airmaxon1

anyone heard of P1637C trouble code? fix for this?

00silver6

iTrader: (4)

cant find such a code. what car is it on? did you mean a p0137? what did you use to scan it?

2001NBMZ28

P1637? Generator L-Terminal Circuit. Has to do with the alternator.

www.gearchatter.com/viewtopic8806.php

airmaxon1

found out the code is P1637C, Generator and Driver Open circuit?

2001NBMZ28

Don't know what the "C" means on the end of the code, but I'd check the red exciter connection/wire at the alternator and make sure nothing has been tapped into it. When my alternator failed a few months ago it didn't throw a code - just wouldn't charge and slowly discharged the battery while driving. Might not be your issue, just my experience.