Best Diagnostic Scanners for Heavy Duty Trucks – 2022 Buyer’s Guide

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Do you need an effective heavy-duty truck diagnostic scanner? 

An efficient diagnostic scanner is helpful in detecting problems and helping you repair them yourself. However, with so many options available, you have to spend an ample amount of time digging deep. 

Make your way through this article in order to know the details of our favorite products with the associated pros and cons to save your time.

Comparison of the Best Heavy-Duty Truck Scanners

  • Clears codes like a pro in just a few seconds
  • Best overall for being a plug-and-play model
  • Provides a prompt notification if any fault is found
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  • Capable of detecting many codes in the vehicle
  • An auto-scan tool that serves the user flawlessly
  • Compatibility with all heavy-duty trucks makes it the runner-up
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  • Provides a detailed diagnostic report of problems
  • Best for the money model that is compatible with class 8 diesel trucks
  • Comes with both 6-pin and 9-pin cable for enhanced vehicle compatibility
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  • Fast and accurate diagnostic reports
  • Capable of offering multisystem diagnostics
  • Suitable for heavy-duty trucks and light cars
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  • Auto-scan feature to offer accurate results
  • Compatible with gasoline and diesel trucks as well as cars
  • Bluetooth connectivity to save the user from the hassle of long cables
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What is a Diagnostic Scanner and What is it Used for?

A diagnostic scanner is basically an electronic service tool. It is commonly used for diagnosing and sometimes reprogramming your vehicle’s controls. Most heavy-duty truck scanners available these days are handheld. There is also an incorporation of advanced technology to detect and later fix problems quite efficiently.

These are used by professional mechanics as well as common truck owners to access active codes and get reports about the working conditions of the vehicle. Moreover, certain diagnostic tests are run by employing these code readers to look for any faults and discover solutions to avoid any likely incident.

What Makes These “Heavy-Duty”?

There are several code scanners available in the market. However, not all of them are suitable for every vehicle. Some of them claim to be ideal for light vans and cars, while others are good for heavy vehicles. A heavy-duty scanner provides information about the performance of trucks quite efficiently.

Heavy-duty scanners are equipped with many advanced features that make the process of repairing trucks a seamless one. Unlike some other models, these are capable of supporting almost all systems in your truck and provide a prompt signal in case of any problem.

How Do I Choose a Diagnostic Scanner?

When it comes to the best heavy-duty truck diagnostic scanners, different manufacturers offer a number of models on the market. This makes the decision quite hectic. Well, we are here to help you. In this section, we have gathered a few important features that you need to look for in order to get the right product for you.


Several brands available in the market claim to provide the best equipment. Therefore, you should go for a brand that has a good reputation and provides impressive customer service to enhance your experience.

Ease of Use

Many heavy-duty scanners these days come equipped with advanced technology. Therefore, it is better to look for a model that has all the desired features and is also user-friendly. For example, a few models have Bluetooth connectivity to allow easy diagnosis.


You must opt for a product that comes with an impressive warranty. This will not only add reliability to the product but will also bring value to your bucks.


Another important feature to look for while making a purchase is if the model has a big screen. A big screen will allow you to view diagnostic reports easily. Plus, it can offer a better understanding. Similarly, there are certain models on the market featuring a touchscreen to enhance usability.

Quick Take - Best Heavy-Duty Truck Scanners

In a hurry? Here's a snapshot of the best heavy-duty truck diagnostic scanners:

  1. OTR Performance Detroit Diesel
  3. Kzyee KC601

Review of the Best Heavy-Duty Truck Scanners

Now that we are done with major features that make for a great heavy-duty truck diagnostic scanner, let’s move to the review of our top-picked products. Read on to find the best model that suits your demands.


  • Easy to install and use
  • Capable of resetting fault codes
  • A solid design that is built to last long
  • Allows you to replace engine-related sensors
  • Equipped with many top-end features to serve users


  • Relatively less coverage
  • Instruction manuals are not impressive
  • Not suitable for people on a tight budget

What Recent Buyers Report

This product is quite popular among its customers for a number of reasons. Most of its customers are owners of heavy trucks and what they appreciate about it most is its easy installation. You just need to plug in the equipment and it’s all ready to serve you completely.

Why it Stands Out to Us

If you want a great heavy-duty truck scanner, then you must grab the OTR Performance Detroit Diesel. This product will surely end your search with its exceptional features. Being a plug-and-play scanner, it is very easy to use. Moreover, it claims to be perfect at clearing the fault codes in the vehicle.

Who Will Use This Most

With a solid design and many features, this model is surely a great choice for any truck owner. It is particularly a good option for truck drivers who go to various destinations. Once installed in your vehicle, this equipment will save you from any worry and possible mechanical failures.

Bottom Line

An extraordinary product capable of flawlessly clearing all the active and inactive fault codes in your vehicle, the OTR Performance Detroit Diesel should not be missed. Its users are very happy with this model, plus the robust design is meant to serve you for a long time period.


  • Offers wide coverage and support
  • A great design that is user-friendly, as well
  • Backed by a 2-year warranty to mark reliability
  • Comes with a DTC library ​to understand the codes
  • Equipped with a DPF reset for the removal of dirt from filters


  • Suitable for a certain range of trucks
  • A few complaints of misreading codes sometimes
  • Not equipped with all features for certain vehicle models

What Recent Buyers Report

Like our best product, this runner-up model is also admired by users. What users particularly love about this model is its compatibility with a number of models that save them from frequent purchases. Moreover, another attractive point is that it comes with a two-year warranty that is appealing to many customers.

Why it Stands Out to Us

A great product from NEXAS, the LUMNX-NL 102P is best known for being compatible with many truck models. It supports multiple car systems, including engine, ABS, SRS, and braking systems. Moreover, the built-in DTC library helps the user to fix some minor problems by providing a detailed description of the fault.

Who Will Use This Most

Being a good diagnostic tool, this model can be used by many truck owners. It is simple to use and understand and is therefore, suitable for many beginners, as well. As it offers details about the fault, you can simply fix the problem yourself when there is no workshop nearby.

Bottom Line

The NEXAS LUMNX-NL 102P is equipped with many amazing features that make it the runner-up on our list. It not only shows support for many truck models but also gives solutions to some minor faults to add onto perfection. With this product, you can get access to many systems at a time in your vehicle.

Best for the Money:
Kzyee KC601


  • Easy to use interface
  • Offers free updates to its users
  • Comes with a 2-year warranty, making it reliable
  • Impressive customer support to get help for whenever you’re stuck
  • Equipped with a 6-pin and 9-pin cable for providing maximum support to the vehicle


  • Not suitable for MAC
  • Do not support DPF Regen
  • Only recommended for class 8 trucks

What Recent Buyers Report

Users have many positive reviews about this model. The most striking part is its affordable price along with many exceptional features. Moreover, it is backed by a two-year warranty that is quite impressive. Although there are some concerns over its compatibility with only class 8 trucks, it is a great model to bring value to your bucks.

Why it Stands Out to Us

The Kzyee KC601 mainly stands out to us for providing a detailed description report. It gives all the information about the problem as well as has constant updates about the working conditions of the truck. The details include fuel economy, engine speed, vehicle hours, distance, and much more. To add on, it comes with a user manual that is easy to understand.

Who Will Use This Most

It is thought to be an ideal choice for those people who do not want to spend much money on a diagnostic scanner. Since it is equipped with many top-notch features, it can be used by most truck owners. Moreover, it can be used by anyone who likes to have constant updates about vehicle performance.

Bottom Line

Since not everybody can afford to purchase expensive models, the Kzyee KC601 is a popular choice for people on a tight budget. It is capable of providing detailed diagnostic reports and also comes with an impressive two-year warranty to mark a reliable purchase for many users out there.


  • Very efficient and fast in operation
  • Provides free updates to the users
  • Known for impressive customer service
  • Equipped with 6, 9, and 16-pin adapters
  • Comes with a 2.8-inch screen to provide clear data


  • A bit expensive
  • System gets stuck at times
  • Does not offer any warranty

What Recent Buyers Report

This model has gained many mixed reviews from its customers. First of all, it is highly appreciated for its ability to diagnose problems in many systems. Similarly, another loved feature is its big screen that offers a clear view of reports. However, some users have minor concerns over the lack of any warranty. Yet, it is highly reliable and is a great addition to your vehicle.

Why it Stands Out to Us

An outstanding scan tool, the LAUNCH CReader HD Plus, is surely one of the best heavy-duty truck diagnostic scanners. The reason is its ability to read and erase codes on various vehicle systems, including engine, transmission, and brakes, as well as fuel. Moreover, it lets you pause, playback, and stream your vehicle’s information whenever you want.

Who Will Use This Most

Since this diagnostic tool shows compatibility with many vehicle models, it can be used by heavy-duty truck drivers, as well as light car owners. It offers truck coverage ranging from class 4 to class 8, as well as many OBD2 and HOBD Fords. Its large LCD makes the information quite easy to understand for many customers.

Bottom Line

Another great tool on our list, the LAUNCH CReader HD Plus is extremely useful in detecting problems of systems in your vehicle. It is recommended the most for users working with heavy-duty trucks and cars. With this model, you will get free updates and 6, 9, and 16-pin adapters, as well.


  • Comes with a 1-year warranty
  • 3 different adapters are available
  • Can be operated in multiple languages
  • Comes with a quick guide for efficient performance
  • Offers a wireless connection to add onto perfection


  • A bit heavyweight
  • Relatively expensive than other models
  • Advanced technology can cause confusion for beginners

What Recent Buyers Report

A great product with so many features, the LAUNCH X431 V has received many satisfactory reviews from customers. It is quite admired for offering wireless technology that makes it user-friendly. Moreover, since it can provide information in eight languages, it is quite helpful for users of various regions. Although its high weight could be a problem for some users, it has everything you want in a good scan tool.

Why it Stands Out to Us

Considered as a professional-level diagnostic tool with advanced technology, the LAUNCH X431 V is equipped with the ultimate engine code reader to detect problems in all systems of the vehicle. It offers Bluetooth technology that helps in hands-free diagnosis, making it easy to use. To add on, it displays all the reports on a ten-inch screen that is responsive to touch, as well.

Who Will Use This Most

It is specifically designed for mechanics and professional technicians to diagnose problems in a plethora of vehicles. It shows compatibility with over 220 models of heavy-duty trucks. It is a significant choice for people owning a J1939 or J1708 to get constant information about the vehicle’s performance.

Bottom Line

Using the LAUNCH X431 V, you can diagnose multiple faults in your vehicle’s systems like a pro. It comes with the latest hardware configuration that makes it suitable for professional auto mechanics. The wireless connectivity eliminates the use of any long cables. Moreover, it does not require frequent recharging since the battery has a long life.

Perks of Getting a New Truck Scanner

Investing in a quality diagnostic scanner can be really beneficial to you. Not only can it provide accurate diagnostics reports, but there are also various other advantages associated with a great model. These include:


A great heavy-duty truck scanner shows compatibility with a number of vehicle models. This feature saves the user from purchasing a specific tool for each truck model. Most often, a piece of single equipment will do you fine.

Valued Purchase

These top-notch scanners from reputed brands are meant to last long. They are made of high-quality materials and have multiple functionalities to serve the user in the long run. 

Constant Updates

Different diagnostic scanners offer constant updates, without any additional cost. You get to have all the advanced features without needing to purchase a new version. 

Seamless Repairing

These diagnostic scanners are really efficient in the diagnosis and clearing of codes in various systems. This makes it easy for professional mechanics to detect the problems and fix them without any confusion. Therefore, your truck and other heavy-duty vehicles are all set to work again in almost no time.


If you know how to utilize the diagnostic scanner, you can easily fix the problem in your vehicle. The above-mentioned products are there to ease your task with the advanced functionalities. Now that you know the trending heavy-duty truck diagnostic scanners on the market, make sure you go through our reviews once more to pick the right product.