Is a defendant entitled to review any issue that goes to the question of his guilt?

Defendant admitted the sufficiency of the evidence establishing the crime by entering a guilty plea and therefore is not entitled to review of any issue that goes to the question of his guilt. (People v. Hunter (2002) 100 Cal.App.4th 37, 42.) Defendant did not obtain a certificate of probable cause and thus may not contest the validity of his plea. Thus, only issues relating to matters arising after the plea was entered are cognizable on appeal. ( 1237.5; Cal. Rules of Court, rule 8.304(b)(4).)