5 Best Professional Car Diagnostic Tools 2023 [Review]

You might have lots of questions in mind needed to be answered like:

“What is the best professional automotive diagnostic scanner 2023?” – or

“Is there any best scan tool for the money?”

Don’t worry! I’m here to help you decide which scanner meets your needs.

I’ve been trying out nearly 50 professional scan tools in different price ranges. Then finalized my top 5 favorite professional scanners in the review below.

Keep reading to know each scanner’s features and performance capabilities before making a wise choice.

Comparison Table of 5 Best Professional Scan Tools

[Note: Swipe left for full table]

Product	Overall score	Active tests	Service functions	ECU coding
LAUNCH X431 V+	9.0	9.0	9.0	9.0	Check Price
Autel Ultra	9.8	10	9.5	10	Check Price
Autel MK808S	8.0	8.0	8.0	-	Check Price
TOPDON Phoenix Plus	9.0	9.0	9.5	8.5	Check Price
Launch X431 PAD V	9.5	9.5	10	9.0	Check Price

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Table of contents:

1. Autel MK808S: Best for Bi-directional Control

2. LAUNCH X431 V+ Pro: Best for ECU Coding

3. TOPDON Phoenix Plus: Best for Topology Map

4. Launch X431 Pad V: Best for ECU Programming

5. Autel MaxiSys Ultra: Best for Automotive Shop

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#1. Autel MK808S: Best Professional OBD2 Scanner with Bi-directional Control

What Makes Me Like Autel MK808S?

1. Covers a lot of car diagnoses and repairs 

Autel MK808S stands out from other cheaper scanners due to its ability to pull more various trouble codes. 

Unlike cheaper scanners, the MK808S can read factory codes from different vehicle systems, including:

• engine, 
• ABS, 
• transmission, 
• SRS,
• TPMS, etc. 

Additionally, I could use this scanner to pull the brake circuit code that cheaper scanners couldn’t detect.

Regarding other advanced features, Autel MK808S has upgraded to come with active tests. 

You can carry out various functions to command the components like ABS brake, engine cylinders, or any electrical parts. These tests help you a lot in diagnosing and clearing trouble codes.

2. Vivid and responsive live data 

When using the Autel MK808S, it’s easy and responsive enough to read graphed live data.

You can use this feature to point out trouble areas and check the real-time status of your car.

For example, I could check the engine misfires with live data and then know the misfire counts.

3. Affordable price with many advanced features

By using many functions available on the Autel MK808S, the price of this scanner is truly unbeatable.

When choosing Autel, you can rest assured that you’re selecting a high-quality product that will endure.

Furthermore, Autel MK808S represents an upgrade from its predecessor, the MK808. It features enhanced hardware such as Android 11, 4GB RAM, and a faster CPU.

What I Dislike?

1. No manual included

The scanner does not come with a hard copy of the manual, so you must download one online or learn how to navigate it yourself. 

Not a big deal to me, but for anyone not familiar with this type of scanner, it’ll be frustrating.

2. Hard to navigate the menu for beginners

Using the scanner is even harder since the menu isn’t easy to navigate. Many features are hidden, so you have to dig deep to find them.

But once you understand the layout, you can easily use the scanner.

Vehicle Coverage

Before buying Autel MK808S, you should check if it can work on your car.

• Check vehicle coverage page 

Key Takeaway

The Autel MK808S is an ideal choice for car workshops and personal use since it has a wide range of features and is highly versatile and cost-effective. 

#2. LAUNCH X431 V+ Pro: Best Scan Tool for Professional Mechanics with ECU Coding

What Makes Me Like LAUNCH X431 V+ Pro?

1. Accurate bi-directional control

After receiving this scan tool, I tested its bi-directional controls on different OBD2 vehicles. 

Although not all of them function smoothly, I was pretty surprised at the number of functions I could use on some models.

From 2002 to 2020 vehicles, it’s great to have the ability to control circuits like the IAC and electronic EGR. 

Also, I can control other circuits, such as power windows and door locks, purge solenoids, etc.

In addition, 

LAUNCH X431 V+ Pro can support many active tests (depending on specific car models), like:

• transmission solenoids, 
• engine vacuum pump, 
• fuel injectors, 
• set the idle, etc.

And, of course, bi-directional controls help mechanics like me test individual systems or parts in those systems. 

2. The advanced functions are reliable but not universal

LAUNCH X431 V+ Pro allows you to perform up to 35 advanced service functions.

Most of the prominent functions I often use are:

• DPF Regeneration
• IMMO Key
• ABS Bleeding
• Fuel Injector Coding
• Throttle Adaptation, etc.

Yet, those functions are not universally compatible.

For example:

Launch X431 V+ helped me run the ABS motor and did a full auto bleed on a 2010 Honda Accord.

Then, I tried the same feature on a 2007 Toyota Tacoma 4×4 but it didn’t work.

Maybe there will be an update for Tacoma soon.

3. Walk around the vehicle while running diagnostics

One thing I’d like to add is I really like that the LAUNCH uses a Bluetooth connector instead of a cable. 

This makes it very convenient to walk around the vehicle while running diagnostics. 

You can operate away from the car, which is great. 

You can be at the workbench or any location in the vehicle.

What I Dislike?

1. High annual subscription fee

My first concern is that the annual subscription fee is a bit high (~$500) after two years of free updates. 

But I work at a repair shop, so paying a fee each year for newer vehicles is mandatory. 

If your work is on your own or family cars, you don’t need to update every year. 

2. Long battery charging time

Although the battery is sufficient for long diagnostics (4 hours), my biggest gripe is the charging time. 

It takes about 4 or 5 hours to charge 100% from around 20%. 

You have to time your diagnostic process. 

Vehicle Compatibility

From my experience, not all advanced service functions and bi-directional control are available on all vehicles. 

You should check the compatibility on LAUNCH’s website before buying.

Key Takeaway

LAUNCH X431 V+ Pro has most of the features that a professional or an advanced home mechanic would need.

With great bi-directional control, this scanner is a must-have tool for you.

In addition to active tests, X431 V+ Pro is a professional scan tool that can offer many service functions.

#3. TOPDON Phoenix Plus: Best Scan Tool with Topology Map Under $1,500

What Makes Me Like TOPDON Phoenix Plus?

1. Topology map at $1,200

Get a scanner with topology map for $1,200? This is what I like the most about TOPDON Phoenix Plus. 

Topology map is a must-have function if you are busy with a lot of cars in the garage waiting to be fixed. 

With this map, it’s easy to locate the fault in a minute because everything is converted into a color-coded topology display. By clicking on the module, you can promptly identify its underlying cause.

This scanner saved me a lot of time when diagnosing cars!

2. Perform easier diagnosis and repair with advanced functions

With TOPDON Phoenix Plus’s 35 service functions and bi-directional capabilities, you can cover many cars with these helpful functions.

For me, these functions are a big help when I diagnose and fix customers’ cars in the shop. 

Regarding the service functions, I was impressed by its ability to be compatible with many cars. For example, I performed DPF regen on a 2016 Nissan Titan XD, injector coding on a 2010 Buick LaCrosse, and ABS recalibration on a 2013 Ford Explorer. 

About bi-directional control, this function is designed for vehicle-specific subsystems. I can find and test the component inside the hood, no need to tear everything apart.

3. Guided function for VAG cars

If you work on several VAG cars, the Guided Function on TOPDON Phoenix Plus helps you maximize productivity.  

Also, this TOPDON Phoenix Plus scan tool will instruct you through each procedure to perform:

• matching 
• calibration 
• basic settings.

I tested this “Guided Function” by calibrating the steering angle sensor on a 2002 Audi S4. What I have to do is to follow each step on the screen and everything’s done. 

4. 2-year free update

TOPDON Phoenix Plus comes with 2 years of free updates. 

Since using this scan tool, it has undergone over 40 updates within a brief period. The update included new features, the latest cars, and bugfix.

This is just the sweet icings on the cake.

What I Dislike?

1. Expensive annual subscription fee

Actually, this is not a big downside to me. But if you buy this tool for a few cars, the update fee of $545 is something you should consider. 

Despite being unable to use ECU coding and active tests, other functions are still available.

2. Repair Info doesn’t support manufacturer-specific codes

The Repair Info feature provides you with information or an explanation of the generic trouble codes only. 

But if you manually search manufacturer-specific codes, you are out of luck.

Vehicle Coverage

Always check the compatibility between your car with TOPDON Phoenix Plus through the brand’s website. This will ensure to buy the right scan tool that can work on your vehicle.

Key Takeaway

With its Topology map, I can say TOPDON Phoenix Plus defeats most scanners in this price range. It is best suited for anyone who wants to have a quick look at the whole car’s systems. 

Not only that, Phoenix Plus is equipped with advanced ECU coding for BMWs and Mercedes like its competitors.

#4. Launch X431 Pad V: Best Scan Tool with ECU Programming

What Makes Me Like Launch X431 Pad V?

1. Useful topology map

I found this map invaluable since it communicates with all the modules on the vehicle and shows their communication structure.

It lets you see the fault module, DTC definition, and why the DTC came up. Furthermore, the scanner color codes the status of the modules. Thus, it saves time and helps you work efficiently.

2. ECU coding and programming using a smart box

Although I love this feature, I have to admit that you’ll need some OBD2 knowledge to perform them without issues.

One of the best things about X431 Pad V’s ECU programming is that you can download the OEM software from the manufacturer’s server using Smartbox 3.0.

Then it’s easy to replace a vehicle’s software and firmware in the ECU or program new ECUs. 

In addition, you can rewrite code for replaced components, helping you activate or deactivate specific module functions.

3. Covers more vehicles than other scanners

Launch X431 Pad V supports all diagnostic protocols, especially:

• DoIP: E and F Chassis BMWs and new Land Rover/Jaguar cars.
• J2534: Toyota, Honda, Volvo, etc.
• RP1210: HD vehicles
• CAN FD: new vehicles from GM.

Hence it can support more car models than its peers on the market.

4. Excellent design

One design feature I like about the Launch X431 Pad V is the 10.1-inch screen with gorilla glass. It is super responsive, and I can see it even in bright outdoor conditions.

In addition, it comes with a charging dock that uses quick charge technology. 

I also liked the adjustable kickstand, which can rotate 180 degrees and be hung on the steering wheel. 

Moreover, it features a rugged design thanks to an IP65 rating against liquid and dust.

What I Dislike?

1. Can only reprogram ECU for two car brands

Launch X431 Pad V used to offer programming functionality for 20+ brands. Unfortunately, it changed in Nov 2022. 

According to US law, Launch X431 PAD can now only be used to reprogram Mercedes-Benz and BMW.

2. Low battery capacity

The 9360 mAh battery capacity on this unit cannot provide enough juice to run it for a considerable time.

It will be back to be charged in around 3-4 hours, which will be inconvenient for busy auto shops.

Vehicle Coverage

First, check your vehicle’s compatibility with the Launch X431 PAD V here. In any case, you can always email Launch Tech for assistance.

Key Takeaway

Launch X431 PAD V is one of the most functional professional scanners in the $2000+ price range. 

If you’re out for a scanner that can do many OE-level resets and cover most vehicle brands, you’ll like working with Launch X431 PAD V.

#5. Autel MaxiSys Ultra: Best Scan Tool for Automotive Shop

What Makes Me Like Autel Ultra?

1. Innovative 5-in-1 VCMI valued $2,000

Autel MaxiSys Ultra has a 5-in-1 VCMI that I find extremely helpful in meeting busy repair demands. 

It functions as an Oscilloscope, Waveform Generator, Multimeter, CAN Bus Tester, and for VCI connection, with dual Wi-Fi. 

The connection between VCI and the Ultra is fast and smooth. 

Also, thanks to the stable dual Wifi, I downloaded any updates without losing connection to the car.

2. Zooming in and out with topology map

Autel MaxiSys Ultra’s topology map lays out every module it can access and tells you whether they are functioning normally or abnormally. 

In addition, the scan tool takes the map to the next level, as it’s capable of zooming in and out of the topology map.

By tapping on the orange-colored module, I can see fault codes and their definition to understand why they are present. 

It gives me a view of how everything works and improves efficiency to the highest level.

3. Multitasking with split screen

This scanner supports split-screen functionality thanks to its large 13-inch TFT screen. 

Its multi-window operation helps me monitor live data and see the oscilloscope simultaneously. 

I used it to see diagnostic guidance and test components to confirm repairs.

Save me a lot of time!

4. Large battery capacity

Autel MaxiSys Ultra boasts an 18,000 mAh battery that can work for 8+ hours without losing power.

Its battery life is helpful in optimizing time, and I never worry about putting it on the charger all the time.

What I Dislike?

1. Too expensive for personal use

Autel MaxiSys Ultra has lots of super-advanced functions, which are more suitable for busy auto shops. 

If you plan to use it on a personal car or don’t use many of its features, it will be an expensive scanner you rarely use. 

2. Only 1-Year free update

Unlike Launch X431 Pad V, Autel Ultra only comes with a year of free updates. Considering that it costs $1,500 for a one-year update, it’s pretty expensive.

If you don’t want to pay for the update fee, you still have access to available functions on Autel Ultra. Yet, online functions like ECU coding & programming are inaccessible.

Vehicle Coverage

Don’t forget to check if the Autel Ultra works on your vehicles. You can check it on Autel website for further help.

Key Takeaway

Autel Ultra is the best professional car diagnostic tool for busy auto shops. 

If you’re looking for an advanced scan tool to perform fast maintenance and repairs, Autel Ultra gives you VCMI functionality and dependable battery life.

Conclusion

Every scan tool in this review has revealed unique features for different professionals. 

Check my 3 picks:

• Autel MK808S: Best scan tool for the money if you are on a tight budget.
• TOPDON Phoenix Plus: My best choice since it supports many topology map and helps with coding at a reasonable price.
• Autel Ultra: A busy professional in a repair shop should go for it.

Don’t forget to share your thoughts and let me know your chosen scanner in the comments.