OBD ll Problem please help!!

[2fast4u]

I have these OBD ll codes and i dont no what they are and how to fix them. these three codes I cant figure out.

P1133
P1637
P1860

These codes will come and go and I cant figure out why.
P0102
Which is my Mass air flow sensor circuit, low input
P0103
Which is my Mass air flow sensor circuit, high input
P0138
Which is my Oxygen sensor circuit, high voltage (post-converter sensor, left bank)

How can i get these to stop coming on Please help!!!!!!!

[2001NBMZ28]

You can look up the code descriptions/diagnostics at gearchatter.com 1133 is your front drivers side 02, 1637 is an alternator issue, and 1860 is a TCC PWM solenoid electrical malfunction in the trans. 1860 isn't on gearchatter so I'll post a link for it.

Is the car stock? If you have any mods make a signature and list them, it'll help people answer.

[2001NBMZ28]

Here's the link, sounds too complicated to me and best left to a professional, but at least you know what it is and what heppens when it sets: www.ls2.com/boggs/a4/DTC%20P1860%205.7.htm

[2fast4u]

Thanks you