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Just got the truck (2001 F350) back from the transmission shop (transmission rebuild) and I’ve had hard-ish starts and now a P1670 error code.
As background, I replaced my battery wires last year with welding wire and new lugs. I also installed a toggle switch in the cab to kill the IDM (see Springer Pop’s website).
Any thoughts on what might be throwing this code?
I have yet to verify the connections to the starter but I may start there.