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So my problem started with throwing the code P0201 P0207 and P2146 and code 41 injection control signal fault or internal malfunction. Chased the wires from the alternator bracket to the ficm and all the way down to each injector connector and replaced all injector connections on all injectors. Cleared codes and still runs like a tractor. So decided to buy a remanufactured FICM not sure if it needs programmed or anything but it has been throwing codes P2146 and P2149 and P1293. Will start but it's a rough start and shuts down. The only other thing I have yet to do is trace the wires from the c107 bracket. I'm at a loss on what the issue could possibly be I am stumped. Any help would be greatly appreciated.
 

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It would be a very good thing for you to subscribe to ALLDATADIY.COM or other similar service. There's a wealth of information about your truck available and this is the easiest and cheapest way to get it. You can look up individual parts of your truck, or DTC's showing testing procedures, major systems, wiring diagrams, how systems in the truck operate, etc. It's the best money you can spend on your truck and will save you lots of time when you have the correct information. If you're willing to do the work to fix your truck, this is your best helper.
 

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I fought this for almost two years. Finally changed out the entire engine harness for a new one and she runs like a top now.
 

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Ficm doesnt need programmed
 
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