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The study aimed at determining the use of on-board diagnostic (OBD) actuators for effective teaching of Petrol Engine Maintenance (PEM) in technical colleges in Nigeria. Two research questions and a hypothesis guided the study. 5 OBD technicians and 58 teachers of Motor Vehicle Mechanics’ Work (MVMW) responded to 14 item questionnaire to answer the research questions. The study was carried out in South Eastern States of Nigeria. The design for the study was the descriptive survey, using Borich’s needs assessment model. Three experts face validated the contents of the instrument. Cronbach Alpha method was used to determine the reliability of the instrument which yielded a reliability of 0.93. Mean and improvement need index (INI) were utilized to answer the research questions while the hypothesis was tested using Analysis of Variance (ANOVA). It was found that teachers of MVMW need improvement in on-board diagnostic actuators. Based on the findings, it was recommended that on-board diagnostic system should be integrated into the skills contents and learning contents of the curriculum of technical education programme.

Competences in On-Board Diagnostic Actuators for Effective Teaching of Petrol Engine Maintenance in Technical Colleges in Nigeria