Legal Question in Personal Injury in California

2 years from the date of the injury upon reasonable discovery of the injury. But, please do so as soon as possible. Since you are under 18, you would have to sue through a guardian.

Also, that was the general rule. As a minor, you also have an additional 12 months after your 18th birthday to sue. Again, sue as soon as possible since evidence will generally be easier considering people tend to forget and it will look questionable that you are suing years after an accident.