Need help!!! DD13 cascadia 2014

Having some major electrical issues, codes listed below as well

problems:
oil pressure gauge on zero
Both check engine lights on
Smoke blowing soon as I crank the truck coming out of the One Box (or Aftertreatment System)

2014 Freightliner Cascadia (dd13)


Number:100 Mode:4 | Engine Oil Pressure Circuit Failed Low

Number:3510 Mode:3 | 5V Sensor Supply Bank 2 Circuit Failed High

Number:723 Mode:8 | Camshaft Position Sensor Time Out

Number:723 Mode:11 | Camshaft Position Sensor Failure

 

Yes oil is at max, I can’t reach the cam shaft sensor located all the way on the back of top engine block, may try to remove inside panel and come in that way. About to try to change oil pressure sensor now