I have a 1997 Mercury Sable 3.0V6 and my scanner spits these 4 codes
141(o2 sensor bank 1 sensor 2)
171(feul system trim lean bank 1)
351(Ignition Coil A Primary/Secondary Circuit Malfunction)
1744 (Torque Converter Clutch System Performance)
What can I do to fix 351 and 1744

Replace the coil to fix P0351; the P1744 code means the torque converter is stuck in the off position. You're going to have to remove the trans to access the torque converter anyway so I'd recommend replacement of the whole unit, as those transmissions are known for being problematic.