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im getting these engine codes and was wondering what could be the problem. i just replaced my battery today and now im getting these codes.

P1682 Charging System Voltage Too Low Charging system output voltage low.
P0622 (M) Generator Field Not Switching Properly An open or shorted condition detected in the generator field control circuit.
 

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You may want to check the cable ends and make sure that you didn't knock something loose. Go from the alt to the battery & trace the bigger cable on the alt.

Toby
 

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Did you run the truck with the battery disconnected? Was the old battery totally fubar'd?

Check the battery and alternator connections. If they're good, try a PCM reset (pull battery cable for a min or so) and see if that does it.

If still no good, sounds like an alternator problem...get it tested.
 
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