For any car owner, the ability to understand your vehicle’s health is invaluable. That’s where the best OBD2 scanners come into play, acting as a crucial tool for deciphering your car’s inner workings. A mysterious dashboard light can trigger anxiety in even the most laid-back individuals. Instead of immediately rushing to a mechanic and incurring potentially unnecessary costs, an OBD2 scanner empowers you to take the first step in diagnosing the issue yourself. Determine if it’s a minor problem you can handle at home or a serious issue requiring professional attention.
The market offers a vast array of OBD2 scanners, which can be overwhelming. They vary significantly in features and capabilities. At obd-de.com, our team of auto repair experts has rigorously tested numerous OBD2 scanners to help you navigate this landscape and choose the best tool for your needs.
Our top recommendation is the Innova 6100P. This scanner stands out with its dual functionality, offering both a handheld device and a companion app for diagnostics. It goes beyond basic error code reading by providing predictive analysis, anticipating potential problems and even offering repair guidance and parts information. This level of detail truly elevates the user experience, making even novice users feel more confident in their diagnostic abilities.
For those seeking a more compact and wireless solution, the Topdon TopScan Bluetooth scanner is an excellent choice. Its discreet design belies its powerful capabilities in live data monitoring and in-depth diagnostics. If budget is a primary concern, the Launch CR529 is a remarkable option. Priced under $40, it delivers features that rival scanners costing significantly more, offering exceptional value.
Here’s a detailed look at our top selections for the best OBD2 scanners currently available, ensuring you can find the perfect tool to understand your vehicle’s sensor data and overall health.
Tom Pritchard
Tom is the Tom’s Guide UK Phones Editor, covering a wide range of mobile technology and is also a passionate electric car advocate.
Top OBD2 Scanner Picks: Quick List
Below are our top recommendations for the best OBD2 scanners, based on extensive hands-on testing. Continue scrolling for detailed reviews of each scanner and insights into their standout features.
Innova 6100P: Best Overall OBD2 Scanner
1. Innova 6100P
This handheld scanner and companion app combination provides professional-level diagnostics, offering detailed problem descriptions, parts lists, repair costs, and predictive maintenance alerts.
Read more about Innova 6100P
Topdon TopScan: Best Mobile OBD2 Scanner
2. Topdon TopScan
This compact Bluetooth scanner offers professional-grade features in a user-friendly design, including comprehensive diagnostics, repair instructions, parts lists, and proactive problem prediction.
Explore Topdon TopScan Features
Launch CR529: Best Budget OBD2 Scanner
3. Launch CR529
The Launch CR529 is a feature-rich, budget-friendly scanner that outperforms many higher-priced competitors, offering lifetime support and software updates for exceptional value.
Discover Launch CR529 Value
Topdon Phoenix Lite 2: Best Rugged OBD2 Scanner
4. Topdon Phoenix Lite 2
Built for both professionals and DIYers, the Topdon Phoenix Lite 2 is a rugged, powerful scanner with a user-friendly touchscreen interface, designed to withstand demanding workshop environments.
Learn About Topdon Phoenix Lite 2 Durability
Ancel BD310: Best Dual-Purpose OBD2 Scanner
5. Ancel BD310
The Ancel BD310 is a versatile OBD2 scanner that doubles as an auxiliary dashboard display, offering both handheld and smartphone-connected operation at a reasonable price.
Explore Ancel BD310 Versatility
Carly OBD-II Scanner: Best OBD2 Scanner with Companion App
6. Carly OBD-II Scanner
The Carly OBD-II Scanner excels with its feature-rich companion app, offering extensive customization and professional-level diagnostic tests, particularly beneficial for VW, BMW, and Ford owners.
Discover Carly OBD-II Scanner App Features
Deep Dive: Choosing the Best OBD2 Scanner
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1. Best Overall OBD2 Scanner: Innova 6100P
Innova 6100P Menu Screen
Expert Pick Badge
Innova 6100P: Designed to Empower DIY Mechanics
Expert Review:
The Innova 6100P excels at making users feel like seasoned professionals, regardless of their actual automotive expertise. This scanner simplifies complex diagnostic tasks and delivers results quickly and efficiently. While the initial setup is slightly more involved than some competitors, plugging the scanner into the OBD port immediately initiates operation.
The hybrid design is a key advantage, allowing users to choose between the handheld scanner and the feature-rich Innova companion app. The app’s predictive maintenance feature is particularly impressive, forecasting potential component failures and enabling proactive repairs. This future-oriented capability, combined with live data streaming, fault code reading, pre-inspection I/M readiness checks, and a generous 72-inch cable, justifies its $120 price point, making it a worthwhile investment for comprehensive car diagnostics and sensor monitoring.
Key Specifications:
- Display: 2.8-inch Color
- Connectivity: Handheld & App-Based
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: 9
- Warranty: 1 Year
- Dimensions: 7.2 x 3.4 x 1.1 inches
- Weight: 6.5 ounces
Pros:
- Compact and portable
- Resets battery and oil lights
- Offers both handheld and app-based diagnostics
- Provides repair instructions and parts information
Cons:
- Text-based interface
- Buttons require firm pressure
Read our comprehensive Innova 6100P review.
2. Best Mobile OBD2 Scanner: Topdon TopScan
Topdon TopScan Bluetooth OBD2 Scanner
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Topdon TopScan: Unleashing Your Car’s Diagnostic Potential Wirelessly
Expert Review:
Despite its unassuming appearance, the Topdon TopScan is a powerhouse of automotive diagnostics. This Bluetooth OBD2 module goes beyond basic functionality, exceeding the capabilities of many competitors in its class. It not only reads fault codes and performs I/M readiness tests but also assesses vehicle performance and efficiency, even estimating horsepower and torque.
This level of diagnostic depth is rare, even in scanners costing ten times as much. Whether you are looking to optimize your car’s performance or ensure its roadworthiness, the Topdon TopScan is an invaluable tool for accessing detailed sensor data and vehicle health insights.
Key Specifications:
- Display: None (App-Based)
- Connectivity: Bluetooth
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: None (App-Based)
- Warranty: 2 Years
- Dimensions: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Pros:
- Exceptional diagnostic coverage
- Real-time live data monitoring
- Unique performance indicators
- Maintenance item coverage
Cons:
- Bulky transmitter
- Subscription required for some features after the first year
Explore our full Topdon TopScan review.
3. Best Budget OBD2 Scanner: Launch CR529
Launch CR529 OBD2 Scanner
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Launch CR529: Unbeatable Value in OBD2 Diagnostics
Expert Review:
The Launch CR529 redefines value in OBD2 scanners, offering an impressive array of diagnostic features at an incredibly affordable price point of under $50. The level of functionality packed into this scanner is unexpected for its cost, making it an exceptional choice for budget-conscious users.
While some compromises are present, such as the lack of manufacturer-specific codes and a somewhat heavy feel, the CR529 still delivers essential features like live data, instant inspection reports, and in-depth access to your car’s systems. Lifetime updates further enhance its value, ensuring long-term usability without subscription fees. Although it may not satisfy professional mechanics, the Launch CR529 is an excellent and cost-effective OBD2 scanner for the average car owner looking to monitor sensor data and diagnose basic issues.
Key Specifications:
- Display: 2.8-inch Color
- Connectivity: Handheld
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: 8
- Warranty: 1 Year
- Dimensions: 6.5 x 3.8 x 1.2 inches
- Weight: 11 ounces
Pros:
- Very affordable
- Lifetime updates included
- Easy pre-inspection reporting
Cons:
- Lacks manufacturer-specific codes
- Feels somewhat heavy
- 1-year warranty
Read our in-depth Launch CR529 review.
4. Best Pro-Level OBD2 Scanner: Topdon Phoenix Lite 2
Topdon Phoenix Lite 2 Professional OBD2 Scanner
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Topdon Phoenix Lite 2: Bridging the Gap Between DIY and Professional Diagnostics
Expert Review:
The Topdon Phoenix Lite 2 is a premium OBD2 scanner that commands a higher price but delivers exceptional value with its near-professional capabilities. It caters to both amateur and professional users, offering a comprehensive diagnostic experience.
Its wireless design, with a Bluetooth-connected control pad, provides unparalleled freedom of movement around the vehicle. The robust and rugged build, complete with a kickstand, ensures durability in any workshop setting. Advanced features such as live data graphing and extensive fault information are included, typically found in more expensive professional tools. While the two-year firmware update limit and subsequent subscription cost are factors to consider, the Topdon Phoenix Lite 2 offers a powerful and versatile solution for advanced car diagnostics and sensor analysis.
Key Specifications:
- Display: 8-inch Color Touchscreen
- Connectivity: Bluetooth & Wi-Fi
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: Touchscreen
- Warranty: 2 Years
- Dimensions: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Pros:
- Professional-grade 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
Cons:
- Bulky and heavy
- Expensive
- Subscription required after two years for updates
Explore our detailed Topdon Phoenix 2 Lite review.
5. Best Dual-Purpose OBD2 Scanner: Ancel BD310
Ancel BD310 OBD2 Scanner
Ancel BD310: OBD2 Scanner and Secondary Dashboard Display in One
Expert Review:
The Ancel BD310 offers a unique dual functionality, serving as both a standard handheld OBD2 scanner and a Bluetooth-connected secondary display for your car’s dashboard. This versatility makes it a practical tool for everyday use and diagnostics.
Its compact and lightweight design allows for easy storage in the glovebox, ensuring it’s always accessible. While the 2-inch display is small and the four-button interface is somewhat basic, these design choices contribute to its portability without hindering diagnostic capabilities. The 56-inch cable provides ample reach, and the BD310 effectively performs essential functions like I/M readiness tests and displays performance data, including coolant temperature, engine timing, and speed, making it a handy tool for monitoring car sensor readings and basic diagnostics.
Key Specifications:
- Display: 2-inch Color
- Connectivity: Handheld & Bluetooth
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: 4
- Warranty: 3 Years
- Dimensions: 5.1 x 2.4 x 0.6 inches
- Weight: 5.4 ounces
Pros:
- Lightweight and compact
- Functions as a scanner and secondary display
- Handheld and Bluetooth scanning
Cons:
- Minimalist interface
- Small screen
Read our complete Ancel BD310 review.
6. Best OBD2 Scanner with Companion App: Carly OBD-II Scanner
Carly OBD-II Scanner
Carly OBD-II Scanner: App-Driven Diagnostics with Extensive Customization
Expert Review:
The Carly OBD Scanner distinguishes itself with an exceptional companion app, setting a high standard for app-based OBD2 diagnostics. Unlike many basic Bluetooth scanner apps, Carly’s app is feature-rich and user-friendly, offering extensive customization and advanced functionalities.
Beyond basic fault code reading and clearing, the app provides repair assistance, used car checks, and a lifetime warranty, adding significant value. However, feature availability varies by car model, with VW, BMW, and Ford vehicles benefiting most comprehensively. While the app’s subscription model can become costly for advanced features, the Carly OBD-II Scanner and its companion app offer a premium, customizable diagnostic experience, particularly for users with compatible vehicle brands, providing deep insights into car sensor data and system health.
Key Specifications:
- Display: None (App-Based)
- Connectivity: Bluetooth
- I/M Readiness Test: No
- Live Data Display: Yes
- Keys: None (App-Based)
- Warranty: Lifetime
- Dimensions: 2.9 x 1.5 x 0.7 inches
- Weight: 0.7 ounces
Pros:
- User-friendly interface
- Customization options
- Live data display
- Maintenance and repair features
- Lifetime warranty and updates
Cons:
- Feature availability varies by car model
- App subscription can be expensive
Explore our full Carly OBD scanner review.
Other OBD2 Scanners We Evaluated
Innova CarScan Mobile 1000 in Use
8. Innova CarScan Mobile 1000
Innovative Diagnostics in a Compact Form
Expert Review:
The Innova CarScan Mobile 1000 is a standout Bluetooth OBD2 scanner due to its innovative features and ease of use. It sets up effortlessly and packs many advanced diagnostic capabilities found in larger Innova scanners into a compact wireless module.
The CarScan Mobile 1000 offers a wide array of diagnostic functions, including predictive analysis for proactive problem identification and repair suggestions, mirroring the capabilities of higher-end Innova models. It can also transform your smartphone into a set of automotive gauges, adding to its versatility. However, it relies on two separate apps, both of which contain ads, which may detract from the user experience.
Key Specifications:
- Display: None (App-Based)
- Connectivity: Bluetooth
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: None (App-Based)
- Warranty: 1 Year
- Dimensions: 2.0 x 1.5 x 1.0 inches
- Weight: 0.9 ounces
Pros:
- Easy setup process
- Small and highly portable
- Excellent companion app features
- Predictive diagnostics and repair suggestions
- Functions as standalone gauges
Cons:
- Uses two separate apps
- Apps contain advertisements
Read the full Innova CarScan Mobile 1000 review.
ThinkCar ThinkDiag TKD01 Bottom View
9. ThinkCar ThinkDiag TKD01
Reliable Diagnostics with a Subscription Model
Expert Review:
The ThinkCar ThinkDiag TKD01 is a larger Bluetooth OBD2 scanner, which may pose installation challenges in some vehicles, potentially requiring an extension cable. However, its robust, oval-shaped module is exceptionally durable.
The ThinkDiag app supports profiles for over 100 car manufacturers, making it highly effective for accessing manufacturer-specific error codes. It also displays extended fault codes and efficiently manages common issues like oil change lights. Similar to Innova, it offers predictive problem alerts but lacks repair guidance. A significant drawback is the annual subscription fee of at least $40 required after the first year to maintain access to its features.
Key Specifications:
- Display: None (App-Based)
- Connectivity: Bluetooth
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: None (App-Based)
- Warranty: 1 Year
- Dimensions: 3.1 x 2.0 x 1.1 inches
- Weight: 2.7 ounces
Pros:
- Reads enhanced diagnostic codes
- Wide range of optional functions
- Includes a hard carry case
Cons:
- Subscription fee of $40/year after the first year
- Heavy unit
- Setup can be difficult
Read our thorough ThinkCar ThinkDiag TKD01 review.
Autel AutoLink AL539 OBD2 Scanner
10. Autel AutoLink AL539
OBD2 Scanner with Electrical System Diagnostic Capabilities
Expert Review:
The Autel AutoLink AL539 stands out with its integrated multimeter, a unique feature among OBD2 scanners that allows for diagnosing electrical system issues. It can identify problems such as wiring faults, shorts, alternator voltage issues, and fuse failures. However, the multimeter cannot be used simultaneously with OBD2 scanning.
As an OBD2 scanner, the AL539 provides live data and performs comprehensive pre-inspection readiness tests. Faults are clearly indicated with color-coded lights for easy interpretation. Its design is compact and lightweight, enhanced by a pull-out stand and a 58-inch cable. The interface is intuitive, with icon-based function access, making the Autel AutoLink AL539 a versatile tool for both OBD2 and electrical diagnostics.
Key Specifications:
- Display: 2.8-inch Color
- Connectivity: Handheld
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: 8
- Warranty: 1 Year
- Dimensions: 6.7 x 3.6 x 1.4 inches
- Weight: 10.6 ounces
Pros:
- Integrated electrical multimeter
- Battery testing capabilities
- Includes a stand
Cons:
- OBD and electrical scanning cannot be used at the same time
- Battery charging required
Explore our detailed Autel AutoLink AL539 review.
Frequently Asked Questions About OBD2 Scanners
What Exactly is an OBD2 Scanner?
OBD2 scanners are diagnostic tools that mechanics and car owners use to understand a vehicle’s health. Instead of manual inspection, these scanners plug into your car’s OBD port to access data from the onboard computer.
Basic OBD2 scanners read and interpret error codes generated by your car when it detects an issue. Advanced models can monitor car systems in real-time and even predict potential future problems. These tools are essential for understanding car sensor readings and overall system health.
Understanding the OBD2 Port
The On-Board Diagnostics Version Two (OBD2) port is a standardized port found in almost all passenger vehicles sold in the United States since 1996, Canada since 1998, European Union since 2004, and other regions like Australia and New Zealand since 2006.
This port serves as the interface to your car’s onboard computer. Various devices can connect to it, including OBD2 scanners, insurance tracking devices, and dash cams.
If you are unsure of your OBD2 port location, resources are available to help you find your car’s OBD2 port in North American vehicles or locate OBD2/EOBD ports worldwide.
Decoding DTCs: Diagnostic Trouble Codes
DTC stands for Diagnostic Trouble Code. These error codes are generated by a car’s OBD system when it identifies a problem. OBD2 scanners read these codes to help users diagnose vehicle issues. While many DTCs are standardized across vehicle makes and models, some manufacturers use proprietary DTCs specific to their vehicles.
Interpreting DTC Meanings
DTCs may appear cryptic, consisting of letters and numbers. However, they follow a logical structure that indicates the type and location of the problem.
- The first letter denotes the affected system: Powertrain (P), Body (B), Chassis (C), or Network (N).
- The second character is a number: 0 for generic codes and 1 for manufacturer-specific codes.
- 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 controls
- 5: Vehicle speed and idle control systems
- 6: Computer output systems
- 7, 8, 9: Transmission and gearbox faults
- A, B, C: Hybrid propulsion system faults
- The fourth and fifth characters indicate the specific fault, ranging from 0 to 99.
OBD2 scanners provide descriptions of these error codes, and advanced models offer more detailed information. Online resources like Google can also help decipher DTCs. It’s important to note that not all DTCs indicate critical issues; some may simply warn of minor anomalies like slightly elevated engine temperature. Understanding DTCs and using OBD2 scanners allows for better interpretation of car sensor data and diagnostic information.
Choosing the Right OBD2 Scanner for Your Needs
For anyone seeking to understand their vehicle’s performance or diagnose issues, an OBD2 scanner is an essential tool. These devices provide insights into your car’s systems, similar to what dealerships and repair shops use. Having this information empowers you to make informed decisions about vehicle maintenance.
OBD2 scanners come in two primary types:
- Handheld OBD2 Scanners: These units have their own display screen and connect directly to the OBD port via a cable.
- Wireless OBD2 Scanners: These scanners plug into the OBD port and connect wirelessly via Bluetooth to a smartphone or tablet for displaying diagnostic data.
Both types offer high-performance options under $200, and some are even available for under $30. Key factors to consider when choosing the best OBD2 scanner include:
- Ease of Setup: A scanner should be easy to set up and use quickly for timely diagnostics.
- Fault Code Explanation: The best scanners not only display fault codes but also provide clear explanations, aiding in DIY repairs or informed communication with mechanics.
- I/M Readiness Check: A valuable feature for pre-inspection checks to ensure your vehicle will pass emissions tests.
- Accuracy: Reliable and accurate diagnostic results are crucial for effective troubleshooting.
- Size and Weight: Portability is important for convenience and on-the-go diagnostics.
- Live Data: Access to real-time engine data helps in diagnosing intermittent issues.
- Data Graphs: Visual data representation through graphs enhances understanding and comparison of system performance.
- Warranty: A good warranty provides peace of mind and long-term value. Lifetime warranties are particularly advantageous.
When selecting an OBD2 scanner, consider whether you prefer a handheld unit with an integrated screen or a wireless model that uses your smartphone. Longevity is also important, so look for scanners with lifetime warranties or software updates to keep pace with automotive technology advancements.
For handheld scanners, prioritize screen size and clarity, aiming for a large, bright, icon-based display for ease of use. Ruggedness and durability are beneficial, especially for users who may be working in demanding environments.
Additional features to consider include electrical multimeter functionality, manufacturer-specific code reading, and PDF report exporting. With sophisticated OBD2 scanners available for under $
