Smoke and water from catalytic converter?

This is written this way to try to be as detailed as possible.

I have white smoke comming from the cataltic converter. The converter is underneath the valve where you would add transmission fluid. I see no leak on the valve. It is not steam but smoke.

The smoke is burning smell not sweet more like a rubber type of burning smell.

The smoke starts when the engine is midway on the temp guage and as i hit the accelrator naturally more comes out.

catalytic converter?

my car enginge does not run on either gas or diesel. do i still legally have to use a catalytic converter since im running on hydrogen and there is no pollution just oxygen and water come out of the exhaust

Does this mean I need to have my Catalytic Converter replaced?

I have a 2003 Toyota Matrix with nearly 90,000 miles on it.

In Feb, I was on a road trip and happened to notice I was running low on gas. I had just hit a stretch where there were no gas stations and by the time I got to one, my check engine light was on and my 12 gallon tank took 13.08 gallons of gasoline.

I drove a few hundred miles with my CEL on before I figured I better get it checked. I went to Autozone and the guys said they thought the problem was probably with my fuel system, maybe an O2 sensor or something. I told them about nearly running out of gas and they that might have been it so they reset the CEL.