California Lemon Law is a collective term that represents various legal codes. These are broadly prescribed by the Civil Code Section 1790-1790.4 - (Song-Beverly Consumer Warranty Act) and Civil Code Section 1793.22 - (Tanner Consumer Protection Act), statutes by the California Attorney General's Office and others.
Once an attorney has told you under which code your case falls under, you will need to gather the documentation for your vehicle