Error Code Help

[FamousZ]

I wasn't sure which thread to put this under but my 2000 Z28 has been throwing some error codes that I can't seem to figure out and get them fixed... So I turn to the members of mifbody to hopefully guide me in the right direction in getting these problems fixed so my car can run as it was intended to..

I recently changed the fuel filter, plugs,wires and alternator...

Here are the codes that appear, plus my security light is always on in the gauge cluster and I was a wondering how to get rid of that too...

P0131 02 circuit low voltage (bank 1, sensor 1)
P0134 02 circuit no activity detected (bank 1, sensor 1)
P0300 random misfire detected
P1153 bank 2 fuel control shifted lean (FAOSC) (see p2098)
P1637 can link ECM/ABS control module circuit/network

My car has ory, long tube he headers and a borla exhaust.. That's the only major stuff done to the car as of now.. Please help me!! I posted on ls1tech and have no response..

[1BADAIR]

exhaust leak on the right side?
swap the 02's from side to side. if you have the old rears put those in

[Emulsifide]

Have you tried clearing the codes? Given the fact that you replaced the alternator, I'm assuming you had a period there where the car was freaking out due to low voltage. That alone could be the cause of everything above.

[FamousZ]

Yep I've cleared the codes many times...

[Emulsifide]

We need more information then. Can you give us a breakdown of when the codes started popping up? When you clear them, do they all immediately come back? Did they all happen at the same time? Why did you replace your alternator? Do you ever spray down your engine bay with a hose?

1BADAIR has some good advice if it's indeed a true o2 sensor problem. That P1637 leads me to think it's an electrical gremlin that's causing everything. What about your grounds? By chance have you looked around to see if an engine ground strap has come loose or severed?

[FamousZ]

We need more information then. Can you give us a breakdown of when the codes started popping up? When you clear them, do they all immediately come back? Did they all happen at the same time? Why did you replace your alternator? Do you ever spray down your engine bay with a hose?

1BADAIR has some good advice if it's indeed a true o2 sensor problem. That P1637 leads me to think it's an electrical gremlin that's causing everything. What about your grounds? By chance have you looked around to see if an engine ground strap has come loose or severed?

To be perfectly honest I am not sure on when they started popping up.. When I had the headers put on I never tuned until recently, so I was just always used to the SES being on.. But I do know it has been within the past couple months when they started.. And like 2 weeks ago I had new plug wires put on, and I cleared the codes then.. When driving at first it will run good, then ill pull up to a stop sign and the car at idle will feel like its about to die, yet the battery meter stays steady at where it should be.

I replaced the alternator because it just quit working, my power steering reservoir was leaking and I think maybe it kept leaking onto the alternator causing it to short, but not totally sure on that.. I havent looked at grounds because I really didnt know what to look for or where to look...

Does this give any more info?

[1BADAIR]

p1637 is an alternator code
p0134 and p1153 are insufficient switching. - probably old sensors

also. what 02 extensions did you use? cheap ones will cause low voltage codes and such