The Best Obd2 Scanners are essential tools for modern car owners, acting as a vital link to your vehicle’s onboard computer and unlocking a wealth of diagnostic information. Whether you’re facing a mysterious dashboard light or suspect a deeper issue, these scanners empower you to understand your car’s health without immediately resorting to expensive professional services.
Navigating the world of OBD2 scanners can be daunting, especially for beginners. The market is flooded with options, each promising to be the best. Having rigorously tested numerous OBD2 scanners, we’ve compiled a list of top recommendations to simplify your choice. Below, we’ll also delve into how OBD2 scanners function and demystify those often confusing error codes.
Among our top choices, the Topdon TopScan stands out as an exceptionally versatile wireless option, ideal for comprehensive diagnostics. For budget-conscious users, the Launch CR529, priced around $40, delivers impressive functionality. However, for those seeking a professional-grade experience, the Topdon Phoenix Lite 2 offers advanced features, albeit at a premium of $799.
Here are our curated selections for the best OBD2 scanners currently available:
Topdon TopScan mobile OBD2 scanner showcasing its compact design and wireless capability
The Top OBD2 Scanners at a Glance
Based on our hands-on evaluations, here’s a quick overview of the best OBD2 scanners. Continue scrolling for detailed insights into each product and what makes them exceptional.
Launch CR529 OBD-II scanner displayed on a white background, emphasizing its user-friendly interface and compact size
1. Topdon TopScan: Best Mobile OBD-II Scanner
The Topdon TopScan distinguishes itself with effortless Bluetooth setup and a suite of professional-grade features packed into a compact design. It provides comprehensive diagnostics, repair guidance, parts lists, and even predictive analytics to anticipate potential issues.
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Topdon Phoenix Lite 2 OBD-II scanner and tablet on a white backdrop, highlighting its robust build and comprehensive diagnostic capabilities
2. Launch CR529: Best Budget-Friendly OBD-II Scanner
The Launch CR529 is a small yet potent OBD2 scanner, offering essential functionalities and advanced features typically found in higher-priced models. Its lifetime support and updates further enhance its value proposition.
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Ancel BD310 OBD2 scanner demonstrating its dual-purpose functionality and compact design, ideal for both scanning and dashboard augmentation
3. Topdon Phoenix Lite 2: Best Professional-Grade OBD-II Scanner
Resembling a rugged handheld gaming device, the Topdon Phoenix Lite 2 is designed for both professionals and serious DIY enthusiasts. It’s a robust and powerful scanner built to withstand demanding environments.
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Carly OBD scanner grid image showcasing its sleek design and highlighting its app-based functionality for enhanced diagnostics
4. Ancel BD310: Best Dual-Purpose OBD-II Scanner
The Ancel BD310 serves as both an effective OBD2 scanner and a supplementary dashboard display, providing real-time engine specifications. It combines user-friendly design, smartphone compatibility, and affordability.
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5. Carly OBD-II Scanner: Best OBD-II Scanner with Companion App
The Carly OBD-II Scanner’s utility is highly dependent on your car make, with brands like VW, BMW, and Ford benefiting most from its extensive features and exceptional companion app, offering customization and professional-level testing.
Deep Dive into the Best OBD2 Scanners
Best Mobile OBD-II Scanner
Topdon TopScan OBD scanner with Bluetooth connectivity, emphasizing its wireless operation and ease of use
1. Topdon TopScan
Perfect for comprehensive car diagnostics
Specifications:
- Display/size: None
- Bluetooth/handheld: Yes/No
- I/M Readiness test: Yes
- Displays live data: Yes
- Number of keys: None
- Warranty: 2 year
- Size: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Excellent diagnostic coverage
- Live data streaming
- Unique performance indicators
- Broad maintenance coverage
Reasons to Avoid:
- Larger transmitter
- Subscription required for some features after the first year
The Topdon TopScan might appear unassuming, but this compact scanner is packed with features far exceeding typical Bluetooth OBD2 modules. It goes beyond basic fault finding and I/M Readiness tests, offering performance and efficiency checks, including estimations of horsepower and torque. Its capabilities rival scanners costing ten times more, making it an invaluable tool for both car enthusiasts and everyday owners focused on vehicle maintenance and roadworthiness.
Read our full Topdon TopScan review
Best Budget OBD-II Scanner
Launch CR529 OBD-II scanner in a handheld format, highlighting its portability and ease of use for quick car diagnostics
2. Launch CR529
Exceptional OBD-II scanner under $50
Specifications:
- Display/size: Color/ 2.8-inches
- Bluetooth/handheld: No/Yes
- I/M Readiness test: Yes
- Displays live data: 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
- Easy pre-inspection reporting
Reasons to Avoid:
- Lacks manufacturer-specific codes
- Feels somewhat heavy
- 1-year warranty
The Launch CR529 is arguably the best value OBD2 scanner on the market, offering a surprising array of diagnostic features for its budget-friendly price. While compromises include the absence of manufacturer-specific codes and a slightly heavier build, it compensates with live data, instant inspection reports, and lifetime updates, eliminating subscription fees. While perhaps not ideal for professional mechanics, the CR529 is an excellent choice for most car owners looking for reliable diagnostics without breaking the bank.
Read our full Launch CR529 review
Best Professional-Level OBD-II Scanner
Topdon Phoenix Lite 2 OBD2 scanner positioned over a car engine, emphasizing its advanced features and suitability for professional use
3. Topdon Phoenix Lite 2
Bridging the gap between amateur and professional diagnostics
Specifications:
- Display/size: Color/8-inch
- Bluetooth/handheld: Yes/Yes
- I/M Readiness test: Yes
- Displays live data: 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:
- Near-professional OBD scanner capabilities
- Hybrid handheld with Wi-Fi and Bluetooth
- Large 8-inch touchscreen
- Extensive diagnostic tests and live data
- Includes adapters and hard case
Reasons to Avoid:
- Bulky and heavy
- Expensive
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 justifies its higher price with a comprehensive feature set, appealing to both experienced mechanics and serious car enthusiasts. Its wireless operation, facilitated by a Bluetooth receiver, offers freedom of movement around the vehicle. The rugged design and kickstand enhance usability in workshop environments. Beyond standard features, it provides live data graphing and advanced diagnostic capabilities typically absent in cheaper scanners. Note that firmware updates require a yearly subscription after the initial two years.
Read our full Topdon Phoenix 2 Lite review
Best Dual-Purpose OBD-II Scanner
Ancel BD310 OBD-II scanner in use, showcasing its compact form factor and integration with a car's dashboard for real-time data display
4. Ancel BD310
A versatile OBD-II scanner with dual functionality
Specifications:
- Display/size: Color/2 inches
- Bluetooth/handheld: Yes/Yes
- I/M Readiness test: Yes
- Displays live data: 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
- Functions as a scanner and secondary display
- Handheld and Bluetooth scanning options
Reasons to Avoid:
- Minimalist interface
- Small screen
The Ancel BD310 excels in versatility, functioning as a standard handheld scanner and a Bluetooth-connected device capable of displaying engine data on your smartphone. Its compact size makes it conveniently glovebox-friendly. While the 2-inch screen and minimalist interface might be considered drawbacks, its core diagnostic functions, including I/M readiness tests and performance data readings, remain effective. The long cable and dual functionality as a secondary display enhance its practicality.
Read our full Ancel BD310 review
Best OBD-II Scanner with Companion App
Carly OBD 2 scanner design, emphasizing its sleek and modern appearance, and its app-centric operation for advanced vehicle diagnostics
5. Carly OBD-II Scanner
A capable scanner that’s car-dependent in features
Specifications:
- Display/Size: No
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: No
- Displays live data: 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 assistance
- Lifetime warranty and updates
Reasons to Avoid:
- Feature availability varies by car model
- App subscription can be costly for full features
The Carly OBD Scanner is distinguished by its exceptional companion app, offering a superior user experience compared to many Bluetooth scanners with basic apps. Beyond diagnostics and fault clearing, the app provides repair assistance and used car inspection tools. However, feature availability is car-model dependent, and accessing advanced functionalities beyond basic OBD requires a subscription, which could become expensive over time. Despite these limitations, the app’s quality and the lifetime warranty make Carly a compelling option for supported vehicles.
Read our full Carly OBD scanner review
Other OBD-II Scanners We’ve Tested
Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 stands out as a highly innovative Bluetooth OBD2 scanner, inheriting Innova’s impressive predictive diagnostics. Its wireless operation and streamlined setup process make it a notable Bluetooth-only choice.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 (★★★★☆)
The ThinkCar ThinkDiag TKD01, while larger for a Bluetooth OBD2 scanner, boasts exceptional durability. It offers extensive manufacturer-specific error codes and advanced fault-code resolution capabilities, potentially resolving minor issues without mechanic intervention. A 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, incorporating a built-in multimeter for identifying electrical faults like shorts, blown fuses, and damaged cables. It also provides comprehensive live data and pre-inspection readiness checks.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions about OBD2 Scanners
What exactly is an OBD-II Scanner?
OBD2 scanners are diagnostic tools that mechanics and car owners use to access information from a vehicle’s onboard computer via the OBD port. These scanners read error codes, monitor real-time system data, and, in advanced models, predict potential future issues. They eliminate guesswork in car repair, providing concrete data about a vehicle’s condition.
What is the OBD-II port and where is it located?
The On-Board Diagnostics Version Two (OBD-II) port is a standardized interface found in nearly all passenger vehicles sold in the US since 1996, and in other major markets shortly after. It serves as the connection point for diagnostic tools like OBD2 scanners, as well as other devices like insurance trackers and dash cams.
Find your car’s OBD-II port location for North American vehicles, or find worldwide OBD-II/EOBD port locations.
What is a DTC in the context of OBD-II scanners?
DTC stands for Diagnostic Trouble Code. These are error codes generated by a car’s OBD system when it detects a problem. OBD2 scanners read and interpret these DTCs, allowing users to diagnose vehicle issues. While many DTCs are standardized across manufacturers, some are manufacturer-specific.
Decoding DTCs: What do they actually mean?
DTCs appear as alphanumeric codes that can seem cryptic initially. However, they follow a logical structure. The first character indicates the affected system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character denotes whether the code is generic (0) or manufacturer-specific (1). 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
- 5: Speed control and idle control
- 6: Computer auxiliary outputs
- 7, 8, 9: Transmission/gearbox
- A, B, C: Hybrid propulsion
The fourth and fifth characters pinpoint the exact fault within the subsystem, ranging from 0 to 99. OBD2 scanners decode these codes, and advanced models offer detailed explanations. Online resources like Google can also assist in DTC interpretation. It’s important to note that not all DTCs signal critical issues; some may indicate minor problems like slightly elevated engine temperature.
Choosing the Best OBD2 Scanner: Key Considerations
When selecting an OBD2 scanner, consider your needs and priorities. These tools provide invaluable insights into your vehicle’s operation and potential problems, mirroring the diagnostic capabilities of professional mechanics. OBD2 scanners come in two main types:
Handheld OBD-II scanners: These units have integrated screens and connect directly to the OBD port via a cable.
Wireless OBD2 scanners: These plug into the OBD port and transmit data wirelessly via Bluetooth to a smartphone or tablet.
High-quality OBD2 scanners are available across various price points, some under $200 and even under $30. Key factors to consider when choosing the best OBD2 scanner include:
- Ease of Setup: A straightforward setup is crucial for prompt diagnostics.
- Fault Code Explanation: Scanners should not only display fault codes but also provide clear explanations for effective troubleshooting.
- I/M Readiness Check: Essential for emissions testing, this feature verifies system readiness for state inspections.
- Accuracy: Reliable and accurate readings are paramount for correct diagnoses.
- Size and Weight: Portability and ease of handling are important for frequent use.
- Live Data Display: Real-time monitoring of engine parameters aids in identifying intermittent issues.
- Data Graphing: Visual data representation through graphs enhances analysis.
- Warranty: A robust warranty reflects product quality and longevity, with some offering lifetime warranties.
Deciding between handheld and wireless scanners depends on personal preference. Consider longevity with lifetime warranties or software updates to ensure your scanner remains current. For handheld scanners, prioritize screen size and clarity. Rugged designs with shock absorption are beneficial for durability. Extra features like multimeters, manufacturer-specific code reading, and PDF export capabilities can also be advantageous. Ultimately, OBD2 scanners offer significant value, often costing less than an hour of professional mechanic labor.
Our OBD2 Scanner Testing Methodology
To rigorously evaluate OBD2 scanners, we utilized a 2014 Audi A4 Allroad over several weeks, testing in both garage and on-road conditions. Each scanner was connected to the vehicle’s OBD-II port, verifying VIN reporting. Wireless scanners were paired with Apple iPads, Microsoft Surfaces, and Samsung Galaxy smartphones via Bluetooth or Wi-Fi. Handheld scanners were powered directly through the OBD port.
Cord lengths (for handhelds) and wireless ranges were measured. With the engine running, engine and system parameters were monitored. To test diagnostic accuracy, the engine oil temperature sensor was intentionally disconnected. Scanner details, fault code reporting, and ease of fault clearing were assessed. On-road testing evaluated live data display, including engine speed, timing, and coolant temperature, noting data presentation formats (numerical, graphs, gauges).
Fault code interpretation was verified, understanding the alphanumeric structure: Powertrain (P), Body (B), Chassis (C), Undefined (U), and generic (0) vs. manufacturer-specific (1) codes. For example, a P0098 code (generic intake air temperature sensor issue) was compared to a Ford-specific P1112 code (intake air temperature sensor intermittent values).
