Question

On my 1996 Lexus LS400 4.0L, I got the engine codes P0770 and P0773 how probable is it to have a broken wire in the transmission wiring harness?

Answer 1

its possible, but more likely its another problem look at list below, I would say its more likely in that order

Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid E valve
- Shift solenoid E valve harness or connectors
- Shift solenoid E valve circuit is open or shorted

Answer 2

P0770 LEXUS - Shift Solenoid 'E' Malfunction
Read more: https://www.autocodes.com/p0770_lexus.html

P0773 LEXUS - Shift Solenoid 'E' Electrical Malfunction
Read more: https://www.autocodes.com/p0773_lexus.html