OKI B4300 All About this machine Error Code: All codes 001 002 003 004 005 006 007 008 009 010 011 020 030 034 035 040 041 042 043 050 051 063 070 072 073 074 075 076 077 102 103 106 120 121 122 123 124 125 130 134 143 163 170 171 172 173 179 180 182 187 190 200 201 202 203 204 205 206 207 208 210 211 212 213 Code: 020 Description: CU ROM Hash Check Error 1 Remedy: Error Code Service Mode, Troubleshooting Parts Catalog Compatibility Downloads Files Home Email: Password: Sign In New Register Forgot Password? Send message to us