There are quite a few reasons why a car may be a lemon. For instance, the amount of day's during a specific period of time that it's in the shop being repaired. You can check out more info here:
www.lemonlaw.com
One option is that the manufacturer can offer you a $ settlement to keep the car.
I am not sure if they are in CA but you may find some valuable info there.
1-800-LEMON LAW