English language has become a global language that is widely taught as a foreign language all over the world. The aim of Teaching English as a Foreign Language (TEFL) is to enable learners communicate through English. Any failure in achieving this aim needs investigation and quick response. This study aims at identifying the causes of Sudanese tertiary students low English language proficiency and the possible actions to be taken to deal with these causes. The study adopted open ended questionnaire to collect data. A total of 180 participants took part in the study. Results reveal that the Sudanese university students' low level of English language is caused by the context, teachers, general education, curriculum, and the students themselves. The respondents suggest that dealing with these factors could be through review of government and universities policies toward English language, teacher training, curriculum review, and raising students' motivation.