Too much Oxygen for Smog
 

I have a forum member helping, but other input is always welcome.
I have 2 days to pass smog, initially it was too rich and carbon. Air pump was shorted. Fixed it.
Now it is reading too much oxygen. Exhaust has no holes I can see. Hoses are all connected aside from one from the airpump to air box. Passed without that one before.
Any ideas? Trying to get this thing registered under my name and on the road, but smog is required here in sunny Hellifornia.

Failed smog because exhaust is too clean. Should be easy to find a smog in socal for around 400 bucks.

That's a first! Probably because the probe isn't mounted correctly and it thinks you're cheating by keeping it in open air. Equipment or user error by the tech.
How are the other numbers?

Other #s are good. Took it back in and it passed this time...
I think you are right about the probe...

They check oxygen to make sure you aren't just pumping a lot of air through to dilute the exhaust.

it funny because Mazda kind of did...

Not really though. They dumped air in the exhaust to continue to burn off all the fuel that didn't burn in the engine because it's hard to get a rotary to idle and light cruise at stoich, so they figured they could just make the exhaust stoich even if all the air wasn't going through the throttle body.

It's kind of funny, Chrysler for years and years was too cheap to use a MAF sensor, but when they had to use air injection on some applications in the OBD-II era, they stuck a MAF hotwire in the air pump's outlet hose.