Could on-vehicle CO2 catalysis cut down on global warming?

[jeff47]

10. If you aren't cutting fuel consumption, you're producing more CO2.

Because CO2 (and water) is the end result of fuel consumption. Including burning CO.

Given ALL THAT, if we were to approach this strictly on a CO2-reduction basis, would installing a CO2 catalytic converter in a car, and piping the CO it creates into your intake manifold, reduce the amount of carbon dioxide the car makes by a noticeable amount?

No. It would increase the amount of CO2 the car makes.

Something has to supply the energy to convert CO2 into CO. And heat of exhaust isn't enough energy. On top of that, you can not recover all of this energy by burning the CO.

The only energy source available is gasoline. So to get the extra energy to make the CO, you have to burn more gas, releasing more CO2 than if you did nothing.

You are attempting to propose a perpetual motion machine.