|Trouble Code||Fault Location||Probable Cause|
|P1637||Motor control module (MCM) – internal circuit malfunction||motor control module (MCM) programming, MCM|
We recommend Torque Pro
BAT Team Discussions for P1637
- 03 Silverado Battery not charging message
Battery light "Red" started coming on and message display read battery not charging. Volt gauge on dash shows a hair over 14 volts, fluke shows 14.2. I have cleaned connections and am confused if I may have a alt going south. I checked the two wire connector at alt brown and grey, with key on grey...
- 2001 impala battery dies every few days
Some thoughts came to me ... and worth adding... if you move the key to off position and remove BEFORE you place shifter in P the system goes AFU. Can remove key and walk away there is still power where it should not be... Can you did you check for B series codes? would you need a diagram- ...