Technical o2/lambda sensor

[maddog1363]

hi i have read my o2 sensors using obd 2, and this is the result

sensor 1 - one jumps between 0.1v to 0.9v constantly (with i think is normal?)

sensor 2 - the other stays at around 0.435V and doesnt really move

surly one need replacing?

 

[DaveMcT]

Wait for more knowlegable advice but I believe you are ok.

 

[vitmas]

It should be ok.
If second oxygen sensors repeats first sensor signal it means no oxidation occurs in catalyst converter so there’s no converter at all or it’s retired…
And quatation from www.mkiv.com
[FONT=&quot]“[/FONT]The ECU expects the signal from the sensor to be oscillating from below 0.4v to above 0.6v…”

 

[D4nny8oy]

That's bang-on for a correctly operating set-up, and illustrates the point me and T were making here- https://www.fiatforum.com/punto/269476-lambda-voltage.html