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O2 sensor readings all over the place

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hoycoconut

20+ Year Contributor
45
0
May 10, 2003
MassachusettsUS
Just got my Pocketlogger :)

My A/F guage bounces around like mad and now according to the logger so is my Bank 1 O2 sensor voltage. The graph from a trip around the block looks like this

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

well more jaggie than that. I assume that is abnormal. I threw my CEL with a bad heater circuit on that sensor and have one in the mail, just wondering what to expect when I put the new one in.

Thanks

JT
 
If you were just driving around normally then yes your O2's will be all over the place, that's normal.

They don't steady out untill you go WOT then there should read somewhere around .94v
 
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