In some cases, they can help you with 'personal' codes (which may have been set by a previous owner), but they will direct you to the vehicle OEM for a 'factory' code.
N'ọnọdụ ụfọdụ, ha nwere ike inyere gị aka na koodu "onyeonwe" (nke nwere ike ịbụ na onye nwe ya nweburu ya), ma ha ga-eduga gị n'ụgbọ OEM maka koodu "ụlọ ọrụ."