Section 1798.192 covers that:

    Any provision of a contract or agreement of any kind that purports to waive or limit in any way a consumer’s rights under this title, including, but not limited to, any right to a remedy or means of enforcement, shall be deemed contrary to public policy and shall be void and unenforceable

Edit: I suppose that I should say that I'm not a lawyer. This isn't legal advice. And it's completely possible that I have misunderstood this section of the law.