HELP PLEASE! A ton of codes on car after getting service + downpipes installed

[elijdh]

Hi there!

So I got a service done to my car:
Replaced Turbo Pressure and Return Line O-Rings
Replaced Coolant Line O-Rings
Replaced Bank 2 Sensor 1 O2 Sensor

While the mechanic was up there I figured get him to install my catless downpipes as well. Also did my spark plugs (NGK Stage 1) and an oil change.

Before I got this done all I had was the O2 Sensor code and 2B28 (Fuel tank ventilation system and purge air system, micro-leak. I wasn't burning oil, had a very minor leak from turbo lines which is why I did all the o-rings.

Ever since getting this done, I got codes:

2A7A - DME - Camshaft position controller, exhaust, cold start
2AAF - DME: Fuel pump, plausibility
2B28 - DME: Fuel tank ventilation system and purge air system, micro-leak.
2C27 - DME: Oxygen sensor before catalytic converter: System check
2C2B - DME: Oxygen sensor before catalytic converter: System check
2C2C - DME: Oxygen sensor 2 before catalytic converter: System check
2C31 - DME: Oxygen sensor control
2C32 - DME: Lambda control 2
2C6A - DME: Oxygen sensor after catalytic converter: Swapped
2C6B - DME: Oxygen sensor after catalytic converter: System check
2C6C - DME: Oxygen sensor 2 after catalytic converter: System check
2C7F - DME: Lambda control 2
2DEB - DME: Power management, vehicle electrical system

My mechanic said the O2 Sensor codes and the lambda codes are just from the fact that I'm catless now... I don't feel this is accurate.

Can anyone help me with this? The moment I saw all these codes my heart dropped, this car has been an absolute money pit so far and now this.

Help, please!!

[ErvGotti]

Are you running a tune? You can't remove the cats and not expect emission codes. You will continue to have the lamda/O2 codes unless you suppress it with a tune or an O2 fix.

[Aceway]

Do all those codes come back after you delete them?

[elijdh]

Originally Posted by ErvGotti

Are you running a tune? You can't remove the cats and not expect emission codes. You will continue to have the lamda/O2 codes unless you suppress it with a tune or an O2 fix.

So I was tuned on MHD Stage 2 tune. I ended up swapping my O2 sensors (post-cat) and all the codes went away. I did have one code come back, with no engine light (2C31 - DME: Oxygen sensor control.)

Not too sure what this is for, but the car is running significantly better so far. The mechanic just installed the wrong ones in the wrong downpipes.

[elijdh]

Originally Posted by Aceway

Do all those codes come back after you delete them?

The codes always came back before I did the O2 sensor swap, but so far they have yet to beyond the one indicated in my above reply (2C31).