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Hello I will help you with your question,
Normal battery voltage is 12.6 volts so if you are only seeing 11.6 you need to remove them and have them tested. Low voltage would account for the code and the no start.
Once you are sure the batteries are good you need to see that the charging voltage is 13.5 or higher at 1500 rpm, if it is low or nothing the alternator must be replaced as well.
let me know how I can help you with this
If the batteries are junk then they will not hold a charge. They are the basis for all the electronics.
If the batteries are junk they will not take more than a surface charge so take them out and have them load tested at an autopart store for free. I'm pretty sure they will fail so replace them. If the alternator has been trying to charge them for long it will be overheated and need to be replaced as well
Do you have one battery or two?
What is the voltage when you are cranking the engine if you measure at the battery posts?
Your diesel need a lot of cranking power to spin the engine, if it falls below 9.6 volts while cranking then the electronics will store the low voltage code and not have enough voltage to get the engine running.
See what happens but I think it all comes down to low voltage while cranking.
What do you notice while it is cranking?
Does it sound normal?
Do you smell fuel? Is there white smoke?
With low battery voltage the electronics can be damaged so you may have to go back with what you have done before. The codes came back or are there no codes now?
So what are the codes?
Will it cough on quick start?
OK, so maybe it is just trying to get it started and you are washed down.
A cough is when it tries to start for a second when you spray a little starting fluid in the intake. A good way to tell if you have a fuel problem or a mechanical problem.
I am going to OPT OUT of your question, I am the first to admit I do not do diesels but when you posted the battery voltages I knew they were junk so In wanted you to get that right before you moved on with the rest. The battery is the base for the rest of the system.
Glad you got the batteries replaced but I will let another tech help you with the no start.
Hello, new expert here. I can assist you with your concern. It's good you got the camshaft code to erase. The P2285 will create a no start. This means the icp sensor and connector are bad. When you're move the icp sensor you will see the connector is covered in oil. You will need to replace the icp sensor and connector. The heat destroys the icp connector. The icp sensor is 1"1/16 size socket and is mounted on the high pressure oil pump cover. This is under the turnoff course and isn't a fun Job. If you have a scan tool that can monitor live data while trying to start it would be easier. Replacing the icp sensor and connector will allow this vehicle to run again.
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Icp psi needs to be 500psi in order for the injectors to fire. The Ficm voltage shouldn't drop below 45v when trying to start the vehicle. Make sure the PCM sees an rpm signal as well. If you aren't getting an RPM signal I would remove the camshaft sensor and clean it's mounting surface off. This can make the difference between starting and not starting. If you can update with these results we can go from there
If you remove the the top fuel filter cap is it full of fuel?
Well I'm sorry you don't have more time to correct the concern. I'm sure we could have gotten it repaired. This engine of course does take some time to diagnose.