How to Obtain an L2 ASE Study Guide and Practice Test

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When you’re first starting out in your mechanic career, it doesn’t take long to realize that the best way to get a good automotive technician job is by attaining Master Mechanic status. Getting ASE certified can boost your earnings potential, and make you more marketable to employers. You’ll need at least two years of experience first, but the extra effort is worth the payoff.

The National Institute for Automotive Service Excellence, or NIASE, is the governing body which tests and certifies mechanics in order to officially verify their skill level. There are over 40 areas of certification, including L2 which is the test to become an Electronic Diesel Engine Diagnosis Specialist. In order to gain this designation, you must first have passed one of the ASE Diesel Engine tests – A9, H2, S2, or T2 – and an Electrical/Electronic Systems test as well – A6, H6, S6, or T6.

The topics covered in the L2 test include diagnosis of:

  • General diesel engine
  • Electronic diesel engine controls
  • Diesel fuel systems
  • Diesel engine air induction and exhaust systems

There are plenty of resources available online to help you prepare, including L2 study guides and practice tests.

The ASE website

The NIASE website is a great resource for preparing for your L2 exam. There are free study guides for each area of expertise available on the Test Prep & Training page. In order to be properly prepared, you also need to download the Medium-Heavy Composite Vehicle Type 2 Reference Booklet, which is a study guide to be used prior to and during the test. This booklet deals with information on the composite diesel engine which is referred to in questions on the exam.

An L2 practice test is also available on the website, in addition to versions for each different certification. These work on a voucher system in which you purchase vouchers which give you a code, and then you use the code to access whichever practice test you need. Vouchers cost $14.95 each for the first one or two, $12.95 each if you buy between three and 24, and $11.95 each for 25 or more.

The practice version is half the length of the real test, and when you are finished you will receive a performance report, telling you which questions you got correct and which you got incorrect. Reviewing this feedback should help you figure out which specific areas you need to study further.

Third-party websites

When you are searching for ways to obtain an L2 study guide and practice test, you’ll quickly realize that there are many aftermarket resources available. It can be challenging to sort out which are useful and which not so much, so be sure to read testimonials. ASE does not endorse or review these programs, however they do maintain a list of companies on their website for informational purposes. Research your options carefully to be sure you’re getting a reputable program with accurate study information.

Taking the test

When you’re ready to take the actual test, there are plenty of options for scheduling. Testing is available 12 months out of the year, and weekend times are available as well. The NIASE provides information on their website regarding finding a testing location and scheduling your exam day. All of the testing is computer based, and there’s even a demo on the website so that you can get comfortable with the format before your scheduled day.

The L2 Advanced Engine Performance Specialist test contains 45 scored multiple choice questions, plus an additional 10 or more questions which are used for statistical data purposes only. The unscored questions are not marked as such, so you won’t know which questions count and which don’t. You will need to answer every question to the best of your knowledge.

The NIASE recommends avoiding scheduling any other testing for the day you take the L2, due to how complex the topic is. As long as you utilize study guides and practice tests and work hard to prepare for the big day, you should be able to attain L2 Master Technician status.

If you’re already a certified mechanic and you’re interested in working with YourMechanic, submit an online application for an opportunity to become a mobile mechanic.


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Arturo

25 years of experience
42 reviews
Arturo
25 years of experience
Volkswagen Tiguan - Brake Pads Replacement (Rear) - La Jolla, California
Arturo was efficient and extremely professional. I'll refer him to friends and family and call him for any issues related to my car. I am very happy with the service!
Kia Forte - Brake Pads Replacement (Front) - San Diego, California
ARTURO is great! very professional , fast, replaced my front brake pads and oil an filter change. everything now works and works well. Brakes have much improved stopping power and engine is smooth and quiet.Arturo is also kind and thoughtful. "Your mechanic" is very fortunate to have Arturo Lopez represent your company. I enthusiastically recommend him and "Your mechanic> as a fine operation Best regards to the Team Peter Marto

Travis

11 years of experience
312 reviews
Travis
11 years of experience
Ford Explorer Sport Trac - Brake Pads Replacement (Rear) - Minneapolis, Minnesota
Travis is great! This is the second time he has come and serviced our truck. I recommend Travis for any service ned you may have!
Subaru Forester - Brake Pads Replacement (Front, Rear) - Rosemount, Minnesota
Thank you Travis for your fast, easy, honest work on my vehicle today!! The first thing you did upon arrival to my home was find me a discount coupon for $50 off my service estimate. You did only what needed to be done in record time. You not only saved me lots of money, but did things in a profession manner. I've been looking for an honest auto mechanic for my whole life and would love for you to be it!! Thank you, thank you, thank you!! You're the best!!!

Scott

32 years of experience
346 reviews
Scott
32 years of experience
Hyundai Sonata - Brake Pads Replacement (Front, Rear) - Denver, Colorado
Arrived on time and worked quickly. Gave me detailed information on his completed work and the details of my car. Answered all of my questions thoroughly.
Lexus IS250 - Brake Pads Replacement (Rear) - Denver, Colorado
Always on time, speedy, professional, and pleasant to interact with. The work is always consistent and we'll done. I can't reccomend Scott highly enough!

Nicholas

9 years of experience
251 reviews
Nicholas
9 years of experience
Lexus GX470 - Brake Pads Replacement (Rear) - Clayton, North Carolina
Nicholas texted me 30 minutes prior to arrival. Showed up on time as scheduled. He confirmed the work that I requested be performed. He completed the work, performed the road tested, and delivered my keys along with recommendations of other work that might be in my best interest. Was very pleasant, professional, and cleaned up after he was done. I was so impressed with the service he performed and the speed at which the services were completed. I have already scheduled a future service with Nicholas and will schedule any and all future repairs with him if he is available.

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