MAF code

Okay. That is great. Just put some miles on it and then recheck the sensor to see if there is more oil getting on it. There should not be oil in the charged air system so if there is then this normally means the turbo is leaking. There is oil supplied to the turbo to keep it cool and lubricated and it seals this from the charged air side of the intake. So, if you have oil in there then that normally means the turbo is leaking and allowing oil into the intake.

You would have to replace the turbo for this unless there is a rebuild kit.

However, that is definitely the issue so hopefully it doesn't return.

Can you get a picture of the piece that you are looking for? I am only showing that the sensor is held in by two screws. Must be the wrong one.

Got it. Yep. That looks like it. Thanks for adding that detail.