Lost Communication With Reductant Pressure Sensor

[Jlamuk]

Hi, while out today my dpf light came on so just plugged it in to vcds to see what’s going on. Vcds has the following errors, does anyone have any suggestions what could be the source of the errors? Adblue pump?

 

[manfrotto]

Did you clear the codes and see if they came back?

 

[Howzat]

Chewed wires? Few instances of that on here.

 

[Jlamuk]

the codes do not clear the communication one stays active and the pressure one comes back as soon as you start the van and drive a few yards. I think found the source of the problem last night. when I initially checked the wiring the underside of the van was wet but last night it had time to dry off and I could see adblue crystals all over the underside of where the tank is. further testing with vcds and inspection has shown that the seals have gone on the pump causing the leak, so i'm going to swap out the pump which should fix the leak and with a spot of (good) luck that will resolve the communication problem as all the wires and connectors look ok.