[MarcN54]

I there,

First: sorry for my english

my 2009 E90 LCI with Stock (no Catless DP or so....) N54 Engine and 80tmiles on it, is Throwing 2 fault Codes.

Codes are 29F4 and 29F5, Knows as less Working catalytic Converters.

Both comes together.
Emission Test is excellent.

So i think cats should be good.

What i have Seen is: the pre o2 Sensors gives 2v Continuos.
The post Sensors are Jumping between 0,1v and 0,8v all The Time.

What can cause this Problems?

Have no other Problems, car Runs fine!

Best Regards from Germany,

Marc