Oil exist in downstream Oxygen sensor

[amjad2020]

Car Model: 2009
C200 class kompressor

The engine's lamp is on, so I had a computer test, and got the following error code as attached 2096, 3563, 2196, and 0135



The technician told me that the oxygen sensor need to be cleaned or replaced, so when he removed the sensor he found engine oil at the sensor as attached:




Any suggestions? The technician couldn't determine from where this oil leak happened.

 

[W1ghty]

Car Model: 2009
C200 class kompressor

The engine's lamp is on, so I had a computer test, and got the following error code as attached 2096, 3563, 2196, and 0135
View attachment 116856


The technician told me that the oxygen sensor need to be cleaned or replaced, so when he removed the sensor he found engine oil at the sensor as attached:

View attachment 116857


Any suggestions? The technician couldn't determine from where this oil leak happened.

The oil probably comes from the cam magnets on the front of the M271 engine , the two round things top front . Unplug one of the electrical connections to check them

 

[W1ghty]

 

[amjad2020]

Thanks

W1ghty​

It seems the oil leak from this sensor that you mentioned, I disconnected the cable, there is shining oil inside

 

[W1ghty]

You will need two new cam magnets , the round things . But the problem you have first is the oil in the wiring which has got to the low point of the car (the O2 sensor ) , it will also be in the main electrical connection on the right of the engine as you stand in front of the car.
I will take a picture of the electrical connection on my car if you need me to

 

[amjad2020]

Thank you, I will appreciate taking a picture for clarification, and for the magnetic sensors, I will change both of them.

Regarding the leak, The technician told me that he added 1.05 US quarters to the engine, so does this leak lead to this amount? "Last time I changed the engine oil one year ago, and the maintenance time is due now"

Also, the technician told me that he doubts the Kompressor "Supercharger" because all the tubes after the kompressor are full of engine oil

 

[W1ghty]

Thank you, I will appreciate taking a picture for clarification, and for the magnetic sensors, I will change both of them.

Regarding the leak, The technician told me that he added 1.05 US quarters to the engine, so does this leak lead to this amount? "Last time I changed the engine oil one year ago, and the maintenance time is due now"

Also, the technician told me that he doubts the Kompressor "Supercharger" because all the tubes after the kompressor are full of engine oil