I have three codes coming up on my odometer. p1388 p0463 and p1693. Anybody tell me what these three codes are?

 

P0463-high Voltage Detected At The Fuel Level
Sensor
P1388-auto Shutdown Relay Control Circuit
P1693-dtc Cleared In Companion Jtec Module

 

Do you have any idea how I would go about fixing these problems? I'm new at working on diesels. What would be causing high voltage and the fuel level sensor? and what is the relay control circut and why would it be automatically shutting down?

 

since I'm not a mechanic, the first question I'd ask is are you having any "symptoms?"

 

actually my truck is sitting dead in my front yard right now. I was driving home from work one night and my tach went out, then I didn't hear the turbo whine, so I pulled over on a gravel road and shut my truck off and she wouldn't start again. Still haven't been able to get her to start. We replaced the cam sensor and hoped that was it but now I have these other codes coming up. Don't have a clue. About ready to give up and take it to the dealer and shell out the money to have them fix it.