How do you fix trouble code P1781 on Chevy aveo 2004?

Trouble code P1781 on a 2004 Chevy Aveo typically indicates an issue with the transmission range switch or the related wiring. To fix this code, first inspect the transmission range switch for proper alignment and functionality; clean or replace it if necessary. Additionally, check the wiring and connectors for any damage or corrosion. If these components are in good condition, you may need to reset the code and test drive the vehicle to see if it returns.