Pretty hard for me to see that working most places. Why would the seller want a restriction on a property they're selling which can only decrease the value of the property? And if you're going to ban junk cars you probably want to ban a bunch of other things too. Congratulations! You've just created a HOA.
I'm pretty sure that's the above commenter's point. You don't need the county to implement some blanket law (that, in my experience as a former Sacramento County resident with family still there, is very inconsistently enforced). If you want to be an insufferable prick who micromanages your neighbors' properties because you're too patently greedy to accept an entirely-hypothetical and negligible drop in your house's value (thanks, by the way, for your contribution to Sacramento's housing crisis! We all appreciate being priced out of homeownership by wannabe investors!), then do what other greedy insufferable pricks in that situation do and form an HOA.