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Duratec codes.

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Hey guys, I'm not to familiar with the duratec engine, but my buddy at with had one and he had done trouble codes. I have no idea what the mean and was hoping for a little help.

U2023 (network malfunction from external node)

B1676 (battery pack voltage low, out of range)

P0128 (coolant temp sensor) I know I can have that one lol.

And p1000 (onboard diagnostics cycle not complete)

Any help would be greatly appreciated!
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