Last night I did a big progress and found very useful information about how the down stream sensors works.

I used the words: "voltage graph downstream O2 sensor" when Google searh.

Especially this youtube link was useful:

And I also found that the Car Doctor app had the Long Term Fuel Trim values which I don't have in Tourqe app. I now see that the LTFT values are totally wrong, -8% and -20%. But how can they have that values when the short term values are around 0% ? I have driven the car many miles / km so it should have been corrected.

I also have a question:
Do anyone know how long the cables are to the down stream O2 sensors? I use 0.5 m to the upstreams O2 sensors and they work fine.


I wrote about this and updated my homepgae, at bottom:
2005 years Chrysler Crossfire: Emission control system

/Lars