1999 honda accord

Question

when this code comes up do i need to replace the transmission? o

Answer 1

P0780 Mechanical problem in hydralic control system for shift solenoid valve A and A/T cluch pressure control solenoid valves A and B or problem in the hydralic control system

This depends , this does not mean the transmission is totally worn, you can try a good known Toque convertor clutch solenoid valve / Shift solenoid A. and shift solenoid B. (what not shown is shift solenoid A )