Chevy Check Engine Codes HELP PLEASE!!

[CRCRFT78]

I have a 1996 Cheyenne V6/5 speed that has been flashing the "check/service engine light" for awhile and today I had the mechanic at work scan it. He came back with several codes but I wasn't there for him to explain them to me. Can anyone break down the codes for me?

1.P0102 Mass Air Flow Sensor or Volume Air Flow Sensor
2.Circuit Low Input (not sure if this is part of the MAF sensor)?
3.P1406 Undefined Code?
4.P0700 (PD) Transmission
5.Control System P1192 (PD) (not sure if this is part of the transmission)

I'm not sure if these are in correct order, I'm going off of what he wrote down and how he listed them. Thanks in advance.

[gEtyOpAPiOn]

circuit codes are usually a bad fuse or wiring test for the maf that you have a ground an 12v+ the last wire would be the signal wire ,but with that many codes I would check the fuse box for bad fuses or corrotion

p0102 circuit fault code maf
p1406 circuit fault egr
p0700 apears to be a tranny circuit code too
p1192 same
so just look at your wiring first and make sure your batt terminals and grounds are ok

[CRCRFT78]

Fuses all look good. There is no fuse for the tranny in the fuse panel (5spd). Wiring and terminals all look good at the battery.