Hi!
My w203 started to loose power. Feels like supercharger is out.
I read error codes and there came up p2039 - powertrain - reductant injection air pressure sensor circuit low input.
Does anyone has idea where should i startfix the problem... If i erase the codes, the car will go just like before the error. Few days and then the supercharger "stops".
Thanks for answers!

 

Thanks for your answer. it was really helpfull and now i have fixed the problem.

 

if you used common sense when posting people would actually see this. I have the same problem btw. But you posted this 7 months ago.

 

Hello I have the same problem could you please guide me through the solution for it
Regards

 

Hi there
recently I came across the same code P2039 ,can someone guide me through the problem and how to fix it ?

 

Just an FYI- I replaced the recirculating air valve and forgot to reconnect a hose that connects to the
oil catch thingy that sits on top of the SC (and also the recirc air valve is attached to) and it threw this code.
So, perhaps check your hoses in and around the valve cover.