Hi,
The code, P0731, occurs when the PCM detects a first gear’s input speed sensor and transmission output speed sensor. As a result, the vehicle cannot shift properly.
There are a few things that can cause this to set. Something as simple as low or contaminated transmission fluid, a dirty filter reducing line pressure, a TCM that needs to be reprogrammed or replaced, a faulty shift solenoid, and so on.
Are the two codes indicated, the only ones stored? If there are additional ones, let me know what they are.
I attached the diagnostics specific to this code below. Take a look through them and let me know if you are comfortable doing them.
Take care and let me know what I can do to help.
Joe
See pics below.
Images (Click to make bigger)
SPONSORED LINKS
Friday, November 12th, 2021 AT 4:14 PM