I put in aftermarket O2's...Then my scanmaster showed the left(driverside) one was stuck at 445 volts while the otherone was fine. The service engine light came on, and it ran like crap....now the FANS TURN ON! WTF!This threw off my BLMS and Injector pulse(make RBLM go up to like 160).

So I put back in GM O2 that was fine, never messed up, I just replaced it cause it was running rich. Its still running exactly the same. SHowing the L O2 is running right at 445 with a different O2.

When I have a chance I guess ill switch out the passenger side O2 as well and see if that changes anything.

Anymore suggestions, I cant stand my POS Lt1 right now!!!!!!!!!

 

Sounds to me like the aftermarket O2 is the wrong one for your car, or it's defective.

I'd recommend using only GM oxygen sensors, as a lot of people have reported issues with aftermarket ones.

Thomas.

Edit: I just read your post again ..... are you saying that the readings didn't go back to normal when you put the GM O2 back in?

If that's what you are saying, then take a close look at the wiring harness leading to the driver's side O2. The O2 wires come very close to the #7 spark plug wire ..... if they are too close, or touching, the plug wire will induce voltage into the O2 wires causing incorrect readings.

 

Correct, the car is acting exactly the same after I put back in the driver side (left) O2. I still gotta switch out the passenger side one, but accord to the scanmaster, it was showing no problems with the passenger side one. I guess ill see after i switch both of them back.

 

Loose O2 sensor harness, broken/burnt O2 wire, etc.