P0631 - TCM VIN Not Programmed Or Mismatch

What does P0631 mean?

This code means the Vehicle Identification Number (VIN) has not been programmed into the Transmission Control Module (TCM), or the VIN is incorrect.

• VIN not programmed after TCM replacement
• Incorrect VIN entered during programming
• TCM fault preventing VIN storage

Click steps to track your progress.

1. 1

   Program the TCM with the correct VIN.

2. 2

   Double-check the VIN for accuracy before programming.

3. 3

   Ensure the programming equipment is functioning properly.

4. 4

   A dealership or specialized shop can assist with this.