Thanks a lot, I talk with IPD.
They say all parts for the PCV kit are genuine parts except intake manifold gasket. Which is supposed to be same quality.

"Many people (myself included) have found that the URO parts put in kits by IPD/FCP Groton are absolute garbage. Please, save yourself the hassle of having to do it again in 2 years and buy OEM Volvo parts that will stand up"

This was posted some time ago,
So not sure if they are selling qem parts ...

I am shoping for PCV kit, and not sure where to shop. Is IPD a trustfull place to buy ?
Someone said on this forum that you need to buy genuine volvo parts for this job and that ipd sells garbage. Any sugestions ?

Strange.
The car was scan using different scanner - by Volvo, and it shows that the O2 sensor is working and both fuel banks .
My scanner and two other one (independent mechanics) are showing fault in one of the fuel banks and zero volts for rear O2 sensor.
I have Autel Al 619 OBD II reader.

I got one from Europarts, and second one from Amazon.

The car was scan by two different mechanics using OBDII readers. Always showing that the O2 sensor is not working. My scanner was the third one.

Yes it is direct fit , plug and play.
I will check the connector anyway.
Any more ideas ?

I have seen previously this topic but never get to the final answer to this problem.

I have brand new (Bosch)oxygen sensor - downstream, and the scan tools shows 0 volts. This is the second sensor i installed. Both sensors were brand new made by Bosh. From what I read about it, previously, few guys ...

I notice weird banging noise when shifting from 1 st gear to 2nd. The noise occurs at the moment of clutch release. When I go slowly over the speed bumps, I have to shift from 1st to 2nd and back few times.
I know it is hydraulic clutch just not sure why it is noisy at the 2nd gear.
Beside that I ...

Ok, so why the AC is not producing cold enough air ? Because of the leak and low level of refrigerant ?