01-31-2016, 07:57 PM
Join Date: Jan 2012
Location: Calgary, AB
Total Cats: -11
AEM UEGO sensor offline MS3 issue?
After figuring out one bug another pops up.
Now I've got a problem with my AEM UEGO wideband. About a week ago, it would go from normal AFRs to reading extremely rich or lean, then display ----. It would constantly do that as I would accelerate. I chalked this up to a sensor going bad.
A few days ago, it was doing the above then completely stopped working. I had sometime today and pulled the wires to check them. None of them looked severed/damaged. Since I couldn't explain the lack of power, I respliced all the cables again and plugged it back into the MS3. Nothing.
I've checked all the wires and haven't found any damage.
I also ordered the same gauge brand new plugged it into the existing wiring. Not working.
My only two explanations are:
1) Either the MS3 harness or something on the MS3 board is not working as it should. How probable is this? MS3 Rev Built.
2) The old and new gauge are not working- The new gauge I bought looked like it was used even thought it was supposed to be new. So I can't verify whether the gauge is working or not.