What is the limitation period for a plaintiff to sue for damages under the California Motor Vehicle Accident Prevention Act?

that some type of wrongful conduct had occurred. "[A] person need not know of the actual negligent cause of an injury; mere suspicion of negligence suffices to trigger the limitation period." (Knowles v. Superior Court (2004) 118 Cal.App.4th 1290, 1295 (Knowles.) "[T]he limitations period is not triggered when a plaintiff forms an opinion that wrongdoing has occurred. Rather, . . . the plaintiff's mere suspicion of negligence triggers the statute." (Id. at p. 1298, fn. 5.)