DTC 21

Flash codes are not as specific as B Codes DTCs. For DTC 21 refer to the following B Codes to diagnose the fault.

B1913 B1913
B1925 B1925
B1933 B1933
B1935 B1935
B2229 B2229
B2231 B2231
B2233 B2233
B2235 B2235