Originally Posted by
richardb200373
So ideal reading is 0.45 volts for an 02 sensor right? Mine reads 0.13 on average. If I rev up the engine, it will go almost to 1.0 and drop back down. I replaced 1 (I have 2 on 2002 jeep 4.0L) but both still have the same reading. Why is it so low? Then engine is warm when testing. Any thoughts? Please help.
Ok, hold on, went and did another check. With my multimeter set on 20, on battery of course, reads 13.6v. On the 02 sensor, it fluctuates at 0.04 to 0.05, is it supposed to be 0.045 on the reading? I'm getting a little mixed up on this. Checking my efie to set it, it will go from 0.000 to 0.60, that is the furthest I've taken it. Someone please get me on the right path here, this is driving me freakin insane! One other thing, my engine light has been on forever, the codes lead to 02 and 0bd problems. I had the efie on with no hho as I was rebuilding. It was set on about 0.22. The other day the check engine light just went off. The minute I hooked HHO backup, it came on. I've been playing with the efie for a few days now and not getting any better, maybe a hair here and there.