I agree and thank you very much for your time! Hello to the Land Down Under!

I am sorry, I am trying... it's getting so confusing and I am not an auto mechanic. Ok, I believe you, I just have no way to test the sensors.

I replaced the front oxygen sensor twice in one month, the first one was not OEM and it triggered a code P0131.... I then got a Bosch OEM... But, while I had the first sensor, with P0131, the car was running just fine. At leat I could drive on the freeway at 75 mph if I wanted too.... I seriously do...

precopster wrote:

precopster wrote:I wonder if you put in the wrong O2 sensor. Which part number(s) did you purchase?

Can you provide an answer to this question so I can check the part number you fitted?

Front: 15097 Bosch OEM
Rear: 15062 Bosch OEM
Sorry I believe I missed that question when you posted it.

So I did reset (again) the ECU with a fairly long battery disconnection, followed the Volvo relearn procedure, but it made no difference...

misha wrote:The only code stored is po422?Are there any pending codes?

Right now the only code I have is P0410, nothing else, nothing pending but please know that driving over 40 mph is nearly impossible so not all test were completed.

... Before I did the fluid change I did notice a fairly noticeable lack of power / performance and that was after I replaced both Oxygen sensor and the code triggered back then was P0422.. Did you reset ecu when you replaced o2 sensors?A simple negative cable disconnection for a 10-15minutes,then p...

Well based on that test I did.... going full throttle less than 5 sec on D holding the brakes, I get 1600 RPM instead of 2600. According to Volvo, it points to a bad torque converter or a plugged catalytic converter. More than 2600 RPM would be a slipping transmission if I remember well. I did watch...

...I did not unplug the MAF because without it the car runs like hell... This is quite unusual. The car should struggle just a bit then the ECU goes into a default mode and the car runs smoothly. Did you unplug it first, then start it up, then give it a minute for the idle to smooth out? If so, the...

Well based on that test I did.... going full throttle less than 5 sec on D holding the brakes, I get 1600 RPM instead of 2600. According to Volvo, it points to a bad torque converter or a plugged catalytic converter. More than 2600 RPM would be a slipping transmission if I remember well. I did watch...