Citroen DS4 2.0 HDI error P2084 - engine fault indicator appears

Hello, the error code as in the subject of the car is new, so no one was burying the mileage of 48 thousand. error P2084 appears after approx. 8-9 km from commissioning. After deleting for the first time it was a month good now the code returns every day I checked the connections to the sensor the cable is not damaged or frayed. Is the EGT sensor replaceable? I noticed air bubbles yesterday behind the fuel filter after venting on the filter today I managed to drive 19 km and again a mistake. Or maybe a dirty filter and here you should look for the cause causes problems with exhaust fumes which is manifested in error?

Hello, buddy, if you have such an opportunity, reconnect your computer and check which sensor reads the temperature.

usually EGT sensor to be replaced

If the error caught occasionally I wouldn't care too much. doesn't it light up sometimes when it's wet? Maybe moisture on the cables has some influence? I would still twist this sensor and see if there is any residue on it

The sensor, however, to replace the wiring was OK. Thank you for your help.