ASE® L1 Exam Prep

Download the top-rated ASE L1 app and study anywhere, anytime.

Study Online Start for free today

ASE Advanced Engine Performance Specialist Certification Test (L1) Guide

The ASE Advanced Engine Performance Specialist (L1) Test is designed to measure a technician’s knowledge of the skills needed to diagnose emission failures and driveability problems on computer-controlled engine systems. It is an extension of the basic repair and diagnostic skills tested on the Automobile Engine Performance (A8) test. To register to take the L1 certification test, you must have passed the ASE Engine Performance (A8) Test.

A. General Powertrain Diagnosis
B. Computerized Powertrain Controls Diagnosis
C. Ignition System Diagnosis
D. Fuel Systems and Air Induction Systems Diagnosis
E. Emission Control Systems Diagnosis
F. I/M Failure Diagnosis

ASE<sup>®</sup> L1 Exam Prep

App At A Glance

  • 200 Practice Questions
  • 6 Content Subjects
  • 350 Happy Users

Create Custom Exams

In three simple screens, you can choose your study mode, content areas, and how many questions you want to take. Personalized practice will increase your learning ability.

Detailed Settings
  • Show Flagged Questions Only
  • Number of Questions 0
You can attempt a maximum of 100 questions per test.
Buy Exam

Detailed Explanations

Our answer rationales are written to effectively teach you the material. We even explain why the distractors are incorrect choices so you can fully master the concepts.

Which of the following is most likely to cause an O2 sensor low voltage code?
  • A recessed valve seat
  • A leaking fuel injector
  • An open O2 sensor heater circuit
  • A faulty PCM
View Explanation

Track Your Progress

Track your progress with detailed exam results and cumulative history charts. Analyze your past scores, the time taken to complete a test, and knowledge area strengths and weaknesses.

ASE® L1 Cumulative Stats Recent Test Scores
82% 31% 53% 34% 91%
Average Score 64%
Exams Taken 12
September 28, 2017 at 2:57 PM 91%
September 27, 2017 at 10:17 PM 34%
September 27, 2017 at 4:29 PM 84%

Study on any Device

Study on any device and store exam history in your Pocket Prep cloud account. Simply log in to your account and pick up where you left off!

Download the app and start studying for free today.

Study Online Start for free today
No Internet Required

Study anywhere, anytime. Open the app on your mobile device to get started.

Study Modes

See answers and explanations as you go or simulate an official exam by waiting until the end.

Study Reminders

Schedule daily study time that fits your busy schedule and never forget to study.

Question of the Day

Finding motivation to study can be tough. Challenge yourself with a new QOTD each day.

In-App Support

Reach us through the app and enjoy personalized support. Let us help you succeed!

Always Affordable

Pass your next exam without breaking the bank. Start studying for free today!

*Disclaimer: Pocket Prep, Inc. is not affiliated with or endorsed by the ASE®. Accordingly, the ASE makes no representations regarding the content of Pocket Prep, Inc. materials. All organizational and test names are trademarks of their respective owners.