Advanced Engine Performance Specialist

Objective: To identify those Technicians who possess knowledge of the skills required to diagnose sophisticated driveability and emissions-related problems on automobiles, SUVs, and light-duty trucks. Test Content: The Advanced Engine Performance Specialist (L1) test contains 50 scored questions focused on the diagnosis of general power-train, computerized power-train controls (including OBD II), ignition systems, fuel and air induction systems, emission control systems, and I/M test failures. Because of the complexity of the L1 test, ASE generally recommends that you NOT register for other tests during the same test session. Composite Vehicle: Many of the questions relate to a sample vehicle using a composite power-train control system featuring computerized engine control technology used by most manufacturers. This vehicle is described in the Composite Vehicle Type 4 Reference document that is provided as an electronic pop-up during the test. Use the link below to download and review this document prior to taking the L1 test. Prerequisite: To register for the regular L1 certification test, you must have passed the Automobile Engine Performance (A8) test. To register for the recertification version of the Advanced Engine Performance Specialist Test (L1R), you must have previously passed the regular L1 test. Recertification: Technicians must retest every five years to retain their certification. The Advanced Engine Performance Specialist recertification test (L1R) is the same length as the regular certification test.