The best OBD scanners are essential tools for modern car owners, acting as a window into your vehicle’s onboard computer. Whether you’re facing a mysterious check engine light or simply want to understand your car’s performance, an OBD-II scanner provides the insights you need to diagnose issues without immediately resorting to expensive professional services.
However, the market is flooded with OBD scanners, and choosing the right one can feel overwhelming. Don’t worry, as seasoned automotive experts, we’ve put numerous OBD-II scanners through rigorous testing to identify the top performers of 2023. Below, we present our definitive guide to the best OBD scanners available, catering to various needs and budgets. We’ll also delve into how OBD-II scanners function and demystify those perplexing error codes.
Among our top selections, the Topdon TopScan stands out as an exceptionally user-friendly wireless option, packed with features for effective diagnostics. For budget-conscious users, the Launch CR529, priced around $40, offers remarkable value. If you’re seeking professional-grade capabilities, the Topdon Phoenix Lite 2 delivers an advanced diagnostic experience, though it comes with a higher price tag of $799.
Here are our curated selections for the best OBD scanners you can purchase right now, ensuring you’re equipped to tackle car diagnostics in 2023.
Tom Pritchard
Tom is the Tech Editor at Tom’s Guide, with extensive experience covering mobile technology and a passion for electric vehicles. His expertise in evaluating hardware and software makes him well-versed in assessing the effectiveness and user-friendliness of OBD scanners.
The Top OBD Scanner 2023 Quick List
Based on our hands-on evaluations, here’s a quick overview of the best OBD scanners you can buy in 2023. Continue scrolling for detailed reviews of each product and insights into why they earned their top rankings.
1. Topdon TopScan: Best Mobile OBD Scanner
Effortless Bluetooth setup and professional-grade features in a compact design. Offering diagnostics, repair guidance, parts lists, and predictive analysis for potential issues.
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2. Launch CR529: Best Budget OBD Scanner
Compact and potent, providing essential OBD-II functions alongside advanced features typically found in higher-priced scanners. Includes lifetime support and updates for exceptional value.
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3. Topdon Phoenix Lite 2: Best Professional-Grade OBD Scanner
Robust and resembling a handheld gaming device, designed for both professionals and enthusiasts. Delivers powerful diagnostics and durability for demanding environments.
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4. Ancel BD310: Best Dual-Purpose OBD Scanner
Versatile OBD-II scanner that doubles as a dashboard display for engine specifications. Combines user-friendly design, smartphone compatibility, and affordability.
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5. Carly OBD-II Scanner: Best OBD Scanner with Companion App
Optimized performance varies by car brand, excelling with VW, BMW, and Ford. Features a top-tier companion app offering extensive customization and professional-level tests.
What Makes These the Best OBD Scanners of 2023?
Why Trust Tom’s Guide? At Tom’s Guide, our commitment is to provide reliable and unbiased reviews. Our team of expert writers and editors dedicates significant time to thoroughly analyze and test products to ensure we recommend only the best options. Learn more about our rigorous testing and review process.
Best Mobile OBD-II Scanner: Topdon TopScan
(Image credit: Topdon)
1. Topdon TopScan
Ideal for Deep Car Diagnostics
Read our expert review:
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
- Comprehensive maintenance item coverage
Reasons to Avoid:
- Bulky transmitter
- Subscription needed for some features after the first year
The Topdon TopScan may appear unassuming at first glance, but this compact scanner is surprisingly powerful. More than just a typical Bluetooth OBD-II module that transmits data to your smartphone app, the TopScan surpasses many competitors in its class in terms of capabilities.
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 OBD-II scanners, especially at this price point.
For car enthusiasts looking to fine-tune their vehicle’s performance or ensure it remains in top condition, the TopScan is an invaluable tool. It offers features comparable to scanners costing ten times more, making it a top pick for the best OBD scanner in 2023 for mobile use.
Read our full Topdon TopScan review
Best Cheap OBD-II Scanner: Launch CR529
(Image credit: Future)
2. Launch CR529
Unbeatable Value Under $50
Read our expert review:
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:
- Extremely affordable
- Lifetime free updates
- Simple pre-inspection report generation
Reasons to Avoid:
- Limited manufacturer-specific codes
- Feels somewhat heavy
- Shorter 1-year warranty
The Launch CR529 redefines value in OBD-II scanners, making it our top choice for the best cheap OBD scanner in 2023. Priced around $38, it delivers a surprising array of diagnostic features that exceed expectations for its cost. We were impressed by the functionality packed into such an affordable device.
While compromises are expected at this price point, such as the absence of manufacturer-specific codes and a slightly heavy feel, the CR529 still provides essential features like live data, instant inspection reports, and comprehensive vehicle system insights. The inclusion of lifetime updates is a significant advantage, ensuring long-term usability without subscription fees.
For users seeking basic to intermediate diagnostic capabilities without breaking the bank, the CR529 is an excellent choice. While it may not satisfy professional mechanics, it’s a fantastic tool for everyday car owners.
Read our full Launch CR529 review
Best Professional-Level OBD-II Scanner: Topdon Phoenix Lite 2
(Image credit: Future)
3. Topdon Phoenix Lite 2
Bridging Amateur and Professional Diagnostics
Read our expert review:
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-grade OBD scanning capabilities
- Hybrid handheld with Wi-Fi and Bluetooth connectivity
- Large 8-inch touchscreen display
- Extensive range of diagnostic tests and live data options
- Includes adapters and a protective hard case
Reasons to Avoid:
- Bulky and heavy design
- High price point
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 commands a higher price than many OBD-II scanners, but it justifies the investment with a comprehensive suite of features, positioning it as the best professional-level OBD scanner of 2023. It’s designed to cater to both serious DIYers and professional mechanics.
A standout feature is its wireless operation, with a Bluetooth receiver connecting to the OBD port and communicating with the control pad. This provides exceptional mobility around the vehicle. While the scanner itself is robust and substantial, it includes a kickstand and rugged construction to withstand workshop conditions.
Beyond standard features, the Phoenix Lite 2 offers advanced functionalities like live data graphing, detailed fault information, and more, typically absent in budget scanners. However, note that firmware updates require a yearly subscription of $495 after the initial two years.
Read our full Topdon Phoenix 2 Lite review
Best Dual-Purpose OBD-II Scanner: Ancel BD310
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
OBD Scanner and Secondary Car Display in One
Read our expert review:
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 secondary car display
- Offers handheld and Bluetooth scanning
Reasons to Avoid:
- Minimalist interface design
- Small screen size
The Ancel BD310 distinguishes itself as a dual-purpose device, serving as both a standard handheld OBD scanner and a supplementary display for vehicle data, earning its place as the best dual-purpose OBD scanner in 2023. It can connect to smartphones via Bluetooth for enhanced functionality.
Its compact and lightweight design makes it easy to store in a glovebox, ensuring it’s always accessible. While the 2-inch screen is small and the four-button interface is somewhat basic, these design choices contribute to its portability without significantly hindering diagnostic use.
The 56-inch cable provides ample reach for under-hood work. The BD310 supports essential functions like I/M readiness tests and displays performance metrics including coolant temperature, engine timing, and speed.
Read our full Ancel BD310 review.
Best Companion App OBD-II Scanner: Carly OBD-II Scanner
(Image credit: Carly)
5. Carly OBD-II Scanner
App-Driven Diagnostics, Car Dependent Features
Read our expert review:
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 app interface
- Extensive customization options
- Live data display and logging
- Maintenance and repair functions
- Lifetime warranty and updates
Reasons to Avoid:
- Feature availability varies by car model
- App subscription can be costly
The Carly OBD Scanner excels with its exceptional companion app, setting it apart as the best OBD scanner with a companion app in 2023. While many Bluetooth scanners offer basic apps, Carly’s app is remarkably well-designed and feature-rich.
The app facilitates fault diagnosis, trouble code clearing, and also provides repair guidance and used car inspection tools. A lifetime warranty adds significant value.
However, the functionality of the Carly scanner is heavily dependent on your car’s make and model, with brands like VW, BMW, and Ford benefiting the most. Beyond basic OBD functions, accessing advanced features requires an ongoing app subscription, which can add to the overall cost.
Read our full Carly OBD scanner review
Other OBD-II Scanners We’ve Tested
Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a standout Bluetooth OBD-II scanner known for its innovative predictive diagnostics and user-friendly setup. It mirrors the features of Innova’s handheld scanners but in a wireless, smartphone-compatible format.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 (★★★★☆)
Despite its larger size for a Bluetooth OBD-II scanner, the ThinkCar ThinkDiag TKD01 is exceptionally durable. It offers extensive manufacturer-specific error codes and advanced fault-code diagnostics capable of resolving minor issues without professional assistance. A subscription of $40 per year is required after the first year.
Read our full ThinkCar ThinkDiag TKD01 review.
Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 is specifically designed for diagnosing electrical problems, featuring a built-in multimeter for detecting issues like burnt cables, shorts, and blown fuses. It also provides a wide range of live data and pre-inspection readiness checks.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions About OBD Scanners
What is an OBD-II Scanner?
OBD-II scanners are diagnostic tools that mechanics and car owners use to communicate with a vehicle’s onboard computer system. Instead of manually disassembling components, mechanics connect these scanners to the car’s OBD port to quickly access and interpret data regarding vehicle health and performance.
At their most basic level, OBD-II scanners read and decipher diagnostic trouble codes (DTCs) that the car’s computer generates when it detects a problem. More sophisticated scanners offer real-time monitoring of vehicle systems and can even predict potential future issues.
What is the OBD-II Port?
The On-Board Diagnostics Version Two (OBD-II) port is a standardized interface found in virtually all passenger vehicles sold in the U.S. since 1996, Canada since 1998, the EU since 2004, and Australia, Mexico, and New Zealand since 2006.
This port serves as the connection point for interfacing with the car’s computer. Beyond OBD-II scanners, it’s also used for devices like insurance telematics boxes and dash cams.
If you’re unsure of your OBD-II port’s location, you can find guides online for locating the OBD-II port in North American vehicles and worldwide OBD-II/EOBD port locations.
What is a DTC (Diagnostic Trouble Code)?
DTC stands for Diagnostic Trouble Code. It’s a standardized error code generated by a vehicle’s OBD system when it detects a malfunction or anomaly. These codes are read by OBD-II scanners, enabling users to diagnose vehicle problems. While many DTCs are universal across vehicle makes and models, some manufacturers use proprietary DTCs specific to their vehicles.
Understanding DTC Meanings
DTCs might seem like random alphanumeric strings at first glance, but they follow a logical structure that can provide insights into the nature of the problem.
The first character indicates the affected vehicle system:
- P – Powertrain (engine and transmission)
- B – Body (interior and exterior body components)
- C – Chassis (braking, steering, and suspension)
- N – Network (communication systems)
The second character is a number indicating code type:
- 0 – Generic (SAE standard) code
- 1 – Manufacturer-specific code
The third character specifies the subsystem:
- 1 – Fuel and air metering
- 2 – Injector circuit (fuel and air metering)
- 3 – Ignition system or misfire
- 4 – Auxiliary emissions control
- 5 – Vehicle speed control and idle control
- 6 – Computer output circuit
- 7, 8, 9 – Transmission and gearbox
- A, B, C – Hybrid propulsion system
The fourth and fifth characters are numeric, ranging from 00 to 99, and further define the specific fault within the identified system and subsystem.
OBD-II scanners typically provide descriptions of DTC meanings. Advanced models offer more detailed information. Online resources like Google can also be helpful in deciphering DTCs, as there are over 5,000 potential codes.
It’s important to note that not all DTCs indicate critical issues. While they can signal serious problems, some may simply alert you to minor anomalies like slightly elevated engine temperature.
Choosing the Best OBD-II Scanner for Your Needs in 2023
If you’re looking to gain insight into your vehicle’s operation and diagnose potential issues, using one of the best OBD-II scanners is the most effective approach.
These tools provide access to the same diagnostic information that dealerships and repair shops use. Why shouldn’t you have the same capability? OBD-II scanners come in two main types:
Handheld OBD-II scanners feature an integrated screen and a cable for direct connection to the OBD port. Wireless OBD-II scanners plug into the OBD port and communicate via Bluetooth with a smartphone or tablet to display diagnostic data.
Regardless of the type, numerous high-quality OBD-II scanners are available for under $200, with some costing less than $30. Key considerations when selecting an OBD-II scanner include:
- Ease of Setup: A scanner should be easy to set up and use immediately to quickly diagnose problems.
- Fault Code Explanation: The best scanners not only display fault codes but also provide clear explanations to help you understand the issue and decide on repair actions.
- I/M Readiness Check: A valuable feature that tests engine and emissions systems to verify if your car will pass state inspections.
- Accuracy: Reliable and accurate results are crucial for effective diagnosis. Inaccurate information is detrimental.
- Size and Weight: A compact and lightweight scanner is more likely to be kept in your car for on-the-go diagnostics.
- Live Data: Real-time data monitoring of engine parameters aids in diagnosing intermittent problems.
- Graphs: Visual data representation through graphs enhances data interpretation, especially for comparative analysis.
- Warranty: A good warranty, ideally lifetime, ensures long-term value and support.
Choosing the best OBD scanner in 2023 involves considering whether you prefer a wireless scanner that uses your phone or tablet or a handheld unit with its own display.
Longevity is also important, so look for scanners with lifetime warranties or software updates to stay compatible with evolving automotive technology.
For handheld scanners, prioritize screen size and clarity for easy readability. Consider ruggedized models with protective bumpers for durability, especially if you work in demanding environments.
Additional features to look for include electrical multimeter functions, manufacturer-specific code reading, and PDF report export capabilities.
The affordability of sophisticated OBD scanners, with many professional-grade options under $100, makes them an incredibly cost-effective tool compared to professional mechanic diagnostic fees.
How We Test OBD-II Scanners
To rigorously test OBD2 scanners and identify the Best Obd Scanner 2023, we used a 2014 Audi A4 Allroad in various settings over several weeks. Each scanner was connected to the vehicle’s OBD-II port, and we verified its ability to correctly identify the car’s Vehicle Identification Number (VIN).
For wireless scanners, we tested connectivity with devices like an Apple iPad Pro, Microsoft Surface, and Samsung Galaxy S9+ via Bluetooth or Wi-Fi. Handheld scanners were tested by simply plugging them into the OBD-II port, which provides power.
We assessed cable lengths on handheld scanners and wireless range for Bluetooth models. With the engine running, we monitored engine and vital systems, and then simulated a fault by disconnecting the engine oil temperature sensor.
We evaluated the detail of the fault information provided by each scanner, then addressed the simulated issue, cleared the check engine light, and erased the error code using the scanner.
Finally, we road-tested each scanner to monitor real-time operating data like engine speed, timing, and coolant temperature, noting whether data was displayed numerically, graphically, or via gauges.
Our testing methodology ensures a comprehensive evaluation of each OBD-II scanner’s capabilities and user-friendliness, allowing us to confidently recommend the best OBD scanners of 2023.
