Have Honda Questions? Ask a Honda Repair Expert.
If you have the incorrect gear ratio code that means the countershaft and mainshaft are spinning at speeds that are different than the should be which means basically that the transmission is beginning to slip internally. To fix that you are going to have to replace the transmission. There is no way around this once you get that code. Acura was helping customers with transmission repairs so you may want to call their customer service line, 1-800-999-1009 and see if they can help you out. They'll most likely want it taken to an Acura dealer for diagnosis but they may be able to help you with that repair. Let me know if you need more help.
Sure but I want you to know replacing solenoids or pressure sensors won't fix your problem.
DTC P0730: Problem in Shift Control System
DTC P0780: Mechanical Problem in Hydraulic Control System of Shift Solenoid Valve A and A/T Clutch Pressure Control Solenoid Valves A and B, or Problem in Hydraulic Control System
DTC P1739: Problem in 3rd Clutch Pressure Switch Circuit