Unlocking the secrets of your car’s health is no longer exclusive to professional mechanics. With the Best Automotive Scanner Tool, you can tap into your vehicle’s onboard computer and understand exactly what it’s trying to tell you. That mysterious check engine light or a nagging performance issue? An OBD-II scanner can be your first line of defense, providing diagnostic insights without the hefty price tag of a garage visit.
Navigating the world of OBD-II scanners can be daunting, especially for beginners. The market is flooded with options, each promising to be the best. Having rigorously tested a wide array of OBD-II scanners, we’ve cut through the noise to bring you a curated list of top performers. Below, we’ll explore the best automotive scanner tools available, discuss how they operate, and decode those cryptic error codes, empowering you to take control of your car’s diagnostics.
Among our top recommendations, the Topdon TopScan stands out for its wireless convenience and surprisingly robust diagnostic capabilities. For budget-conscious users, the Launch CR529, priced around $40, offers exceptional value. And for those seeking a professional-grade experience, the Topdon Phoenix Lite 2 delivers advanced diagnostics akin to what professionals use, albeit at a premium price of $799.
Here are our top picks for the best automotive scanner tools you can purchase right now:
Tom Pritchard
Tom is the UK Phones Editor at Tom’s Guide, covering mobile technology and a passionate advocate for electric vehicles.
Quick Recommendations
Based on our hands-on testing, here’s a quick list of the best automotive scanner tools available. Continue scrolling for detailed insights into each product and what makes them excel.
1. Topdon TopScan: Best Mobile Scanner
Effortless Bluetooth setup and professional-grade features packed into a compact design. Expect comprehensive diagnostics, repair guides, parts listings, and predictive analysis for potential issues.
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2. Launch CR529: Best Budget Scanner
Compact and powerful, the Launch CR529 offers essential OBD-II scanner functions alongside high-end features typically found in more expensive models. Lifetime support and updates add incredible value.
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3. Topdon Phoenix Lite 2: Best Rugged Scanner
Resembling a robust handheld console, the Topdon Phoenix Lite 2 is built for both professionals and DIY enthusiasts. Its rugged design houses powerful diagnostic capabilities ready for demanding environments.
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4. Ancel BD310: Best Dual-Purpose Scanner
More than just an OBD-II scanner, the Ancel BD310 also functions as an auxiliary dashboard display, providing real-time engine metrics. Its sleek design and smartphone compatibility enhance its versatility.
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5. Carly OBD-II Scanner: Best Scanner with Companion App
The Carly OBD-II Scanner’s value is highly dependent on your car make, with optimal performance for VW, BMW, and Ford. Its standout feature is its exceptional companion app, boasting extensive customization and professional-grade testing features.
What Makes These Automotive Scanner Tools the Best?
Why Trust Tom’s Guide? Our team of experts dedicates countless hours to evaluating and reviewing products to ensure we recommend only the best. Learn more about our rigorous testing and review process.
Best Mobile Automotive Scanner Tool
Alt text: Topdon TopScan Bluetooth OBD2 scanner, the best mobile automotive scanner tool, showcasing its compact design.
(Image credit: Topdon)
1. Topdon TopScan
Ideal for Deep Car Diagnostics
Expert Review Link:
Specifications:
- Display/Size: None
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Number of Keys: None
- Warranty: 2 years
- Size: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Extensive automotive diagnostic coverage
- Real-time live data monitoring
- Unique performance indicators
- Maintenance coverage
Reasons to Avoid:
- Bulky transmitter
- Subscription required for some features after the first year
The Topdon TopScan might appear unassuming at first glance, but this compact scanner is packed with features that go beyond your typical Bluetooth OBD-II module. It’s not just about transmitting basic car data to your phone app; the TopScan significantly exceeds the capabilities of its competitors in the same class.
Beyond basic fault detection and I/M Readiness tests, the TopScan excels in performance and efficiency analysis. It can even estimate your car’s horsepower and torque, features rarely found in scanners at this price point. Whether you’re aiming to optimize your vehicle’s performance or ensure its roadworthiness, the TopScan is an invaluable tool for your garage.
Read our comprehensive Topdon TopScan review
Best Budget Automotive Scanner Tool
Alt text: Launch CR529 OBD-II scanner, recognized as the best budget automotive scanner tool, displayed on a white background.
(Image credit: Future)
2. Launch CR529
Top OBD-II Scanner Under $50
Expert Review Link:
Specifications:
- Display/Size: Color/ 2.8-inches
- Bluetooth/Handheld: No/Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Number of Keys: 8
- Warranty: 1 year
- Size: 6.5 x 3.8 x 1.2 inches
- Weight: 11 ounces
Reasons to Buy:
- Affordable
- Lifetime updates included
- Easy pre-inspection report generation
Reasons to Avoid:
- Lacks manufacturer-specific codes
- Feels somewhat heavy
- Limited 1-year warranty
The Launch CR529 is arguably the best value automotive scanner tool on the market. Its affordable price of around $38 belies the extensive diagnostic features it offers. The level of functionality you get for such a low price is truly impressive.
While there are compromises at this price point, such as the absence of manufacturer-specific codes and a slightly heavy feel, the CR529 still delivers essential features. It provides live data, an instant inspection function, and surprisingly detailed insights into your car’s systems. The inclusion of lifetime updates ensures long-term usability without subscription fees.
For users needing professional-grade features, the CR529 might fall short. However, for the average car owner, it’s an excellent, budget-friendly addition to any toolkit.
Read our full Launch CR529 review
Best Professional-Grade Automotive Scanner Tool
Alt text: Topdon Phoenix Lite 2 OBD2 scanner, considered the best professional-grade automotive scanner tool, shown in a workshop setting.
(Image credit: Future)
3. Topdon Phoenix Lite 2
Bridging Amateur and Professional Diagnostics
Expert Review Link:
Specifications:
- Display/Size: Color/8-inch
- Bluetooth/Handheld: Yes/Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Number of Keys: Touchscreen
- Warranty: 2 years
- Size: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Reasons to Buy:
- Professional-level OBD scanning capabilities
- Versatile handheld with Wi-Fi and Bluetooth
- Large 8-inch touchscreen
- Extensive diagnostic tests and live data
- Includes adapters and rugged case
Reasons to Avoid:
- Large, heavy, and can be cumbersome
- Expensive initial investment
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 is a significant investment, priced higher than many other capable OBD-II scanners. However, it delivers exceptional value for its price, serving both amateur and professional automotive diagnosticians equally well.
A standout feature is its wireless operation. The control pad connects via Bluetooth to a receiver in your car’s OBD port, providing unparalleled freedom of movement around the vehicle. While the scanner itself is substantial, it includes a kickstand and robust construction designed to withstand workshop environments.
It offers advanced features like live data graphing, detailed fault information, and capabilities that surpass most budget scanners. Note that firmware updates are included for two years, after which an annual subscription of $495 is required.
Read our in-depth Topdon Phoenix 2 Lite review
Best Dual-Purpose Automotive Scanner Tool
Alt text: Ancel BD310, the best dual-purpose automotive scanner tool, showcasing its compact form factor.
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
A Versatile OBD-II Scanner with Extra Functionality
Expert Review Link:
Specifications:
- Display/Size: Color/2 inches
- Bluetooth/Handheld: Yes/Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Number of Keys: 4
- Warranty: 3 years
- Size: 5.1 x 2.4 x 0.6 inches
- Weight: 5.4 ounces
Reasons to Buy:
- Lightweight and compact design
- Functions as both a scanner and car display
- Handheld and Bluetooth scanning
Reasons to Avoid:
- Minimalist interface
- Small screen size
The Ancel BD310 is a dual-function automotive scanner tool, working as a standard handheld device and connecting to smartphones via Bluetooth. It uniquely transforms into a secondary display within your car, showing key engine metrics in real-time.
Its compact and lightweight design makes the BD310 incredibly portable, easily fitting in a glovebox. The 2-inch screen is admittedly small, and the four-button interface is somewhat basic, but it remains effective for car diagnostics.
The 56-inch cable is ideal for use while working under the hood. The BD310 performs essential functions like I/M readiness checks and provides performance data including coolant temperature, engine timing, and speed.
Read our detailed Ancel BD310 review.
Best Automotive Scanner Tool with a Companion App
Alt text: Carly OBD-II Scanner, recognized as the best automotive scanner tool with a companion app, highlighting its sleek design.
(Image credit: Carly)
5. Carly OBD-II Scanner
Car Compatibility is Key to its Performance
Expert Review Link:
Specifications:
- Display/Size: No
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: No
- Live Data Display: Yes
- Number of Keys: None
- Warranty: Lifetime
- Size: 2.9 x 1.5 x 0.7 inches
- Weight: 0.7 ounces
Reasons to Buy:
- User-friendly interface
- Customization options
- Live data display
- Maintenance and repair support
- Lifetime warranty and updates
Reasons to Avoid:
- Feature availability varies by car model
- App subscription can be costly
The Carly OBD Scanner stands out due to its exceptional companion app. Unlike many Bluetooth scanners with rudimentary apps, Carly provides one of the most feature-rich and user-friendly app experiences available.
Beyond basic diagnostics and check engine light resets, the app offers repair assistance, used car checks, and a lifetime warranty, which is a significant advantage.
However, the functionality of the Carly scanner is heavily dependent on your car’s make and model. Full feature access is best for VW, BMW, and Ford vehicles. Also, to unlock the full potential beyond basic OBD functions, an ongoing subscription is required, which can add to the overall cost.
Read our full Carly OBD scanner review
Other Automotive Scanner Tools We’ve Tested
Innova CarScan Mobile 1000 Review Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a highly innovative Bluetooth OBD-II scanner, inheriting Innova’s impressive features like predictive diagnostics, now in a wireless format. Its incredibly simple setup process makes it a standout Bluetooth-only option.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 (★★★★☆)
Despite being larger than typical Bluetooth OBD-II scanners, the ThinkCar ThinkDiag TKD01 boasts exceptional durability. It offers a wide range of manufacturer-specific error codes and advanced fault-code analysis that can resolve minor issues without needing a mechanic. A $40 subscription is required after the first year.
Read our full ThinkCar ThinkDiag TKD01 review.
Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 is specifically designed for electrical diagnostics, equipped with a built-in multimeter. It excels at detecting electrical faults like burnt wires, shorts, and fuse issues. It also provides extensive live data and pre-inspection readiness checks.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions
What is an OBD-II Scanner?
Automotive scanner tools, also known as OBD-II scanners, are devices that mechanics use to diagnose car problems. Instead of manual inspection, they connect these scanners to your car’s OBD port to access data from the onboard computer.
In their most basic form, OBD-II scanners can read and identify diagnostic trouble codes (DTCs) that your car generates when it detects an issue. More advanced scanners offer real-time monitoring of vehicle systems and can even predict potential future problems.
What is the OBD-II Port?
The On-Board Diagnostics Version Two (OBD-II) port is a standardized port found in almost all passenger vehicles sold in the United States since 1996, Canada since 1998, the European Union since 2004, and Australia, Mexico, and New Zealand since 2006.
This port is your access point to your car’s onboard computer. Various devices can connect to it, including OBD-II scanners, insurance telematics devices, and modern dash cams.
If you’re unsure of your OBD-II port’s location, you can find guides on locating your car’s OBD-II port for North American vehicles and worldwide OBD-II/EOBD port locations.
What is a DTC?
DTC stands for Diagnostic Trouble Code. These are error codes generated by your car’s OBD system when it identifies a problem. OBD-II scanners read these codes to help users understand the nature of the issue. While many DTCs are standardized across vehicle makes and models, some manufacturers use proprietary DTCs unique to their vehicles.
What do DTCs Actually Mean?
DTCs may seem like random combinations of letters and numbers, but they follow a logical structure that can help you understand the type of problem detected.
The first letter indicates the affected vehicle system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character is a number: 0 for a generic code or 1 for a manufacturer-specific code.
The third character specifies the subsystem involved:
- 1: Fuel and air metering
- 2: Injector circuit fuel and air metering
- 3: Ignition system or misfire
- 4: Auxiliary emissions
- 5: Vehicle speed controls and idle control systems
- 6: Computer auxiliary outputs
- 7, 8, 9: Transmission and gearbox faults
- A, B, C: Hybrid-specific propulsion faults
The fourth and fifth characters provide further detail about the specific fault, ranging from 0 to 99.
OBD-II scanners interpret these codes into understandable descriptions, with advanced models offering more detailed information. Further research on Google may be needed, as there are over 5,000 possible DTCs.
Importantly, not all DTCs indicate critical problems. While they can signal major issues, some codes may simply alert you to less severe conditions like a slightly elevated engine temperature.
How to Choose the Best Automotive Scanner Tool for You
If you want to understand your vehicle’s operation or diagnose problems, using one of the best automotive scanner tools is the most effective method.
This is the same technology used by dealerships and repair shops. Why not have this capability yourself? Automotive scanner tools are broadly categorized into two types:
Handheld OBD-II scanners come with an integrated screen and cable for direct connection to your car’s OBD port. Wireless OBD-II scanners plug into the port and connect via Bluetooth to a smartphone or tablet for displaying data.
Regardless of the type, many high-quality OBD-II scanners are available for under $200, with some costing less than $30. Key considerations when choosing an automotive scanner tool include:
- Ease of Setup: A scanner should be easy to set up and use quickly for timely diagnostics.
- Faults and Explanations: The best scanners not only identify faults but also explain their meaning, aiding in DIY repairs or informing discussions with mechanics.
- I/M Readiness Check: A valuable feature for pre-emission test checks, ensuring your vehicle will pass inspection.
- Accuracy: Reliable results are crucial; inaccurate data is worse than no data.
- Size and Weight: Portability is important for convenience and on-the-go diagnostics.
- Live Data: Real-time data monitoring is essential for tracking down intermittent issues.
- Graphs: Visual data representation, especially graphs, can be more insightful than raw numbers.
- Warranty: A good warranty indicates product quality and long-term support. Lifetime warranties are highly desirable.
Choosing the best automotive scanner tool depends on your specific needs. Decide whether you prefer the convenience of a wireless scanner with your phone or tablet, or a dedicated handheld device.
Consider longevity by choosing a scanner with lifetime updates or a robust warranty to ensure it remains compatible with evolving automotive technology.
For handheld scanners, prioritize screen size and clarity. A large, bright, icon-based display enhances usability. Ruggedness is also a factor; consider scanners with rubber bumpers for durability in workshop environments.
Additional features like a built-in multimeter, manufacturer-specific code reading, or PDF export capabilities can also be beneficial.
The affordability of these sophisticated tools, with professional-level scanners available for under $100, makes them a worthwhile investment, often costing less than an hour of professional mechanic labor.
How We Test Automotive Scanner Tools
To evaluate the best automotive scanner tools, I used my 2014 Audi A4 Allroad over several weeks in various driving conditions. Each scanner was connected to the car’s OBD-II port, and its ability to accurately read the Vehicle Identification Number (VIN) was verified.
For wireless scanners, connections were tested with an Apple iPad Pro, Microsoft Surface, and Samsung Galaxy S9+ via Bluetooth or Wi-Fi. Handheld scanners were tested by direct OBD-II port connection, drawing power from the port itself.
Cord lengths of handheld scanners and wireless ranges were measured. With the engine running, engine performance and vital systems were monitored. To test fault detection, the engine’s oil temperature sensor was intentionally disconnected.
The scanner’s ability to accurately report the fault, allow for clearing the code, and reset the check engine light was assessed. The ease of interpreting fault details was also evaluated.
Finally, road tests were conducted to assess live data display, including engine speed, timing, and coolant temperature, noting whether data was presented numerically, graphically, or via gauges.
Understanding fault codes is crucial. All DTCs consist of four numbers and an initial letter:
- Powertrain (P)
- Body (B)
- Chassis (C)
- Undefined (U)
Of the approximately 5,000 available diagnostic fault codes, generic codes (starting with ‘0’ in the numeric section) apply universally to all vehicles, covering common issues like air temperature and throttle position. Manufacturer-specific codes (starting with ‘1’) are unique to specific carmakers and often relate to specialized hardware or in-depth problem analysis.
For example, a P0098 code typically indicates a problem with the engine’s intake air temperature sensor. Conversely, a Ford-specific P1112 code suggests intermittent readings from the intake air temperature sensor, indicating it likely needs replacement.
