You will find a button at the top of this page that gives you access to the complete ASE A9 practice test. Right below this paragraph, we offer you a comprehensive set of practice tests that are specially designed for the Automotive Service Excellence (ASE) A9 exam.
After you have completed the full ASE A9 practice exams, you will know what your strengths are, identify your weak areas, and specifically what you need to focus on to excel in the final exam. To further help you with your exam preparation, you can make good use of the domain quizzes that we have provided, which focus on ASE A9 practice questions in the areas where you need the most improvement.
ASE A9 Domain Exams
The ASE A9 Light Vehicle Diesel Engines exam is a certification test for automotive technicians specializing in diesel engine repair. The exam is divided into various domains, each with a specific focus and percentage allocation. Here’s a breakdown of the different areas of the ASE A9 exam:
ASE A9 General Diagnosis Practice Exam
- Total exam percentage: 15%
- Number of Questions: Approximately 7-8 questions.
- Focus: This section tests knowledge in general diagnostic procedures, including the identification of diesel engine noises and vibrations, and the verification of customer complaints.
ASE A9 Cylinder Head and Valve Train Diagnosis and Repair Practice Exam
- Total exam percentage: 17%
- Number of Questions: Approximately 7-8 questions.
- Focus: This part covers the diagnosis, repair, and service of cylinder heads, valve trains, and related components.
ASE A9 Engine Block Diagnosis and Repair Practice Exam
- Total exam percentage: 22%
- Number of Questions: Approximately 9-10 questions.
- Focus: This area involves the diagnosis and repair of engine blocks, including components like pistons, bearings, and crankshafts.
ASE A9 Lubrication and Cooling Systems Diagnosis and Repair Practice Exam
- Total exam percentage: 12%
- Number of Questions: Approximately 5-6 questions.
- Focus: This section deals with diagnosing and repairing the engine’s lubrication and cooling systems, including oil pumps, coolers, and related components.
ASE A9 Air Induction and Exhaust Systems Diagnosis and Repair Practice Exam
- Total exam percentage: 12%
- Number of Questions: Approximately 5-6 questions.
- Focus: This part tests the technician’s ability to diagnose and repair air induction and exhaust systems, including turbochargers, EGR systems, and DPFs (Diesel Particulate Filters).
ASE A9 Fuel System Diagnosis and Repair Practice Exam
- Total exam percentage: 22%
- Number of Questions: Approximately 9-10 questions.
- Focus: This section is dedicated to the diagnosis and repair of diesel fuel systems, including fuel injection, pumps, and related sensors and controls.
| Exam Domain | Percentage | # of Questions | Description |
|---|---|---|---|
| General Diagnosis | 18% | 9 | Tests knowledge in general diagnostic procedures, including the identification of diesel engine noises and vibrations, and the verification of customer complaints. |
| Cylinder Head and Valve Train Diagnosis and Repair | 10% | 5 | Covers the diagnosis, repair, and service of cylinder heads, valve trains, and related components. |
| Engine Block Diagnosis and Repair | 10% | 5 | Involves the diagnosis and repair of engine blocks, including components like pistons, bearings, and crankshafts. |
| Lubrication and Cooling Systems Diagnosis and Repair | 12% | 6 | Deals with diagnosing and repairing the engine’s lubrication and cooling systems, including oil pumps, coolers, and related components. |
| Air Induction and Exhaust Systems Diagnosis and Repair | 24% | 12 | Tests the technician’s ability to diagnose and repair air induction and exhaust systems, including turbochargers, EGR systems, and DPFs. |
| Fuel System Diagnosis and Repair | 26% | 13 | Dedicated to the diagnosis and repair of diesel fuel systems, including fuel injection, pumps, and related sensors and controls. |
Additional Important Information:
- The ASE A9 exam typically consists of 40-45 multiple-choice questions.
- The total time allocated for the exam is around 1.5 to 2 hours.
- A score of 70% or higher is usually required to pass.
- ASE certification is valid for five years, after which technicians must retake the exam to maintain their certification.
- It’s recommended to have hands-on work experience or formal training in diesel engine technology before taking the exam.
Remember, the specific number of questions and the percentage allocation for each domain can vary slightly with each exam, but the above breakdown provides a general guideline.
ASE A9 Exam Breakdown
The ASE A9 Exam, also known as the ASE Light Vehicle Diesel Engines exam, is a certification test conducted by the National Institute for Automotive Service Excellence (ASE). This exam is specifically designed for automotive technicians who want to demonstrate their expertise in the field of light vehicle diesel engine repair and service.
Here is a breakdown of what the ASE A9 Exam entails:
- Eligibility Requirements: To be eligible for the A9 exam, candidates typically need to have hands-on work experience in light vehicle diesel engine repair. ASE also offers an alternative path for recent graduates of an ASE Education Foundation-accredited program.
- Exam Content: The ASE A9 exam focuses on several key areas related to diesel engines in light vehicles, such as:
- Diagnosis and repair of engine systems (e.g., air induction, exhaust, fuel systems).
- Understanding of engine control systems.
- Inspection and repair of engine mechanical and lubrication systems.
- Cooling system maintenance and repair.
- Format and Scoring: The exam usually consists of multiple-choice questions that test both theoretical knowledge and practical skills. The total number of questions can vary. The exam is scored on a scale, and a passing score is determined by ASE through a statistical analysis.
- Preparation: Candidates often prepare for the exam through a combination of hands-on experience, studying ASE study guides, and completing relevant training courses. Some may also take practice tests to familiarize themselves with the exam format.
- Certification Period: Once passed, the ASE A9 certification is valid for five years. Technicians must retest to maintain their certification.
- Benefits of Certification: Achieving ASE certification, especially in specialized areas like light vehicle diesel engines, can enhance a technician’s professional credibility, potentially lead to better job opportunities, and often result in higher pay.
- Registration and Fees: Candidates need to register for the exam, which can be done through the ASE website. There is a fee for taking the ASE A9 exam, and additional fees may apply for study materials or courses.
- Testing Locations: The ASE A9 exam is offered at various authorized testing centers. Candidates can choose a location and time that suits them best.
To become ASE A9 certified:
- Understand ASE Certification: ASE (Automotive Service Excellence) certification is designed to improve and maintain the quality of vehicle repair and service. It’s a way to validate your expertise and skills in the automotive repair industry.
- Meet Work Experience Requirements: ASE certification requires hands-on work experience. You need two years of on-the-job training. However, if you graduate from certain programs like those offered by Universal Technical Institute (UTI), you can substitute your training for one of those two years.
- Pay the Fees: There is a registration fee and a separate fee for each test. For example, the registration fee is $34, and the test fee is USD 53.
- Prepare for the Test: ASE offers study guides and practice tests. It’s recommended to use these resources as they significantly increase the chances of passing the test.
- Register for the Test: You can register for the ASE A9 test by creating a myASE account. The test can be taken at an ASE test center.
- Pass the ASE A9 Test: The ASE A9 test is focused on Light Vehicle Diesel Engines. It consists of multiple-choice questions designed to measure your knowledge in this specific area. The test is developed by industry experts and is based on real-world scenarios.
- Recertification: ASE certifications are valid for five years. You must take a recertification exam before it expires to remain certified.
These resources provide comprehensive information on the ASE certification process, including the A9 Light Vehicle Diesel Engines certification.
Remember, thorough preparation using study guides, understanding the test content, and practicing with sample questions are key to passing the ASE A9 certification exam.
Our Experience Teaching ASE A9 Candidates To Pass The Exam
Teaching the ASE (Automotive Service Excellence) A9 certification, particularly from a lecturer’s perspective, involves several key aspects. As teachers, we must ensure that the students understand the concepts and can apply them in real-world scenarios. We include a mix of educational skills, technical expertise, and commitment when preparing for the practice exams.
Here are a few key highlights:
- Understanding the ASE A9 Content: The ASE A9 certification is focused on Light Vehicle Diesel Engines. As a lecturer, it’s crucial to have a deep understanding of diesel engine theory, operation, diagnosis, and repair. This includes knowledge of fuel systems, engine performance, emissions systems, and more.
- Curriculum Development: Developing a curriculum that covers all the necessary topics for the ASE A9 exam is essential. This includes creating lesson plans, practical exercises, and assessments that align with the ASE A9 test specifications.
- Practical and Theoretical Balance: While theoretical knowledge is important, practical, hands-on experience is crucial in automotive training. Lecturers need to balance classroom theory with workshop practice, ensuring students get enough hands-on experience with diesel engines.
- Staying Updated with Industry Standards: The automotive industry is constantly evolving, especially with the advent of new technologies in diesel engines and emissions control. A lecturer must stay updated with these changes to ensure the information provided is current and relevant.
- Assessment and Feedback: Regular assessments and constructive feedback are important to gauge student understanding and progress. This also helps in identifying areas where students might need additional support or practice.
- Industry Connections: Maintaining connections with the automotive industry can provide valuable insights and opportunities for students, such as internships, apprenticeships, or guest lectures from industry professionals.
- Motivation and Support: Being a source of motivation and support for students is crucial. Encouraging them through challenging topics and providing guidance can make a significant difference in their learning experience and professional development.
- Comprehensive Knowledge of Light Vehicle Diesel Engines: The ASE A9 certification is specifically focused on light vehicle diesel engines. As a lecturer, it’s crucial to have in-depth knowledge of diesel engine operation, diagnosis, repair, and maintenance. This includes understanding fuel systems, engine control systems, exhaust systems, and more.
- Staying Updated with Technological Advances: Diesel technology is constantly evolving, with new advancements in fuel efficiency, emission control, and electronic systems. Lecturers must stay updated with these changes to ensure the information provided to students is current and relevant.
- Preparation for the ASE A9 Certification Exam: A significant part of the teaching focuses on preparing students for the ASE A9 certification exam. This includes familiarizing them with the exam format, types of questions, and key areas of focus. Lecturers use past exam papers, mock tests, and study guides to aid in this preparation.
- Encouraging Critical Thinking and Problem-Solving: In the field of automotive repair, especially with diesel engines, technicians often encounter unique and complex problems. We encourage critical thinking and problem-solving skills, teaching students to diagnose and troubleshoot effectively.
- Safety and Environmental Considerations: Safety in handling diesel engines and components is paramount, and so is the awareness of environmental impacts. Lecturers emphasize safe work practices and environmental regulations related to diesel engine repair and service.
- Adapting to Different Learning Styles: Recognizing that students have different learning styles, a lecturer might use a variety of teaching methods, including visual aids, interactive sessions, and group discussions to cater to these diverse needs.
- Building a Foundation for Lifelong Learning: Finally, lecturers aim to instill a foundation for continuous learning and professional development. The automotive industry evolves rapidly, and ongoing education is crucial for a successful career.
Our team at Career Employer has carefully crafted the ASE A9 practice exam, bringing knowledge and expertise from experience in participating in, preparing for, and helping over 1000 auto mechanics in passing the exam. Besides, the team consists of highly skilled auto mechanics who boast over a decade of experience. In addition, we offer a range of practice exam versions that help with the diverse needs of our students.
Effective Study Strategies / Methods
To effectively study for the ASE A9 exam, which focuses on Light Vehicle Diesel Engines, here are some strategies and resources that can be very helpful:
- Obtain Study Guides and Practice Tests: Start by getting an ASE A9 study guide and practice test. The National Institute for Automotive Service Excellence (NIASE) provides free study guides for each category of testing on its website. Third-party websites also offer study guides, practice tests, and personalized studying help.
- Take Practice Tests Under Exam-Like Conditions: Simulate the actual exam experience by creating a quiet, distraction-free environment, setting a timer, and completing the practice test within the allotted time. Review the answers and explanations thoroughly to understand why certain options are correct or incorrect, and focus on your weak areas.
- Study Specific Topics Thoroughly: The ASE A9 exam covers topics like General Diagnosis, Cylinder Head and Valvetrain Diagnosis and Repair, Engine Block Diagnosis and Repair, and more. Make sure to get detailed information and step-by-step explanations on these topics from reliable study materials, such as the Motor Age Training ASE A9 Study Guide.
- Track Your Progress: Keep a record of your scores on each practice test to monitor your improvement. This can boost your confidence and motivate you to continue studying.
- Prepare Methodically: Start your preparation early and avoid cramming. Break up your study time into smaller segments and use illustrations and examples to aid your learning. If possible, paraphrase difficult theories and terms into your own words as if you had to instruct someone else.
- Set a Study Schedule: Instead of waiting until the last minute, set a schedule and study regularly in a quiet place. Use workbooks and online resources to research unclear topics.
- Consider Your Career Path: Remember, you don’t need to pass all ASE certification tests. Choose the ones that align with your career goals and interests.
- Registration and Eligibility: Make sure you register for the exam within one of the four yearly registration windows: Winter (Jan 10 – Mar 31), Spring (Apr 10 – Jun 30), Summer (Jul 10 – Sep 30), and Fall (Oct 10 – Dec 31). The registration fee is $36, plus USD 43 per test. Ensure you have the required experience: at least two years of on-the-job training or a combination of one year of on-the-job training and a two-year degree.
- Familiarize Yourself with Question Formats: The ASE A9 exam includes various question types, such as direct or completion questions, true or false, and ‘except and least likely’ questions. Practice understanding and answering these formats to increase your comfort level with the exam style.
- Study and Practice: Utilize study guides and practice tests to prepare. The Motor Age Training ASE A9 Study Guide is one option, offering detailed information on key topics and practice questions. It’s important to focus on areas where you feel less confident to ensure a well-rounded preparation.
- Identify Areas for Improvement: As you go through each task in the study guide, mark the skills you’re unsure about. This will help you identify areas where you need more focused training or review.
- Sample Questions: Practice with sample questions included in the study guides to get a feel for the types and styles of questions on the actual exam.
- Training Resources: The end of each study guide includes resources for additional study or training, which can be crucial for areas you’re less confident in.
- Regular Practice: Consistently practice with sample questions and mock tests.
- Join Study Groups: Engage with online forums or local study groups for collaborative learning.
- Time Management: Develop a study schedule that allows ample time for each topic.
Remember, thorough preparation and understanding of the exam structure are key to success in the ASE A9 exam.
Cost
| Fee Type | Cost |
|---|---|
| Registration Fee | $34 (per order) |
| Standard Test Fee | $53 (per test) |
| Advanced Level Test Fee | $106 (per test) |
| Military TWV Test Fee | $85 (per test) |
| Recertification Test Fee | $53 (per test, capped at USD 159) |
| Advanced Level Recertification Test Fee | $106 (per test) |
| Maximum Recertification Cost | $193 (per order) |
| ASE Renewal App Subscription | $48/year |
The cost of the ASE A9 board certification exam, including various fees, is detailed on the official ASE website and other relevant sources. Here’s a breakdown:
ASE A9 Certification Exam Costs
- Registration Fee: $34, paid with each order.
- Test Fees:
- Standard Test Fee: $53 per test.
- Advanced Level Test Fees (e.g., L1, L2, L3, L4): $106 each.
- Military Tactical Wheeled Vehicles (TWV) Test Fees: $85 each.
- Recertification Test Fees:
- Same as initial certification: USD 34 registration fee and USD 53 per test.
- Advanced Level Recertification Tests (L1R, L2R, L3R): USD 106 each.
- The total cost for recertification tests is capped at USD 159, regardless of the number of tests. So, the maximum one would pay for recertification in a single order is USD 193.
Additional Costs
- ASE Renewal App: For those certified in A1-A9, a subscription to the ASE Renewal App is available for $48/year. This app provides monthly questions for recertification.
Testing Details
- Testing Availability: ASE testing is available year-round.
- Testing Period: Upon registration, you have 90 days to schedule and take your test.
- Testing Appointments: These can be scheduled for various dates and times, subject to test center availability.
Study and Training Costs
- Costs for study materials and training courses can vary widely depending on the provider and the type of training or materials chosen. These are not specified on the ASE website but can be significant.
Reliable Study Materials and Resources
To prepare for the ASE A9 certification exam, there are several online resources available:
- ASE Official Website: The National Institute for Automotive Service Excellence (NIASE) offers free study guides for each category of testing, including the A9 exam. These guides are available as PDF files on their Test Prep & Training page. They also provide practice tests, although these are not free. Prices vary based on the number of tests you purchase. The practice tests are half the length of the actual exam and include a performance report.
- Pocket Prep: Pocket Prep provides exam preparation for the ASE A Series, including the A9 Light Diesel exam. They offer practice questions written by industry professionals based on the latest exam outlines, and each question comes with a detailed explanation. This might be a great way to turn weak spots into strong spots.
- Motor Age Training: The ASE A9 Light Vehicle Diesel Engines study guidebook and practice test by Motor Age Training offers detailed information and step-by-step explanations supporting the topics technicians are expected to face during the ASE A9 certification exam. It includes general diagnosis, cylinder head and valvetrain diagnosis and repair, engine block diagnosis and repair, and several other topics.
- The Group Training Academy: This platform offers a comprehensive array of training materials and resources related to automotive repair and ASE test preparation, including for the A9 Light Vehicle Diesel Engine certification. Their resources cover various topics from brakes and electrical systems to engine specifics.
- Tests.com – Free ASE A9 Practice Test: This resource offers a practice test for the ASE A9 Light Vehicle Diesel Engines certification. The test covers various components such as Cylinder Head and Valve Train, Engine Block, Lubrication and Cooling Systems, Air Induction and Exhaust Systems, and Fuel Systems. The practice test is written by Dr. John Kershaw, an ASE test prep expert.
- ASE Study Guides – Automotive Service Excellence: ASE provides official study guides that can be very helpful for exam preparation. These guides offer detailed insights into the topics covered in the ASE A9 certification exam.
- Mechanic Career Now – ASE A9 Diesel Mechanic Practice Test: This is another resource offering practice tests for the ASE A9 Diesel Mechanic certification. It’s a great way to test your knowledge and get familiar with the exam format.
- Tests.com – ASE A9 Practice Test
- YouTube – ASE Test Preparation Tips: ASE Test Preparation Video
- Reddit – Automotive Training Forum: ASE Test Discussion on Reddit
- YouTube: A9 Light Vehicle Diesel Test Prep: This YouTube video might provide visual and auditory learning materials for the ASE A9 exam.
- VehicleServicePros.com: Tips and Tricks for ASE Certification Test Taking. This article explores various tips and strategies for taking ASE certification tests, which could be beneficial after completing your ASE A9 exam.
These resources should provide a comprehensive preparation for your ASE A9 certification exam. Good luck with your studies!
Tips for Exam Day
- Understand the Test Format and Content: The ASE A9 certification is focused on Light Vehicle Diesel Engines. Have a deep understanding of diesel engine theory, operation, diagnosis, and repair. This includes knowledge of fuel systems, engine performance, emissions systems, and more.
- Physical and Mental Preparation: Ensure you’re well-rested, hydrated, and have eaten a decent meal before the test. Being physically prepared can significantly impact your mental performance.
- Time Management: Don’t spend too much time on a single question. If you’re unsure, flag it and move on. This approach helps you cover more ground and return to difficult questions later.
- Practical Knowledge: While theoretical knowledge is crucial, practical understanding, such as the correct sequence for brake bleeding, is also tested. However, remember that some questions might not be as straightforward due to variations in vehicle models.
- Test-Taking Strategy: Pay close attention to questions formatted as “Tech A says _, Tech B says _”. These can be tricky and require careful reading.
- Mindset and Attitude: Remember, taking the test itself is an achievement. Even if you don’t pass on your first try, you gain valuable experience and insight into the test format.
- Relax and Stay Positive: Remember, it’s common for technicians to not pass the ASE exam on their first try. If you don’t succeed initially, use it as a learning experience and continue studying. There’s always an opportunity to retake the exam after 30 days, albeit with additional registration fees.
- Start with Easier ASE Tests: If you’re planning to take multiple ASE tests, it’s recommended to start with easier ones like the A5 to get accustomed to the question types and exam format before moving on to more challenging tests.
- Test-Taking Strategies: On the day of the exam, remember to read each question carefully and eliminate obviously incorrect answers. Trust your first instinct on answers and ensure you answer every question, as an unanswered question is a guaranteed miss. If uncertain, mark the question and return to it later if time permits.
Post-Exam: Next Steps
If you have just completed the ASE A9 exam or are planning to take it, here are some strategies and next steps to consider:
- Review and Reflect: Whether you’ve passed or are awaiting results, it’s crucial to review the exam content. Reflect on the areas you found challenging and seek additional study materials or practical experience in those areas.
- Utilize Online Resources: There are several online platforms and forums where professionals discuss and share their experiences with the ASE exams. Engaging in these communities can provide insights and tips for both practical applications and exam preparation. For instance, the ASE Test Preparation and Study Guide by James D. Halderman covers ASE areas A1-A8 and offers detailed insights into the exam content, including the A9 section. This guide is a valuable resource for understanding the exam format and the types of questions asked.
- Continuous Learning: Automotive technology is constantly evolving, so it’s important to stay updated with the latest trends and technologies in the field. This can be achieved through online courses, workshops, and reading up-to-date materials.
- Practical Application: Apply your knowledge in real-world scenarios. Hands-on experience is invaluable and helps reinforce the theoretical knowledge gained from studying.
- Prepare for Re-examination (if necessary): If you need to retake the exam, use your previous experience to focus your studies more effectively. Pay special attention to the areas where you felt less confident.
- Networking with Professionals: Connect with other ASE 9 certified professionals. They can provide mentorship, advice, and insights based on their own experiences.
- Plan for Further Certifications: If you’ve successfully passed the A exam, consider preparing for other ASE certification areas to broaden your expertise.
- Post-Exam Analysis: If you don’t pass, use the feedback to focus your studies on areas that need improvement.
These resources should provide a good starting point for your post-exam preparation and strategies for the ASE A9 exam.
References
- ASE Certification Training. “How Much Does ASE Certification Cost? A Complete Breakdown.” ASE Certification Training, https://asecertificationtraining.com/how-much-does-ase-certification-cost-a-complete-breakdown/
- ASE Certification Training. “How to Get ASE Certified: The Ultimate Guide 2021.” ASE Certification Training, https://asecertificationtraining.com/how-to-get-ase-certified-the-ultimate-guide-2021/
- Avion Demand. “ASE A9 Test Prep Study Guide (Light Vehicle Diesel Engines).” Avion Demand, https://aviondemand.com/shop/ase-test-preparation/ase-a9-test-prep-study-guide-light-vehicle-diesel-engines/
- PrepScholar. “ASE Certification Tests: Your Complete Guide.” PrepScholar, https://blog.prepscholar.com/ase-certification-tests
- ExamSocial. n.d., https://examsocial.com/.
- ExamSocial. “ASE A9 Practice Test Free.” ExamSocial, https://examsocial.com/ase-a9-practice-test-free.html
- Mechanic Career Now. “ASE A9 Practice Test – Light Vehicle Diesel Engines.” Mechanic Career Now, https://mechaniccareernow.com/practice-tests/ase-a9-practice-test
- Motor Age Training. https://motoragetraining.com/
- Pass the ASE. https://passthease.motoragetraining.com
- The Group Training Academy. https://thegrouptrainingacademy.com
- ASE. “Work Experience Form Instructions.” ASE, https://workexp.ase.com/FormInstr.aspx
- ASE. https://www.ase.com
- ASE. “ASE Study Guides.” ASE, https://www.ase.com/ase-study-guides
- ASE. “Dates, Fees, and Test Times.” ASE, https://www.ase.com/dates-fees-test-times
- ASE. “Test Series.” ASE, https://www.ase.com/test-series
- Free ASE Study Guides. https://www.freeasestudyguides.com/
- Free ASE Study Guides. “Study Tips.” Free ASE Study Guides, https://www.freeasestudyguides.com/studytips.html
- Pocket Prep. https://www.pocketprep.com
- Pocket Prep. “Taking the ASE A Series? Here’s What You Need to Know.” Pocket Prep, https://www.pocketprep.com/posts/taking-the-ase-a-series-heres-what-you-need-to-know/
- Reddit. “How can I pass the ASE test?” Reddit, https://www.reddit.com/r/automotivetraining/comments/10qct6j/how_can_i_pass_the_ase_test/
- Test Guide. “ASE Certification: How to Get ASE Certified.” Test Guide, https://www.test-guide.com/ase-certification-how-to-get-ase-certified.html
- Tests.com. “ASE A9 Practice Test.” Tests.com, https://www.tests.com/practice/ASE-A9-Practice-Test
- Universal Technical Institute. “Tips for Your Mechanic Path to ASE Certification.” UTI, https://www.uti.edu/blog/tips/mechanic-path-ase-certification
- Vehicle Service Pros. https://www.vehicleservicepros.com/
- Vehicle Service Pros. “Tips and Tricks for ASE Certification Test-Taking.” Vehicle Service Pros, https://www.vehicleservicepros.com/collision-repair/on-the-shop-floor/article/21196490/tips-and-tricks-for-ase-certification-test-taking
- Vehicle Service Pros. “Motor Age Training ASE Test Prep A9 – Light Vehicle Diesel Engine Certification.” Vehicle Service Pros, https://www.vehicleservicepros.com/training-and-resources/ase-guides/press-release/21202854/motor-age-training-ase-test-prep-a9-light-vehicle-diesel-engine-certification
- YourMechanic. https://www.yourmechanic.com/
- YourMechanic. “How to Obtain an A9 ASE Study Guide and Practice Test.” YourMechanic, https://www.yourmechanic.com/article/how-to-obtain-an-a9-ase-study-guide-and-practice-test-by-valerie-johnston
- YouTube. “ASE A-Series Study Guide – Tips and Tricks for Passing the ASE Tests.” YouTube, https://youtube.com/watch?v=dnQYIlSZBjg
