Hi,
The P0700 is generic and only indicates via the PCM that a code is stored in the transmission control module.
The P0748 is a different story. As you are already aware, it is related to the modulator pressure sensor. The idea that it worked properly for 2 weeks after replacing the part leads me to believe we have a bad connection or a faulty wire. Recheck the wiring to the transmission for evidence of damage. Also, check all connectors.
If that checks good, I attached the diagnostics specific to this code. Take a look through them and let me know if you are comfortable performing them.
Let me know.
Take care,
Joe
See pics below.
Images (Click to make bigger)
SPONSORED LINKS
Friday, September 23rd, 2022 AT 9:57 PM