P2196..Oxygen Sensor Signal - Biased / Stuck Rich

[0396]

Okay, quick question for the S/4 brain trust.
Last month, my S/4 tossed the above code. I search and inquired of answer - it directed me to change out the first / upper 02 sensor. I ended replacing both banks and the CPS.
This morning while getting on the freeway, the code .
So question to the resident experts...1) Is there a disconnect in the wiring ? 2) is the new 02 sensor I bought from our host already bad...I tend to think no.
Suggestions please.
Thanks in advance for your assistance.

[0396]

Guys, 58 looks / reviews and no suggestions -:(.
Again, the code originally pointed to upper most 02...of with I changed the other 02 along with CPS as a preventive measure.
Car has 78k in her.
Starts up with no rattle - runs great...Except this CEL!
Suggestion?
Thanks


Jake ?.

[RPMtech147]

That code is for Bank 1 sensor 1. You replaced bank 2 sensor 1. Sounds like you replaced the wrong sensor. Hope you didnt throw away the sensor for b2s1.

[JimmyBones]

Are you getting any other codes? What are you seeing for channel 32 MVBs?

That code is for Bank 1 sensor 1. You replaced bank 2 sensor 1. Sounds like you replaced the wrong sensor. Hope you didnt throw away the sensor for b2s1.

From his other thread:

Ok...update! I spent most of the day to install the following ( thanks to those that assisted in identifying location)
: two upper O2 sensor....not too bad of a task
: New diff and trans fluid.
: Warning on the CPS.....it's hidden - even though some had suggested to remove the CV cover and possible R&R from there.
Based on location, one can ONLY feel for the 5mm socket bolt.
I even called & email JH for some support - as it's where I purchase the parts.,..still waiting for support.
So in an effort of " while I'm there" kind of attitude .....I gave up and used the OEM that's in the car....again, I figure why not.
I have to give it to those Audi Techs that do this day in day out...as I simply could not gain access.

Thanks again for those that assisted....at least I know where the CPS is now.
Enjoy your week.

[0396]

Okay, thanks to all that responded. In the meantime, I surf the Web regarding this code. One thing stood out. .vacuum leak-:(. Last December I had the dealer install a complete intake manifold. Tonight, I took out my star socket to " check" if manifold bolts were loose..they were finger tight-:(!. I tighten them all a bit. Ran the car and so far no CEL...ya. I think it was running lean and the 02 pick it up and trigger the injectors to run rich on #1 bank. . I will report back in a few weeks of outcome. .thanks again all

[0396]

Update. I took a 259 mile drive today. The CEL reappeared. So off to the dealer next week for diagnosis and repair. Well I tried to save $ -:(.

[ccollins550]

Update. I took a 259 mile drive today. The CEL reappeared. So off to the dealer next week for diagnosis and repair. Well I tried to save $ -:(.

Any update on what the dealer said? I have a feeling it is the vacuum hose under the intake manifold on my S4.