helllllpppppppppppp

I need help i have a 97 geo tracker and It has no power, I got the trouble codes and they are P0141 O2 HEATER CIRCUIT----P0400 INSUFFICIENT EGR FLOW------P0740 TORQUE CONVERTER CLUTCH----this is driving me nuts.. I also need to know if anyone knows how to fix the torque converter. (sorry about the spelling lol) Please help me out!!!! April

O2 Sensor---can be replaced pretty easily. if bad, engine runs rich and uses too much fuel.

EGR Valve---can be either cleaned up or replaced.

Torque Converter---unfortunately, if the clutch is worn or faulty, the tranny has to come out and the torque converter either needs overhauled or replaced. hope this helps at all.