Haynes TECHBOOK: Learn About OBD-II & Electronic Engine Management Systems

rhett michael: Amazing. There is so much helpful information on troubleshooting problems that a normal Haynes vehicle specific is lacking that I would argue that you would be better off buying this and a decent obd2 scanner (Xtool A30M here) and skip the vehicle specific manual unless you are ASE certified. I feel Haynes expects you already know how to use specialty tools and I think it is just too much information and not enough explanation. This book is wonderful. I just got it yesterday and it's awesome. You can just blindly open to any section and bam you have learned something new, if you are a shade tree mechanic like me, a novice to a professional just brushing up on things to stay more efficient than the next tech. I told my mom this morning I wish I had this book years ago. I had to get rid of some nice cars that I couldn't afford to keep taking to a mechanic. I use that regret to fix things myself now and always tell people that I only ask for tools for presents because you will never regret having something that you might not use often but just like insurance you are glad it's there when you need it. This book will save you so much money.

United States on Sep 19, 2023

wills: Good book, maybe beyond me.

United Kingdom on Jul 17, 2023

Amazon Customer: Must have for shady tree mechanic

United States on Jul 09, 2023

Charles: Parfait comme toute cette série de livres techniques.

France on Feb 24, 2023

Lazaro L.: la buena información , de que dispone, muy necesaria , a la hora de colocar un escáner en el vehículo y poder interpretar los códigos.

Mexico on May 20, 2022

Ole Roy: As with all Haynes publications, it is well written and is very helpful in introducing a person to the modern technology and some of the necessary equipment to troubleshoot problems. It has enabled me to make a more informed decision on the purchase of diagnostic equipment.

Canada on Sep 20, 2021

Hale and Hardy: Took the book with me to try out the new OBD1/2 scanner I just bought on my 1995 Jeep. The scanner gave me the code (Low TPS Voltage,) and the glossary and index of the book took me right to the affected sensor and its expected operation and troubleshooting. I was able to pull the part and with a little contact-cleaner got it working better and ordered a new replacement.
Could I have looked it up online? Sure, but having the book gave me exactly the info I needed, on the spot, without running about and sifting through multiple websites to get the right level of detail.

Canada on Aug 03, 2020

Old School: Before buying this book, I bought "Automotive Diagnostic Systems: Understanding OBD I & OBD II," which is the other book that will probably show up if you are searching for books on this subject. In my opinion, this book (Haynes) is infinitely better. There is simply no comparison. In fact, I wish I hadn't wasted my money on the other book now that I have received the Haynes book. I have posted a review of the other book on Amazon.

Now this book is more like it! While the other book was mostly theory and spent far too much time on the history of OBD, the regulatory aspects of it, etc., and was filled with meaningless charts and graphs and loaded with errors while not even showing a single picture of an actual sensor or an under-the-hood" picture, this book (Haynes) is what someone who works on cars really needs. It is loaded with pictures of the actual sensors, showing what they look like, where they should be located, how to diagnose them with tools besides just a code scanner (digital volt meters, vacuum gauges, vacuum tools, stethoscopes, etc.) This book is for people who don't want to just read a code but who want to get their hands dirty and fix the problem. The...

United States on Sep 13, 2012

Placeholder: This product was just received a few days ago. As I begin to read through it's pages, I'm impressed by the amount of information, both regarding OBDII, trouble shooting test equipment and how to use the mentioned test equipment. When you first order/receive this book, you think that it's going be all about OBDII scanner codes. Instead you find a rather complete information set regarding various test equipment and how to apply this gear to what's happening underhood. There's so much information regarding general test equipment and engine repair that I have to keep looking at the cover to see that indeed the book is about OBDII code scanners.

Stating the obvious, today's automobile engines are far more technical than what us old guys worked on in the 50's and 60's. All this technology required abandoning the personal satisfaction of fixing one's vehicle troubles. This book helps bring an old shadetree mechanic up to speed with today's engine technology and between this book and an OBDII scanner, I once again can get back under the hood.

After more time with this book, I'll post more impressions. I gave it four stars but only because I need more time with this book. In...

United States on May 22, 2011