Unlocking the complexities of your car’s internal systems is no longer exclusive to professional mechanics. With the advancement of technology, a Good Obd2 Scan Tool has become an indispensable gadget for car owners wanting to understand and maintain their vehicles better. These tools connect to your car’s onboard computer, providing access to a wealth of data, from diagnosing a simple check engine light to more intricate system analyses. Choosing the right OBD2 scanner can feel overwhelming, but fear not. We’ve rigorously tested a range of OBD2 scanners to help you pinpoint the best options available today, ensuring you can confidently tackle car diagnostics at home.
Whether you’re a seasoned DIY enthusiast or a car owner just starting to delve into vehicle maintenance, understanding what constitutes a good OBD2 scan tool is crucial. From basic code reading to advanced features like live data streaming and predictive diagnostics, the capabilities vary significantly across models. Our guide will navigate you through the top OBD2 scanners, highlighting their strengths and weaknesses, and ultimately help you select a tool that fits your needs and budget.
Among our top recommendations, the Topdon TopScan stands out as a remarkably user-friendly wireless option, packed with features that belie its compact size. For those mindful of budget, the Launch CR529, priced around $40, offers exceptional value without compromising essential functionalities. And for users demanding professional-grade diagnostics, the Topdon Phoenix Lite 2 delivers an experience akin to what professionals use, albeit at a higher price point of $799.
Below, we present our curated list of the best OBD2 scan tools currently on the market, each rigorously tested and evaluated. Continue reading for detailed insights into each scanner, helping you determine which tool is the ideal companion for your car care journey.
Tom Pritchard
Tom is an experienced tech editor with a focus on mobile technology and automotive tech. His expertise in reviewing gadgets and his passion for electric vehicles make him uniquely qualified to evaluate OBD2 scanners and their practical applications for car owners.
Top Picks: The Best Good OBD2 Scan Tools at a Glance
For those in a hurry, here’s a quick rundown of our top recommendations for good OBD2 scan tools. For more detailed reviews, simply scroll down to the section that interests you most.
Topdon TopScan: Best Mobile Scanner
1. Topdon TopScan
This Bluetooth OBD2 scanner is incredibly easy to set up and use, offering a suite of professional-grade diagnostic features in a compact design. It provides not only diagnostics but also repair guidance, parts information, and even predictive analysis to anticipate potential issues.
Dive Deeper into Topdon TopScan
Launch CR529: Best Cheap Scanner
2. Launch CR529
The Launch CR529 is a small yet powerful OBD2 scanner that delivers essential functionalities and some advanced features typically found in higher-priced models. It includes lifetime support and updates, offering remarkable value for its affordable price.
Explore the Value of Launch CR529
Topdon Phoenix Lite 2: Best Professional-Level Scanner
3. Topdon Phoenix Lite 2
With its robust design and tablet-like interface, the Topdon Phoenix Lite 2 is designed for both professionals and serious car enthusiasts. It’s a powerful scanner capable of handling rigorous use and complex diagnostics.
Discover the Professional Power of Topdon Phoenix Lite 2
Ancel BD310: Best Dual-Purpose Scanner
4. Ancel BD310
The Ancel BD310 serves as both an effective OBD2 scanner and a supplementary dashboard display, offering engine specifications in real-time. Its user-friendly design, smartphone compatibility, and reasonable price make it a versatile choice.
Learn More About Ancel BD310’s Dual Functionality
Carly OBD-II Scanner: Best Scanner with Companion App
5. Carly OBD-II Scanner
The Carly OBD-II Scanner is distinguished by its exceptional companion app, offering extensive customization and professional-level diagnostic tests. Its value is particularly pronounced for owners of VW, BMW, and Ford vehicles.
Explore the App-Driven Experience of Carly OBD-II Scanner
Deep Dive: Exploring the Best Good OBD2 Scan Tools
Why Trust Tom’s Guide? Our commitment to providing reliable recommendations means our experts dedicate significant time to hands-on testing and rigorous analysis of products and services. Learn more about our testing methodology.
1. Topdon TopScan: The Best Mobile OBD2 Scanner
(Image credit: Topdon)
Perfect For: In-depth car diagnostics from your smartphone.
Expert Review: Topdon TopScan Review
Key Specifications:
- Display: None (relies on smartphone)
- Connectivity: Bluetooth
- Handheld: No
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: None (app-driven)
- Warranty: 2 years
- Dimensions: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Exceptional automotive diagnostic coverage
- Comprehensive live data monitoring
- Unique performance indicators
- Extensive maintenance functions
Reasons to Avoid:
- Larger transmitter size
- Subscription required for some features after the first year
The Topdon TopScan redefines what a good OBD2 scan tool can be, especially in a compact, Bluetooth-enabled form. Despite its unassuming appearance, this scanner is packed with features typically found in more expensive, professional-grade devices. It goes beyond basic fault code reading and I/M Readiness tests, offering advanced capabilities like performance and efficiency checks, and even estimates your car’s horsepower and torque. For car enthusiasts looking to fine-tune their vehicle or ensure peak roadworthiness, the TopScan is an invaluable tool.
Read our full Topdon TopScan review
2. Launch CR529: The Best Cheap Good OBD2 Scanner
(Image credit: Future)
Perfect For: Affordable, reliable diagnostics for everyday car owners.
Expert Review: Launch CR529 Review
Key Specifications:
- Display: Color, 2.8-inch
- Connectivity: None (handheld)
- Handheld: Yes
- 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
Reasons to Buy:
- Highly affordable
- Lifetime free updates
- Easy pre-inspection reporting
Reasons to Avoid:
- Limited manufacturer-specific codes
- Feels somewhat heavy
- Shorter 1-year warranty
The Launch CR529 redefines what a good OBD2 scan tool can offer at a budget price point. Priced under $50, it delivers a surprising array of diagnostic features, making it an exceptional value. While it does have limitations, such as lacking manufacturer-specific codes and a slightly heavy feel, it compensates with essential functionalities like live data, instant inspection reports, and lifetime updates, all without any subscription fees. For car owners seeking a reliable, cost-effective OBD2 scanner, the CR529 is hard to beat.
Read our full Launch CR529 review
3. Topdon Phoenix Lite 2: The Best Pro-Level Good OBD2 Scanner
[
(Image credit: Future)](https://target.georiot.com/Proxy.ashx?tsid=45724&GR_URL=https%3A%2F%2Famazon.com%2Fdp%2FB085TG89H4%3Ftag%3Dhawk-future-20%26ascsubtag%3Dtomsguide-us-6624740130487362149-20)
Perfect For: Advanced diagnostics for serious DIYers and professionals.
Expert Review: Topdon Phoenix Lite 2 Review
Key Specifications:
- Display: Color, 8-inch touchscreen
- Connectivity: Bluetooth, Wi-Fi
- Handheld: Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: Touchscreen interface
- Warranty: 2 years
- Dimensions: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Reasons to Buy:
- Professional-grade OBD scanner features
- Wireless operation with Wi-Fi and Bluetooth
- Large 8-inch touchscreen
- Extensive diagnostic tests and live data capabilities
- Includes adapters and a hard case
Reasons to Avoid:
- Bulky and heavy design
- High price point
- Subscription needed after two years for updates
The Topdon Phoenix Lite 2 is a high-end option that blurs the lines between amateur and professional OBD2 scan tools. While it comes with a significant price tag, it justifies the cost with a comprehensive suite of features, including wireless operation, a large touchscreen, and advanced diagnostic capabilities. Its robust design and professional-level features make it a worthwhile investment for those serious about car diagnostics. The Phoenix Lite 2 offers near-professional level functionality, making it an excellent choice for users who demand a good OBD2 scan tool capable of in-depth analysis.
Read our full Topdon Phoenix Lite 2 review
4. Ancel BD310: The Best Dual-Purpose Good OBD2 Scanner
Ancel BD310 (Image credit: Tom’s Guide)
Perfect For: Users wanting a scanner that also functions as a car performance monitor.
Expert Review: Ancel BD310 Review
Key Specifications:
- Display: Color, 2 inches
- Connectivity: Bluetooth
- Handheld: Yes
- 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
Reasons to Buy:
- Lightweight and compact
- Functions as both a scanner and a secondary car display
- Offers handheld and Bluetooth scanning
Reasons to Avoid:
- Minimalist interface
- Small screen size
The Ancel BD310 stands out as a good OBD2 scan tool for its dual functionality. It operates as a standard handheld scanner and can also connect to smartphones via Bluetooth to serve as an auxiliary display for engine data. Its compact size makes it highly portable, though the small screen and minimalist interface might be drawbacks for some users. However, for those valuing versatility and convenience in a good OBD2 scan tool, the BD310 is an excellent choice.
Read our full Ancel BD310 review
5. Carly OBD-II Scanner: The Best Companion App for a Good OBD2 Scan Tool
(Image credit: Carly)
Perfect For: Users who prioritize a feature-rich mobile app experience.
Expert Review: Carly OBD Scanner Review
Key Specifications:
- Display: None (app-based)
- Connectivity: Bluetooth
- Handheld: No
- I/M Readiness Test: No
- Live Data Display: Yes
- Keys: None (app-driven)
- Warranty: Lifetime
- Dimensions: 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 is distinguished by its exceptional companion app, which significantly enhances its functionality as a good OBD2 scan tool. While the scanner itself is capable, the app provides a superior user experience with extensive features, including repair assistance and used car checks. However, the full potential of Carly is car-dependent, and accessing advanced features requires a subscription, which can add to the overall cost. For users, especially those with compatible car brands like VW, BMW, and Ford, who value a comprehensive app experience, Carly is a top contender for a good OBD2 scan tool.
Read our full Carly OBD scanner review
Other OBD2 Scanners We Evaluated
Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a standout Bluetooth OBD2 scanner, inheriting Innova’s renowned features like predictive diagnostics in a wireless format. Its simple setup and robust functionality make it a compelling Bluetooth-only option.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 (★★★★☆)
Despite its larger size for a Bluetooth OBD2 scanner, the ThinkDiag TKD01 is remarkably durable. It offers extensive manufacturer-specific error codes and advanced fault-code analysis capable of 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 diagnosing electrical issues, featuring a built-in multimeter. It excels at identifying electrical faults and offers a wide range of live data and pre-inspection readiness checks.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions About Good OBD2 Scan Tools
What is an OBD2 Scanner?
An OBD2 scanner is a diagnostic tool that mechanics and car owners use to access information from a vehicle’s onboard computer system. Instead of manually dismantling parts to diagnose issues, these scanners plug into your car’s OBD port to read and interpret data. At their most basic, good OBD2 scan tools can identify error codes triggered by your car’s computer when it detects a problem. More advanced models offer real-time system monitoring and can even predict potential future issues, making them invaluable for preventative maintenance and comprehensive diagnostics.
What is the OBD2 Port?
The On-Board Diagnostics Version Two (OBD2) port is a standardized interface found in nearly all passenger vehicles sold in the United States since 1996, Canada since 1998, the European Union since 2004, and other regions including Australia, Mexico, and New Zealand since 2006. This port serves as the connection point between diagnostic tools and the car’s onboard computer. Besides OBD2 scanners, other devices like insurance black boxes and dash cams can also utilize this port.
If you’re unsure about the location of your OBD2 port, resources are available to help. For North American vehicles, you can find your car’s OBD2 port here. For worldwide locations, you can find your OBD2/EOBD port location here.
What is a DTC?
DTC stands for Diagnostic Trouble Code. These are error codes generated by a vehicle’s OBD system when it detects a malfunction or issue. Good OBD2 scan tools read these codes, allowing users to understand what’s happening within their vehicle. While many DTCs are standardized across vehicle makes and models, some manufacturers use proprietary codes specific to their vehicles.
Understanding DTC Meanings
DTCs may seem like random combinations of letters and numbers, but they follow a logical structure that can provide insight into the nature of the detected problem. The first character indicates the affected vehicle system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character is a digit, ‘0’ denoting a generic code and ‘1’ indicating 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 control
- 5: Vehicle speed control 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 further pinpoint the exact fault, ranging from 0 to 99. Good OBD2 scan tools translate these codes into understandable descriptions. While basic scanners provide fundamental explanations, advanced models offer more detailed information. Online resources and search engines like Google can also be valuable in deciphering DTCs, given the existence of over 5,000 possible codes.
It’s important to note that not all DTCs signal critical issues. While they can indicate serious problems, some codes may simply alert you to minor anomalies like slightly elevated engine temperature.
Choosing the Best Good OBD2 Scan Tool for Your Needs: A Buying Guide
For car owners seeking deeper insights into their vehicle’s operation and health, a good OBD2 scan tool is invaluable. These tools provide access to the same diagnostic information used by dealerships and repair shops, empowering you to understand and address car issues proactively. When selecting an OBD2 scanner, it’s important to recognize that not all tools are created equal. They generally fall into two categories:
Handheld OBD2 Scanners: These come with an integrated screen and a cable for direct connection to the OBD port.
Wireless OBD2 Scanners: These plug into the OBD port and connect wirelessly via Bluetooth to a smartphone or tablet for displaying data.
Regardless of the type, numerous high-quality OBD2 scanners are available for under $200, with some budget options priced below $30. The key is to find a good OBD2 scan tool that balances usability, features, and accuracy. Essential criteria to consider include:
- Ease of Setup: A good OBD2 scan tool should be easy and quick to set up, ensuring you can diagnose problems promptly without complicated procedures.
- Fault Code Explanation: Beyond just reading fault codes, a good scanner should explain what the codes mean, enabling you to decide on DIY repairs or inform a mechanic accurately.
- I/M Readiness Check: This feature verifies if your vehicle will pass state emissions inspections by running essential engine and emissions tests.
- Accuracy: Reliable diagnostic results are paramount. A good OBD2 scan tool must provide accurate readings to ensure correct diagnoses.
- Size and Ergonomics: For handheld scanners, consider size and weight for easy handling and storage in your car.
- Live Data Capability: Access to real-time engine data (speed, timing, etc.) is crucial for diagnosing intermittent issues.
- Data Visualization (Graphs): Graphical displays of live data can greatly enhance understanding and analysis, especially for comparing data over time.
- Warranty and Support: A good warranty, ideally lifetime or extended, along with software updates ensures your scanner remains useful and current with automotive technology changes.
When selecting a good OBD2 scan tool, first decide between a handheld unit with its own screen or a wireless model that uses your smartphone or tablet. Consider the longevity of the device, looking for lifetime warranties or software update provisions. For handheld scanners, prioritize screen size and clarity, opting for icon-based interfaces for ease of navigation. Ruggedness is also a factor, especially for those working in demanding environments.
Explore additional features such as built-in multimeters, manufacturer-specific code reading, and data export capabilities. The availability of professional-level features at consumer-friendly prices (under $100) makes investing in a good OBD2 scan tool a cost-effective decision compared to professional mechanic labor costs.
Our Testing Methodology for OBD2 Scanners
To ensure our recommendations are based on thorough evaluation, we rigorously tested each OBD2 scanner. Our testing process involved using a 2014 Audi A4 Allroad over several weeks in various conditions. We began by verifying each scanner’s ability to correctly identify the vehicle identification number (VIN).
For wireless scanners, we tested connectivity with devices like Apple iPad Pro, Microsoft Surface, and Samsung Galaxy S9+ via Bluetooth or Wi-Fi. Handheld scanners were tested simply by connecting them to the OBD2 port, which provides power. We assessed cable length for handheld units and wireless range for Bluetooth models.
During vehicle operation, we monitored engine performance and vital systems using each scanner. To test diagnostic accuracy, we simulated a fault by disconnecting the engine’s oil temperature sensor. We then evaluated the detail of the fault information provided by each scanner, proceeded to fix the simulated issue, cleared the check engine light, and erased the error code using the scanner.
Finally, we road-tested each scanner’s ability to display real-time operating data such as engine speed, timing, and coolant temperature. We noted whether data was presented numerically, graphically, or via gauge-style interfaces.
In understanding OBD2 fault codes, remember that each code consists of five characters: a letter prefix (P, B, C, or U) and four numbers. Generic codes (starting with ‘0’) are universal, while manufacturer-specific codes (starting with ‘1’) are unique to carmakers, often indicating more specific or nuanced issues. For example, a P0098 code typically points to an issue with the intake air temperature sensor, whereas a Ford-specific P1112 code indicates intermittent readings from the same sensor, suggesting replacement.
Further Resources from Tom’s Guide
Explore more car tech reviews and guides on Tom’s Guide to enhance your automotive knowledge and make informed decisions about vehicle technology.
