SCR and doser valve codes.

I have a 2012 Volvo D13 that has code 5394 FMI 17 and 5394 FMI 5. I have gone through pages of diagnostic testing and have come up with low voltage at the doser valve plug while the key is on, with key off the voltage is fine. I also found oil has traveled through the oil pressure sensor through the loom and into the ECM plug. I replaced the oil pressure sensor cleaned the connections and put back together, this cleared my code for J1939 datalink improper update rate. If someone could please help me out that would be fantastic as I have this drivers company up my #####.