CSU’s still require that you pass all your a-g courses with a C or better, however, they have a lower requirement for the # of years of Math required from 3-4 for the UC’s versus 2 years minimum for the CSU’s.
This is from the CSU mentor website regarding not passing an a-g course:
If you earned D grades in some of them, you have several options to make up these courses and qualify for CSU admission. You can complete appropriate high school courses with a grade of C or better either in summer school or in adult school. Courses in this category must be those found on the high school or adult school UC “a-g” course lists. Some adult schools may not have a-g course lists.
You may also complete college courses with a grade of C or better in the missing subject areas. Finally, you can earn an acceptable score on examinations such as the SAT subject examinations, Advanced Placement examinations, or International Baccalaureate examinations.
If you are unable or do not choose to make up your subject deficiency, you may earn at least 60 units, including 30 semester units of general education from a California Community College or other college and transfer as an upper-division transfer student, where only your college performance is considered for admission