Is a defendant entitled to review the issue going to the question of guilt?

We have reviewed the record on appeal. By entering a plea of no contest in this matter, defendant admitted the sufficiency of the evidence establishing the crime and therefore is not entitled to review of any issue going to the question of his guilt. (People v. Hunter (2002) 100 Cal.App.4th 37, 42.) Without a certificate of probable cause defendant cannot contest the validity of the plea. ( 1237.5; Cal. Rules of Court, rule 8.304(b)(4)(B).) Defendant did not obtain a certificate of probable cause.