Fortunately, CSUs admit by major, so if the student gets into the desired major, he just needs to maintain good academic standing (pass courses with C grades). However, changing major may be difficult if the new major is more popular than its capacity (impacted). Changing major may also require taking catch up courses if it is done later.
https://www.calstate.edu/sas/documents/impactedprogramsmatrix.pdf indicates that engineering majors and computer science are not impacted at Chico, Los Angeles, Northridge, and Sacramento.