O2 values

[jinjur]

Hi gang,

What is the general thought if both O2 sensors are starting to track the same/similar values when logged?

Does the following start to look like the cat isnt working as it should? Car was up to temp btw.

 

[dann2707]

I would say that although they're showing similar values, check out the balance on the rear lambda sensor, it hovers around the higher voltage 2/3 times as longer as much as the front lambda sensor indicating that there's bias towards that value (think pwm signal).

 

[jinjur]

Its a fair observation, I just find it odd though as I am 100% sure that the rear O2 value used to sit at a rock solid 700 or so

 

[Louis]

Rear is meant to be stable. Wont be anything to do with the cat, as they sit stable outside of it.