Question

What will happen if I continue to drive car with code P0740 present? Honda 2003 Odyssey.

Answer 1

P0740 Toque convertor clutch circuit malfunction

This is the most popular code on Hondas, I see this all the time, What this is for fuel economy,what disengages this is a brake signal, If you coninue to drive this like this you will not have the fuel economy that Hondas are popular for, and because this is a clutch solenoid,controlled by the ECM you can cause the ECM to burn the clutch circuit  for the torque convertor driver,So if you replace the torque clutch solenoid and the code is continous you will need the ECM repaired or replaced.