This is the second time i have ran in to this code. My truck did this a few weeks ago where it would barely turn over with no white smoke coming out. I would stop and start leaving the key in the on position trying to crank it and it will finally start and blow a ton of smoke out then the idle clears up. I checked the codes and came up with P1670 again. Does anyone have a clue why im getting this?
Ive read it could be cps, weak batterys, etc. Batterys are just a month old and it only happens when it gets into the teens but not all the time.

 

It means there's faulty circuit between the PCM and the IDM (injector driver module). you'll have to check the resistance of the wires between the IDM and the PCM. wiggle the wires while checking and check for spike in v or open. I also had dirty connection on my batteries cause this code as well.