How do you fix p1861 code for Chrysler pacifica?

The P1861 code for a Chrysler Pacifica typically indicates an issue with the Transmission Fluid Temperature (TFT) sensor or its circuit. To fix it, first inspect the wiring and connectors for damage or corrosion. If they appear fine, you may need to replace the TFT sensor itself. After any repairs, clear the code using an OBD-II scanner and monitor for reoccurrence.