Unlocking the hidden diagnostics of your vehicle is easier than ever with the Best Obd Scanner. These ingenious devices act as a bridge to your car’s onboard computer, granting you access to a wealth of information about its health and performance. Whether you’re facing a mysterious dashboard light or simply want to understand your car better, an OBD-II scanner empowers you to diagnose issues like a pro, potentially saving you money on mechanic fees.
However, navigating the world of OBD-II scanners can be daunting, especially for beginners. The market is flooded with options, each boasting different features and capabilities. Having rigorously tested a wide array of OBD-II scanners over the years, we’ve compiled a list of the top contenders that are truly worth your investment. Keep reading to discover our expert recommendations and gain a deeper understanding of how OBD-II scanners work and what those cryptic error codes actually signify.
Our curated selection includes the Topdon TopScan, a wireless marvel packed with features for in-depth diagnostics. For budget-conscious users, the Launch CR529 offers exceptional value without compromising essential functionalities. And for those seeking professional-grade diagnostics, the Topdon Phoenix Lite 2 delivers an experience akin to what professional mechanics use, albeit at a premium price.
Below are our top selections for the best OBD scanner currently available, catering to a range of needs and budgets.
Tom Pritchard
Tom is the UK Phones Editor at Tom’s Guide, bringing expertise in mobile technology and a passion for electric vehicles to the world of automotive tech.
Quick Guide to the Best OBD Scanners
This is a snapshot of the best OBD scanners you can buy today, based on our hands-on evaluations. Scroll down for detailed reviews of each product and insights into their standout features.
Topdon TopScan: Best Mobile OBD Scanner
1. Topdon TopScan
The Topdon TopScan distinguishes itself as the most user-friendly Bluetooth scanner we tested. Its compact design belies a wealth of professional-grade features, including comprehensive diagnostics, repair guides, parts information, and even predictive analysis to anticipate potential issues.
Dive Deeper into the TopScan
Launch CR529: Best Budget OBD Scanner
2. Launch CR529
The Launch CR529 is a powerhouse in a small package. It provides all the essential OBD-II scanner functions, along with advanced features typically found in higher-priced models. Lifetime support and updates further enhance its exceptional value.
Explore the Launch CR529’s Value
Topdon Phoenix Lite 2: Best Professional OBD Scanner
3. Topdon Phoenix Lite 2
Resembling a robust handheld gaming console, the Topdon Phoenix Lite 2 is built for both professionals and serious DIYers. This rugged device offers powerful scanning capabilities designed to withstand demanding workshop environments.
Discover the Power of the Phoenix Lite 2
Ancel BD310: Best Dual-Purpose OBD Scanner
4. Ancel BD310
The Ancel BD310 is a versatile tool that functions as both an OBD-II scanner and an auxiliary dashboard display. Its sleek design, smartphone compatibility, and affordable price make it a compelling choice.
Learn More About the Ancel BD310’s Versatility
Carly OBD-II Scanner: Best OBD Scanner with Companion App
5. Carly OBD-II Scanner
The Carly OBD-II Scanner stands out with its exceptional companion app, offering extensive customization and professional-level tests, especially for VW, BMW, and Ford vehicles.
Explore the Carly OBD Scanner and App
Finding the Best OBD Scanner for Your Needs
Why Trust Tom’s Guide? Our team of expert reviewers dedicates countless hours to evaluating products and services to bring you unbiased and reliable recommendations. Learn more about our rigorous testing process.
Best Mobile OBD Scanner: Topdon TopScan
(Image credit: Topdon)
1. Topdon TopScan
Ideal for Deep Car Diagnostics
Read our in-depth review of the Topdon TopScan
Key Specifications:
- Display: None (App-based)
- Connectivity: Bluetooth
- Handheld: No
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Warranty: 2 years
- Size: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Extensive vehicle diagnostic coverage
- Real-time live data monitoring
- Unique performance indicators
- Comprehensive maintenance features
Reasons to Consider Other Options:
- Larger transmitter module
- Advanced features may require subscription after the first year
Don’t let its unassuming appearance fool you; the Topdon TopScan is a powerhouse in a compact form. This Bluetooth OBD-II module transcends the capabilities of standard scanners in its class. Beyond basic fault code reading and I/M Readiness tests, the TopScan excels at performance and efficiency analysis, even estimating horsepower and torque. Its advanced features rival those of scanners ten times its price, making it an invaluable tool for both car enthusiasts and everyday owners focused on vehicle maintenance and performance optimization.
Read our comprehensive Topdon TopScan review
Best Budget OBD Scanner: Launch CR529
(Image credit: Future)
2. Launch CR529
Unbeatable Value Under $50
Explore our expert review of the Launch CR529
Key Specifications:
- Display: 2.8-inch Color Screen
- Connectivity: Cable
- Handheld: Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Warranty: 1 year
- Size: 6.5 x 3.8 x 1.2 inches
- Weight: 11 ounces
Reasons to Buy:
- Exceptionally affordable
- Lifetime free updates
- Convenient pre-inspection report feature
Reasons to Consider Other Options:
- Lacks manufacturer-specific advanced codes
- Feels somewhat heavy
- Shorter 1-year warranty
The Launch CR529 redefines value in OBD-II scanners. For a remarkably low price, it delivers a suite of diagnostic features that exceed expectations. While compromises are inherent at this price point, such as the absence of manufacturer-specific codes and a slightly hefty feel, the CR529 compensates with essential functionalities like live data, instant inspection reports, and impressive insights into your vehicle’s operation. The inclusion of lifetime updates is a significant advantage, ensuring long-term usability without subscription fees. While not tailored for professional mechanics, the CR529 is an excellent choice for most car owners seeking a reliable and affordable best OBD scanner for their toolbox.
Read our full Launch CR529 review
Best Professional OBD Scanner: Topdon Phoenix Lite 2
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(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)
3. Topdon Phoenix Lite 2
Bridging the Gap Between DIY and Professional Diagnostics
Explore our expert evaluation of the Topdon Phoenix Lite 2
Key Specifications:
- Display: 8-inch Color Touchscreen
- Connectivity: Bluetooth, Wi-Fi
- Handheld: Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Warranty: 2 years
- Size: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Reasons to Buy:
- Professional-grade OBD scanner features
- Wireless handheld operation with Wi-Fi and Bluetooth
- Large 8-inch touchscreen display
- Extensive suite of diagnostic tests and live data options
- Includes adapters and a protective hard case
Reasons to Consider Other Options:
- Higher price point
- Bulky and heavy design
- Subscription required for updates after two years
The Topdon Phoenix Lite 2 commands a higher price than many OBD-II scanners, but it justifies the investment with a wealth of advanced features suitable for both experienced DIYers and professional mechanics. This scanner offers a truly wireless experience, connecting to your vehicle via Bluetooth while providing a robust handheld control pad. Its rugged design and included kickstand are ideal for workshop environments. Beyond standard fault code reading, the Phoenix Lite 2 boasts advanced capabilities like live data graphing and comprehensive fault information. While the two-year update subscription after the initial period is a factor to consider, the Topdon Phoenix Lite 2 delivers near-professional diagnostic power in a user-friendly package, making it a top contender for the best OBD scanner in its category.
Read our in-depth Topdon Phoenix 2 Lite review
Best Dual-Purpose OBD Scanner: Ancel BD310
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
OBD-II Scanning with Secondary Display Functionality
Explore our expert review of the Ancel BD310
Key Specifications:
- Display: 2-inch Color Screen
- Connectivity: Bluetooth, Cable
- Handheld: Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Warranty: 3 years
- Size: 5.1 x 2.4 x 0.6 inches
- Weight: 5.4 ounces
Reasons to Buy:
- Lightweight and compact for portability
- Functions as both a scanner and a secondary car display
- Offers both handheld and Bluetooth scanning options
Reasons to Consider Other Options:
- Minimalist interface design
- Small 2-inch screen
The Ancel BD310 distinguishes itself as a dual-purpose OBD scanner, functioning as a standard handheld device and also connecting to smartphones via Bluetooth. Its unique capability to transform into a secondary dashboard display, showing vital engine data, sets it apart. The BD310’s compact and lightweight design makes it incredibly portable, easily fitting in a glovebox. While the 2-inch screen is small and the four-button interface is somewhat basic, these design choices contribute to its portability and ease of use. Its 56-inch cable provides ample reach, and it performs essential functions like I/M readiness tests and displays performance data. The Ancel BD310 is a practical and versatile best OBD scanner for users seeking a compact and multi-functional tool.
Read our full Ancel BD310 review
Best OBD Scanner with Companion App: Carly OBD-II Scanner
(Image credit: Carly)
5. Carly OBD-II Scanner
Unlock Advanced Features with a Powerful App
Read our expert review of the Carly OBD scanner
Key Specifications:
- Display: None (App-based)
- Connectivity: Bluetooth
- Handheld: No
- I/M Readiness Test: No
- Live Data Display: Yes
- Warranty: Lifetime
- Size: 2.9 x 1.5 x 0.7 inches
- Weight: 0.7 ounces
Reasons to Buy:
- User-friendly and intuitive app interface
- Extensive customization options within the app
- Real-time live data display
- Covers maintenance and repair functions
- Lifetime warranty and software updates
Reasons to Consider Other Options:
- Feature availability varies by car model
- Subscription required for advanced app features
The Carly OBD Scanner excels with its exceptional companion app, offering a user experience far beyond basic Bluetooth scanners. This scanner is particularly advantageous for owners of VW, BMW, and Ford vehicles, unlocking a wide array of customization options and professional-level diagnostic tests. Beyond basic fault diagnosis, the Carly app provides repair assistance and tools to assess used vehicles. A standout feature is the lifetime warranty, a rare and valuable offering. However, feature compatibility varies across car models, and accessing advanced functions necessitates a subscription, which can be an added cost. Despite these considerations, the Carly OBD-II Scanner, with its feature-rich app, ranks among the best OBD scanner options for users seeking in-depth vehicle control and information.
Read our full Carly OBD scanner review
Other OBD-II Scanners We’ve Tested
- Innova CarScan Mobile 1000 (★★★★☆): This innovative Bluetooth OBD-II scanner delivers impressive Innova features, including predictive diagnostics, wirelessly through your smartphone. Its simple setup further enhances its appeal as a Bluetooth-only option. Read the full Innova CarScan Mobile 1000 review
- ThinkCar ThinkDiag TKD01 (★★★★☆): While larger than typical Bluetooth OBD-II scanners, the TKD01 boasts exceptional durability. It offers a wide range of manufacturer-specific error codes and extended fault-code functionalities that can resolve minor issues automatically. A subscription of $40 per year is required after the first year. Read our full ThinkCar ThinkDiag TKD01 review.*
- Autel AutoLink AL539 (★★★☆☆): Specifically designed for electrical diagnostics, this OBD-II scanner includes a built-in multimeter to identify electrical issues like burnt cables and shorts. It also offers extensive 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?
Mechanics use OBD-II scanners as essential diagnostic tools. Instead of manually disassembling a car to find problems, they connect a scanner to the car’s OBD port, accessing the onboard computer’s data. Basic OBD-II scanners read and interpret error codes generated by the car when it detects an issue. Advanced scanners offer real-time system monitoring and even predict potential future problems, making them invaluable for preventative maintenance and diagnostics.
What is the OBD-II Port?
The On-Board Diagnostics Version Two (OBD-II) port is a standardized port found in nearly all passenger vehicles sold in the US since 1996, Canada since 1998, the EU since 2004, and other regions like Australia and New Zealand since 2006. This port serves as the interface point to the car’s computer system. Besides OBD-II scanners, it’s used for various devices like insurance trackers and dashcams. If you’re unsure of its location, you can find guides on locating the OBD-II port in North American cars and worldwide OBD-II/EOBD port locations.
What is a DTC?
DTC stands for Diagnostic Trouble Code. These error codes are generated by a car’s OBD system when it detects a malfunction. OBD-II scanners read these codes to help users identify vehicle problems. Many DTCs are standardized across vehicle makes and models, while some manufacturers use proprietary DTCs specific to their vehicles.
Understanding DTC Meanings
DTCs might seem cryptic at first glance, composed of letters and numbers. However, they follow a logical structure to indicate the type and location of the problem.
- The first letter indicates the affected system: P (Powertrain), B (Body), C (Chassis), N (Network).
- The second character is a number: 0 for generic codes, 1 for manufacturer-specific codes.
- 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: Vehicle speed control and idle control
- 6: Computer auxiliary outputs
- 7, 8, 9: Transmission and gearbox faults
- A, B, C: Hybrid propulsion faults
- The fourth and fifth characters pinpoint the exact fault, ranging from 0 to 99.
OBD-II scanners translate these codes into understandable descriptions. Advanced models provide more detailed information. While scanners help decode DTCs, further research using resources like Google might be necessary, given the existence of over 5,000 potential DTCs. It’s important to note that not all DTCs signify critical issues; some may indicate minor problems like slightly elevated engine temperature.
Choosing the Best OBD Scanner for You
Using a best OBD scanner is the most effective way to understand your vehicle’s health and diagnose potential issues. It’s the same method dealerships and repair shops use. Why not access this information yourself?
OBD-II scanners come in two primary 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 connect wirelessly via Bluetooth to smartphones or tablets for displaying data.
Regardless of the type, many high-performing best OBD scanners are available for under $200, with some costing less than $30. Key factors to consider include:
- Easy Setup: A user-friendly setup is crucial for quick diagnostics.
- Fault Code Explanation: The scanner should not only identify fault codes but also explain their meaning for informed decisions.
- I/M Readiness Check: Essential for emissions testing, this feature verifies if your car will pass inspection.
- Accuracy: Reliable results are paramount for accurate diagnosis.
- Size and Weight: Portability ensures the scanner is readily available when needed.
- Live Data: Real-time data monitoring helps pinpoint intermittent issues.
- Graphs: Visual data representation enhances analysis, especially for before-and-after comparisons.
- Warranty: A long warranty, ideally lifetime, ensures long-term value.
When selecting the best OBD scanner, decide between handheld and wireless based on your preference. Prioritize longevity with lifetime warranties or software updates. For handheld scanners, a large, clear, icon-based display is beneficial. Rugged models offer added durability. Consider extra features like multimeters or manufacturer-specific code reading. With sophisticated best OBD scanners available for under $100, it’s a cost-effective investment compared to mechanic labor.
Our OBD Scanner Testing Methodology
To rigorously evaluate best OBD scanners, we tested them on a 2014 Audi A4 Allroad over several weeks in various driving conditions. We verified VIN reporting upon connection to the OBD-II port. Wireless scanners were tested with Apple iPads, Microsoft Surfaces, and Samsung Galaxy phones via Bluetooth or Wi-Fi. Handheld scanner cord lengths and wireless ranges were measured. Engine and system data were monitored during car operation. We simulated a fault by disconnecting the oil temperature sensor to assess diagnostic accuracy, fault code reporting, and the scanner’s ability to clear codes and turn off the check engine light. Road tests were conducted to evaluate live data display, including engine speed, timing, and coolant temperature, noting data presentation as numbers, graphs, or gauges. This comprehensive testing process ensures our recommendations for the best OBD scanner are based on thorough, real-world performance evaluations.
