135i n54 limp mode and smoke

[yuvir]

Hi guys I'm having the following problems with my 135i n54

1. Under hard driving vehicle goes into limp mode and starts to miss fire
2. Whiteish blue smoke from exaust(checked pcv valve seems to be working ) possible turbo oil seals?
3. Rough idle most of the time.
4 feels down on power.

Vehicle has software downpipe and intake, I have checked to see if the O2 sensors are functioning and are not swapped around, all seems to be fine

1.could the car just need a remap for the miss fire and rough idle issue
2. I pulled the plugs out to check if they are wet didn't seem to find any prob with leaking injectors unless they are possibly not functioning properly when the vehicle is running or high pressure pump problem.
3. If it is the turbo that's causing the smoking what's the best option to go with besides bmw oem

 

[Dean ///M]

Is there any oil in the exhaust? Who did the remap?

 

[Woodies]

Your errors look more o2 related, catless DP etc. either cat foolers or software not doing its thing. Smoke could be totally separate issue? I replaced a turbo recently due to a blown seal. Car only really smoked at idle when car up to temp, never smoked under acceleration.

 

[yuvir]

I haven't pulled the downpipes out yet to check for oil, according the the previous owner the log file for the software is 3 years old. It had excede software on it at the moment, I noticed last night after taking on a s3 that I could see smoke behind me, hard to tell what Colour it was, lucky I run out of road coz it went into limp mode

 

[M3_devil]

If I remember correctly the o2 grey wire must be on the rear DP.

Start by confirming that

 

[yuvir]

I swopped the O2 sensors around the p0041 (swoped O2 sensor) fault dissapeared but it started to miss fire worse, is it possible that they swopped the O2 sensors around when they did the downpipes and then they did the software with it swoped around? Yes the grey O2 sensor wire covering is on the rear dp

 

[M3_devil]

If the black cable is infront DP and grey cable is in rear DP then could be faulty 02 sensor.