Question

Is a new transmission the only way to fix/repair code P0780 for a 2002 Honda Accord? (excluding that the fluid is ok).

Answer 1

The possible causes for P0780 code

 

Possible causes

- Low transmission fluid level
- Dirty transmission fluid
- Faulty shifting solenoid valve
- Shifting solenoid valve harness or connectors
- Shifting solenoid valve circuit is open or shorted

 

it depends if something is damaged in the tranmission, if it was low on low transmission fluid level and it was driven it might have got damaged. or it could be....

- Faulty shifting solenoid valve
- Shifting solenoid valve harness or connectors
- Shifting solenoid valve circuit is open or shorted

Answer 2

P0780 HONDA Code - Shift Control System Fault
Read more: https://www.autocodes.com/p0780_honda.html