cat were quite warm) Then I checked permanent errors with Bimmerlink and was clear. I didn't try to scan DTC with MGFlasher. I'll try tomorrow.
I was wondering, how could "cat monitoring off" increase mixture? It should be only like a simple electronic bypass.