F53 oxygen sensor

That's funny. I just had the first code on our old F53 V10 and it was fuel mixture lean bank 2. I hear it might be O2 sensor as well.

bank 2 running to lean is more likely to be vacume leak on drivers side of engine probley intake manifold gasket sucking air when cold

The reader we used showed the exact sensor giving the trouble but I don't remember which one. I believe it was a downstream sensor. I'll reread it tomarrow and let you all know.

allbrandauto wrote:
bank 2 running to lean is more likely to be vacume leak on drivers side of engine probley intake manifold gasket sucking air when cold

I'll check that out next time I am at the coach. Thanks for the lead! I did notice that as I did more searching on the internet, the O2 sensor was less of a possibility.

The engine was quite warm when the code popped up. Hopefully the leak point will be evident....

that leak is realy not that evident its very small in my shop we use a smoke machine that when engine is off we put smoke in the intake manifold and look to see wear the smoke comes ouy