Question

I got the engine code P1780 on my 1997 Mercury Mountaineer 5.0L, how do I fix the code?

Answer 1

P1780 Transmission control switch not cycled

You can only get this code when you do not cycle the transmission switch during a key on engine running test.

Comments

how do you fix it?

Answer 2

P1780 Mercury Code - Transmission Control Switch Circuit is Out of Self-Test Range
Read more: https://www.autocodes.com/p1780_mercury.html