02 accord, v6 , 4door sedan

tcs light, check engine light and flashing d4. automatic transmission. 2nd and 3rd gear gives problems, went for rebuild, mechanic said transimission is good but he change 2 sensors, car felt better but about 50miles later problems came back along with lights, i cleared the codes for an inspection and miraculously problems immediately went away for a while (15minutes driving), now problems are back.

(cel p0704) diagnosis says
1.maybe poor electrical which is good
2. low tranny fuel with is good and/or
3. tcc solenoid problems which mechanic says is good, am not mechanic but possible answer wld be really helpful.

mechanic changed 2 sensors (i dont know names)

 

Year and model Accord? I'm going to assume that it is a 96+ Accord where you have given an OBD2 diagnostics code.

Are you sure it was P0704 and not a P0740 diagnostics code? 0740 is an issue with a faulty lockup control system. There are a couple solenoids that should be cleaned/replaced for this issue. if it is not resolved you should recheck the code.

If the two solenoids have been replaced and you are still getting an OBD2 code P0740 in conjunction with a D4 code 40. It is most likely a problem with the transmission and/or torque converter. The transmission will most likely have to be replaced. Very common issue with 98-02 V6 Accords.