Mysterious open circuits- Diag help

[not_that_ICE]

I'm working on this 2013 ram 1500 with the 4.7 V8. After a ton of work fixing cylinder compression I went to start it and after a second of cranking it ran. In about a half a second I thought "good enough for me" shut it off so I could check out some stuff and went to turn it back on. I found out then that it was hard to start and it thumped around a lot. I got p0335 p0208 U110E and a fuel pressure circuit code that hasn't reappeared. I checked out the p0335 for the ckp circuit being open and I couldn't find anything wrong with the harness. I also know the battery is at a good voltage above 12v consistently but not quite 12.6v cuz charging and whatnot. I haven't looked into anything else just scratching my head. I know it could be the PCM but every time I think it's a computer I dig more and find some obvious issues. Could there be anything I could check before I look at new computers?
EDIT: I'm not ready to blame the sensors either because there are so many opens according to the DTC but I could replace those and see what that gets me

 

[not_that_ICE]

Update: replacing the sensor didn't help

 

[alpinegreenneon]

You should check for continuity for the wires in the connector to find an open. Just looking at a wire tells you nothing. Use a multimeter set to ohms and a test probe at each end of the wire you are testing with each connector disconnected. The very thin wires are easy to pull apart at a connector terminal, so an open can too easily happen. Don't blame the PCM or buy anything until you verify the wiring with a multimeter.

 

[Daw14]

Have your battery load tested , low voltage is the cause of lots of issues.

 

[not_that_ICE]

You should check for continuity for the wires in the connector to find an open. Just looking at a wire tells you nothing. Use a multimeter set to ohms and a test probe at each end of the wire you are testing with each connector disconnected. The very thin wires are easy to pull apart at a connector terminal, so an open can too easily happen. Don't blame the PCM or buy anything until you verify the wiring with a multimeter.

When I mean I can't find anything wrong with the harness this is what I mean. I used the multimeter to check continuity between the plug to the ckp sensor and the plug into the pcm. It beeps then in ohms mode it jumps between 0 and .2 ohms. 200milliohms would be a problem but I'm looking into that already and I can't verify that it's not just my connection to the terminals. I also checked the supply voltage and ground at the connector and it's getting a steady 5v exactly.

 

[not_that_ICE]

Have your battery load tested , low voltage is the cause of lots of issues.

Yeah I have seen that in the forum too. I'm going based off the way it cranks well and I have a plug in 200amp jump starter helping it most of the time. I'm not sure a load test will give me any better information but I could be wrong.

 

[not_that_ICE]

I talked with an AI to discuss some diagnostic methods and a general idea of what I should do next. Battery load and continuity was the first steps and it gave me a few ideas how to test it probably with what I had. It suggested that it should stay above 10V while cranking and my volt meter said it was. Continuity was the same deal, looked okay. Then 5v reference and meshes came up. I tested the 5v lines with sensors unplugged and plugged in. 5v was good. I tired cranking with sensors on the can bus or 5v unplugged, nothing new (I made sure I had crank plugged in and the code cleared but it came back). Tested the can +/- got 61.7ohms, looked good. Made sure the abs was talking on the network and that other sensors could communicate. There were some suggestions for testing module intercommunications that my diag computer couldn't do. Grounds were solid as I tested them guided by the AI. Got to the point where any new information or suggestions were between the tone ring or the PCM. I have so many reasons why it wouldn't be the tone ring but I didn't have a proper way to test the signal from the sensor. A replacement sensor didn't work so I guess I don't really know. But PCM explains the other failures that seem to also be working otherwise. Replacing PCM stay tuned, also still need advice and suggestions.