need o2 sensor help!

[Xevuhtess77]

ok im tryin to get my a/f ratio reading from my o2 sensor but the voltage keeps fluctuating from 0 to .7v about once every second. i thought its supposed to fluctuate faster between .4 and .6v? yes my car is completely warmed up, held it at 2.5k rpm for a couple minutes too. if i hold the rpm around 2k-3k the reading fluctuates twice as fast and it gets closer to between .4 and .6

can someone help me with this?

[Kwanza]

Originally Posted by Xevuhtess77

ok im tryin to get my a/f ratio reading from my o2 sensor but the voltage keeps fluctuating from 0 to .7v about once every second. i thought its supposed to fluctuate faster between .4 and .6v? yes my car is completely warmed up, held it at 2.5k rpm for a couple minutes too. if i hold the rpm around 2k-3k the reading fluctuates twice as fast and it gets closer to between .4 and .6

can someone help me with this?

That's pretty normal that the O2 fluctuates during cruise speed and idle. That's why they're narrowband O2 sensors. For the most part, most stock sensors are narrowband and will fluctuate all the time, except at WOT...

[Xevuhtess77]

i know the're supposed to flucuatte, but this much?everwyerhe i've read says that it should be around .4 to .6 volts

[white90dx]

Originally Posted by Xevuhtess77

i know the're supposed to flucuatte, but this much?everwyerhe i've read says that it should be around .4 to .6 volts

No, they are supposed to go from about .1V to about .8V... This is very normal.

-Charlie

[fredk]

its normal guy, but with age, you will see it starting to cross over .5volts slowing down