I have error code p1738 p0780 p1259 p1491 was wondering what my solution would be

Question

I have an 02 Honda Accord 4cyl 2.3l 140k miles. Have a few error codes. P1491 p1259 p1738 p0780 needed help on what I should actually replace.

Answer 1

P1491 EGR insufficient lift

P1259 Problem in the VTEC oil pressure switch circuit or VTEC solenoid valve circuit

P0780 Mechanical problem in hydraulic control system for shift solenoid valve A

P1738 Problem in 2nd clutch pressure switch circuit

Setting P1738 would set P780, even though these point to a mechanical problem with the transmission that only possible, With a EGR code, a VTEC code and a shift solenoid code, they all have one component in common , it uses the same ground check the ground listed as G101.