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Hello. I have a 2012 versa. I just did an engine swap but now it's not starting. Pulling a U0100 code. Lost communication with pcm/ecm.
I have no idea what to do or why this happened. Any advice would be greatly appreciated.
 

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2016 Nissan Versa S (manual transmission)
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You might want to check on ebay, there is a company that repairs and writes VIN numbers to PCM/ECM. I imagine you could message them, ask them to help you out and give you an estimate to write the donor engine VIN to your PCM/ECM.
 

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Hello. I have a 2012 versa. I just did an engine swap but now it's not starting. Pulling a U0100 code. Lost communication with pcm/ecm.
I have no idea what to do or why this happened. Any advice would be greatly appreciated.
Same thing happened to me until I discovered several connectors that were difficult to snap together. You have to make sure that you can hear a fairly loud click when you put all of these connectors together. U0100 is a dead giveaway for this problem...
 
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