I will explain better I have a stylus with the egr valve disabled by the ecu, but every so often I get it out ? with lamp on l error of the egr.
The problem from what I have understood ? the command of the valve, since I had already? did the job of turning off the valve, I would not change it, but turn off these errors? I don't know what I have to move.
Po402 it seems to me, is this the error you know if you can? delete?