how do I fix this problem, what do I buy and where is it located

Question

Engine light is not on anymore but code appears after test, p1780. I wanna fix it myself if possible and so far a mechanic told me $800 . Where is it located?

Answer 1

P1780 Transmission control switch out of self - test

This is not a fault code but a procedure that is done to gather code, there is a KOEO (key on engine off) test to gather codes, then there is the KOER (key on engine running) test, this procedure requires you to follow steps in order to gather code , in begins Step on brakes, turn steering wheel, cycles overdrive swith, if any of these steps are missed it set a code, if the overdrive was not cycled it set P1780