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A car diagnostic tool is often referred to as an OBD2 scanner and they’re designed to diagnose and clear error codes. OBD2 ports have been standardized in the majority of cars since 1998 and are usually located below the steering column.

The best OBD2 scanner is the Autel Maxisys Pro MS908P, which features advanced diagnostics and ECU programming for professional use. However, it’s fairly expensive and has many complex features that the average car owner won’t use. In terms of value for money, the Bluetooth BlueDriver OBD2 automotive diagnostic scanner is the best alternative.

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Using a car diagnostic tool is fairly straightforward as they simply plug straight into the port. Once a connection has been established, it allows you to check for error codes such as engine management lights, airbag/SRS and much more. Many professional OBD2 scanners even perform real time tests for further diagnostic data.

Table of Contents

  • The Best Automotive Diagnostic Scanner
  • Car Diagnostic Tool Buying Guide

Car Diagnostic Tool Comparison

OBD2 ScannerSuitable ForIncludes Adapters
Autel Maxisys Pro MS908PProfessionalYes
Launch X431 PROSProfessionalYes
BlueDriver BluetoothHome MechanicNo
Innova 3160g BluetoothHome MechanicYes
Autel MaxiDiag MD808Home MechanicYes
Actron CP9690Home MechanicYes
Autel MaxiLink ML619AffordabilityNo
FOXWELL NT301AffordabilityNo
Launch Creader 6001AffordabilityNo
ANCEL AD310AffordabilityNo

For owners of classic cars from 1980 to 1998, they may offer an OBD1 port for diagnostics. However, compared to an OBD2 alternative, they are usually very basic and don’t provide as much diagnostic data. If you own both classic and modern cars, some OBD1 scanners are integrated into OBD2 tools. This makes them even more versatile and compatible with the majority of the vehicles on the road.

Automotive Diagnostics Tools

As technology has improved, so have car diagnostic tools in terms of their compatibility and features. You are now able to communicate with your car using the OBD port via a wired connection to the scanner or to a smartphone via a Bluetooth or WiFi connection.

Below is a list of the best automotive diagnostic scanners that allow you to effectively diagnose errors with your car.

Auto Diagnostic Tool Software

The Best Automotive Diagnostic Scanner

1. Autel Maxisys Pro MS908 Professional OBD2 Scanner

Autel are one of the largest car diagnostic brands in the US that produce scanners suitable for professional to home mechanics. The Autel Maxisys Pro MS908 OBD2 scanner is their flagship model and by far the best professional OBD2 scanner on the market.

In terms of the technical specification, this car diagnostic tool really is quite special. It has an A9 Quad Core 1.40 GHz processor that uses an Android operating system, which is designed to be simple to use. It also has built-in WiFi, 5MP camera, flashlight, 8 hour battery life, 32GB SSD hard drive, 9.7 inch LED touch screen and much more.

Other features and functionality of the Autel Maxisys Pro MS908 include:

  • Read and clear error codes
  • Live data streaming and actuation tests
  • Adaptation and ECU coding
  • Configure display options and set triggers
  • Record and playback of problematic sensor outputs
  • Diagnose vehicles of manufacturers from America, Europe and India
  • Includes various adapters and wires to suit a range of cars
  • TPMS Reset Functionality
  • Reset all service lights
  • Print out reports and graphs
  • Freeze frame data
  • Update car firmware to latest version
  • Flash programming
  • … and so much more

As this OBD2 scanner will mostly be used in professional garages or workshops, it has padding all round to protect it from any heavy impacts. Everything about this car diagnostic tool is high quality and well thought out. There is also 4 versions of the Autel Maxisys Pro, which include the DS808, MS906, MS908 and MS908P to best suit your requirements.

The Autel Maxisys Pro MS908 is the ultimate car diagnostic tool. It can also be made even better with the available add-on features such as the oscilloscope, J2534 reprogramming module and much more.

2. Launch X431 PROS Professional Car Diagnostic Tool

The Launch X431 is a direct competitor of the Autel Maxisys Pro MS908 as both are targeting professional mechanics. The Launch X431 is the cheaper of the two and by far the best looking car code reader within this article with a tablet-like design.

According to the brand, it has the ability to work with the majority of car manufacturers with car specific connectors and adapters for both OBD1 or OBD2 ports. The bundle includes 14 different connectors and other diagnostic standards for cars in the EU and Asia.

Other features of the Launch X431 PROS include:

  • Bluetooth and WiFi connection
  • Reading and clearing error codes
  • Component activation
  • Oil reset service
  • Steering angle calibration
  • Electronic car brake reset
  • Battery testing and maintenance
  • ABS bleeding
  • Electronic throttle position
  • DPF regeneration
  • Immobilizer matching
  • Fuel injector coding
  • … and much more

In terms of the display, the HD 6.98 inch screen is highly responsive and provides excellent feedback for live streaming graphs and other tasks. It also runs on the Android operating system, which is known to be easy to use and update to the latest firmware.

Overall, the Launch X431 is the best alternative to the Autel Maxisys Pro MS908 as it’s cheaper and provides other functions that may be required. It also doubles up as a tablet because it can connect to the internet, play music, take photos and so much more.

3. BlueDriver Bluetooth OBD2 Scanner

The BlueDriver is by far the most popular car diagnostic tool on the market. This is mainly due to the intuitive OBD2 Bluetooth connection that connects with the brands’s Android or iOS smartphone application, which is then used to read and clear error codes.

In terms of using the tool, simply plug the BlueDriver into the port, let the blue light appear and then connect to it via the application. The stored error codes that you diagnose using the BlueDriver are then checked against a database of 6 million verified fixes. If there is a match, the application suggests a fix, which could potentially eliminate hours of research.

Other features of the BlueDriver Bluetooth OBD2 Scanner include:

  • Live data analysis
  • Smog check
  • Freeze frame data
  • Misfire counts
  • View and clear codes
  • Save and export code/reports
  • Vehicle information
  • Real time data

The user interface of the BlueDriver application is intuitive and easy to navigate with graphics that allow you to read data more clearly. There are also no wires whatsoever and it can be easily stored in the car and out of sight as the device itself is very compact.

Overall, the BlueDriver is by far the best Bluetooth OBD2 scanner for a home mechanic to use. It can also be very useful for mobile mechanics to keep with them out on the road for emergency call outs or quick error code scanning.

4. Innova 3160g Bluetooth Car Diagnostic Tool

The Innova 3160g is a mid range car diagnostic tool that can be used with all cars, trucks, SUV and hybrids from 1996. The Innova brand are well-known and are at the forefront of the top automotive multimeters and other vehicle electrical troubleshooting devices.

If you are a home mechanic, you will be able to use this diagnostic tool with ease but there are more enhanced features for you to play around with. The 3160g has also recently been upgraded and now features Bluetooth and a color screen for additional usability.

Other features of the Innova 3160g include:

  • Engine management light diagnostic and removal
  • Erase error codes (including ABS & SRS)
  • Reset oil lights and battery maintenance
  • Stream and record live data
  • Charging system testing
  • 3.5 inch color display
  • Bluetooth via smartphone application

The Innova 3160 series has gone through many variations and has been tested by many professional mechanics. The 3160g is the brand’s most popular car diagnostic tool and a contender for the best car code reader for the money. If you are loyal to the Innova brand, this is the one to go for out of all of the 3160 series and it won’t disappoint.

5. Autel MaxiDiag MD808 Automotive Scan Tool

As mentioned above, Autel are a huge brand in the car diagnostic tool industry with plenty to choose from and the MD808 device is one of their latest models. It has a modern, sleek full color display (800 x 480) and a compact design, which you can comfortable grip in one hand.

The benefit of purchasing an OBD2 scanner from Autel is that you receive a 1 year limited warranty and free updates for life. On top of this, you have the reputable brand backing along with the compatibility of most car manufacturers.

Other features of the Autel MaxiDiag MD808 include:

  • Read and remove car error codes
  • Oil light reset
  • EPB and SAS calibration
  • DPF regeneration
  • Battery management system
  • ABS and SRS
  • Live data graphing
  • Includes heavy duty storage box and adapters

If you are servicing your car and want a diagnostic tool to clear service lights, the MD808 does this and much more. The Autel MD808 is an excellent all-rounder that uses the latest technology to provide great performance and a 6 second load time.

6. Actron CP9690 Trilingual Diagnostic Scanner

Actron are another reputable brand that develop a range of car error code readers and their new and improved CP9690 model is perfect for for home mechanics.

Unlike similar priced alternatives, the CP9690 is also compatible with OBD1 vehicles and includes all of the connectors and adapters you would possibly need. It also benefits from a large LCD screen for easy viewing of graphs and reports.

Other features of the Actron CP9690 Car Scanner include: Portal 2d.

  • Powertrain and ABS coverage
  • Vehicle identification
  • Battery system monitor
  • Battery and oil light reset
  • ABS and airbag light reset
  • OBD1/CAN support
  • Live data streaming

The Actron car scanner is very similar to the Innova 3160g and Autel MD808 in terms of the compact design. However, the capability to diagnose OBD1 cars makes it more appealing for owners of both classic and modern cars.

7. Autel MaxiLink ML619 CAN OBD2 Scanner

The Autel AL619 is the brand’s latest and cheapest car diagnostic tool. It uses a single lead to connect from the OBD2 port to the car scanner and you are up and running. In terms of the compatibility, it’s designed to work with a range of manufacturers from 1996 and newer.

Autel state that this car code reader works on all domestic cars with an OBD port and is able to retrieve both generic and manufacturer specific error codes. However, the majority of people will be using this car scanner to remove basic faults such as the Check Engine Light (EML).

Auto Diagnostic Tool Codes

Other features of the Autel AL519 include:

  • Read and clear stored faults
  • Turn off engine management light
  • Display freeze frame data
  • Show vehicle data and VIN
  • Help guides for errors
  • Graphs and live data feedback
  • Print out data
  • Color display

This is the cheapest OBD2 scanner that performs all of the basics and much more. The average car owner will easily be able to use this error code reader with its intuitive button layout and clear instructions on the color display. It also has the reputable brand backing and a 1 year warranty for complete peace of mind.

8. FOXWELL NT301 Car Code Reader

The Foxwell NT301 OBD2 scanner is another popular device that falls into the budget category. For the average car owner that wants a simple to use car diagnostic tool to remove error codes, the NT301 is a great option that won’t disappoint.

Other features of the Foxwell NT301 include:

  • Read and remove error codes
  • Live vehicle sensor data
  • Turn off engine management light
  • Freeze frame data
  • 2.8 inch wide color display

Overall, the Foxwell NT301 OBD2 is a compact car scan tool that runs fast via the windows operating system and comes with a 1 year warranty for peace of mind. For reading and removing error codes, this fault code scanner is more than ideal.

9. Launch Creader 6001 OBD2 Scanner

Another car diagnostic tool by the Launch brand is their budget option known as the Creader 6001. It’s their cheapest diagnostic tool they produce and is compatible with the majority of 1996 US based manufacturers as well as 2001 EU and Asian manufacturers.

Other features of the Launch Creader 6001 include:

  • View and remove car fault codes
  • 2.8 inch TFT LCD screen
  • Display text in a range of languages
  • 7 intuitive buttons
  • Freeze frame data
  • O2 sensor
  • I/M readiness checks

The Launch Creader 6001 is a cheap diagnostic tool that allows you to simply view and remove car error codes with ease. Launch are known for their premium automotive scan tools but this scanner is suitable for those that want to remain with the brand whilst on a budget.

10. ANCEL AD310 Universal Car Scanner

The Ancel AD310 is the cheapest OBD2 scanner within this article that reads and clears error codes. There aren’t many other scan tools with a brand reputation at this sort of price range. If you opt for an unknown brand, you may be disappointed by its functionality and compatibility.

Other features of the Ancel AD310 include:

  • Read and erase codes
  • Live data
  • Freeze frame data
  • Vehicle identification
  • large LCD display (128 x 64)
  • 2.5 feet long cable

To the average car owner that wants to simply view error codes to tell their mechanic or fix themselves, this scan tool is ideal. The AD310 is simple to use and definitely worth the small amount of money.

Car Diagnostic Tool Buying Guide

The number of different car diagnostic tools that are available to buy is increasing every month. The market is fairly saturated with many OBD2 scanners under $100 being the most popular for the average car owner or home mechanic.

However, there are many people that are professional mechanics or enthusiasts and wish to purchase a premium car diagnostic tool. Equipped with a more capable car scanner, you will be able to do far more than just read and clear codes but also perform modifications, real time tests and much more.

At ProCarReviews, we have been testing OBD2 scanners for many years and currently have over 50 within our garage. To help you make an informed buying decision, we have produced the below guide regarding car diagnostic tools.

Types of Diagnostic Scan Tools


OBD2 scanners come in a range of types with the larger and more powerful being suitable for professionals or enthusiasts. This is because they often come with a larger processor, hard drive and other features. The smaller devices are the cheapest and perform the basic tasks such as reading and clearing error codes.

Depending on the age of your car will be a major factor in which car diagnostic tool is best. Modern cars will have an OBD2 port but vehicles that are made before 1998 (before they were standardized) may have an OBD1 port. Therefore, you may need to purchase an adapter to convert the OBD2 connection to an OBD1.

The term OBD stands for “On Board Diagnostics” and the number “2” refers to the second generation, which is a huge improvement upon the first generation. The OBD1 scan tools aren’t universal and are usually specific to each car and provide completely different codes.

The introduction of OBD2 technology is a huge improvement and the amount of information you can get from a from a scanner is much higher than OBD1 tools. The below image is an example of a OBD2 connection that you will plug in to a port.

OBD2 compatible vehicles can connect to a range of diagnostic tools and provide standardized error codes, which makes researching the issue much easier. However, it’s always worth spending that little bit extra for additional functionality as you may need it one day.

Ease of Use

Older car diagnostic tools are notoriously difficult to use with bland interfaces, poor usability and various wired connections. However, with the advancements of technology, they have become just as easy to use as a smartphone.

For those that have never used a scan tool before, there are thousands of videos on YouTube with mechanics providing detailed tutorial videos. However, these days most brands will provide detailed instructions in the box or online.

Of course, if you are new to using a car diagnostic tool, we highly recommend avoiding the professional devices. These may provide far more details than necessary and you may only want to find out the error code that’s stored on your car’s ECU.

We have trialed many of these OBD2 scanner tools within this article but the BlueDriver really excelled in the ease of use category. Once it has been connected (as shown in the image below), you simply go to the app and perform various checks. You could even leave the BlueDriver connected whilst you are driving and use the application as your very own car HUD to display various real time data.

Why You Need a Car Diagnostic Tool

Owning a scan tool is very helpful when trying to diagnose issues with your car. All you have to do is connect the scanner into the port and you are on your way. It avoids the guesswork and potential to spend thousands on parts and labor.

Scan tools automatically read and analyze the vehicle to provide a detailed list about the car and any codes that are stored. With a wide range of possibilities to choose from, anyone is able to perform various diagnostic tasks. The main advantages of owning a diagnostic scan tool are:

  • Check to see if your car is safe to drive and wont cause any damage
  • Save you money as you will not need to use a mechanics
  • Most recent data and stored codes
  • Scan vehicles before you buy them
  • Add/Modify current features i.e. full window closure
  • Provide real time data

Other Factors To Consider

The amount of car diagnostic tool devices out there will continue to increase but you will want to keep an eye out for their features. From the on screen information to the data storage, these factors can make the difference between an easy to use or terrible scan tool.

If you are opting for a device that runs from an application, we highly recommend checking reviews of the smartphone application. This will give you a strong indication to whether it is compatible with your phone and features work as they should.

We highly recommend sticking to the big brands such as Autel, Launch, Ancel, Actron, Innova, Foxwell and a few others. This will give you complete peace of mind that it won’t cause any damage to your ECU and function as you would expect.


Car diagnostic tools have improved massively over the years due to the modernization of new cars. Without them, you can spend hours finding out issues with your car and potentially spending thousands on car parts that didn’t need to be replaced.

Deciding the best OBD2 scanner for your requirements is dependent upon the type of usage that you intend on doing. For example, if you run a garage or you are a car enthusiast, you really want to be looking at the more premium devices available.

Within this article, we have covered all the best options for professionals, home mechanics and those that are looking for a cheap car diagnostic tool. Considering that most garages charge anywhere between $50 to $100 to diagnose your car, it makes sense to invest in one for yourself.