Unlocking your car’s hidden data is easier than ever with the Best Rated Obd2 Scanners. These ingenious devices connect to your vehicle’s onboard computer, providing you with 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 OBD2 scanner empowers you to diagnose issues like a pro, saving you time and potentially costly trips to the mechanic.
Navigating the world of OBD2 scanners can be daunting, especially with the sheer variety available. But don’t worry, we’ve put numerous OBD2 scanners to the test over the years to bring you a curated list of the top performers. Keep reading to discover our expert recommendations for the best rated OBD2 scanners on the market today, along with a helpful guide on how these tools work and what those cryptic error codes actually mean.
Our top selections include the Topdon TopScan, a wireless powerhouse packed with features for in-depth diagnostics, and the budget-friendly Launch CR529, offering exceptional value without compromising essential functionality. For those seeking a professional-grade experience, the Topdon Phoenix Lite 2 delivers advanced diagnostics capabilities, albeit at a premium price point.
Below are our hand-picked choices for the best rated OBD2 scanners you can buy right now, catering to a range of needs and budgets.
Tom Pritchard
Tom is the UK Phones Editor at Tom’s Guide, covering the latest in mobile tech and also a passionate advocate for electric vehicles.
Top Picks: The Best Rated OBD2 Scanners at a Glance
For a quick overview, here are the best rated OBD2 scanners based on our rigorous testing. Scroll down for detailed reviews and insights into each scanner’s strengths.
Topdon TopScan: Best Mobile OBD2 Scanner
1. Topdon TopScan: Best Mobile OBD2 Scanner
Effortless Bluetooth setup and professional-grade features combine in this compact, user-friendly scanner. The Topdon TopScan provides comprehensive diagnostics, repair guidance, parts information, and even predictive analysis to anticipate potential issues.
Dive Deeper into Topdon TopScan
Launch CR529: Best Budget OBD2 Scanner
2. Launch CR529: Best Budget OBD2 Scanner
The Launch CR529 is a small yet mighty OBD2 scanner, packed with essential features and even some higher-end capabilities typically found in more expensive models. Lifetime support and updates make it an unbeatable value.
Explore the Value of Launch CR529
Topdon Phoenix Lite 2: Best Professional OBD2 Scanner
3. Topdon Phoenix Lite 2: Best Professional OBD2 Scanner
The Topdon Phoenix Lite 2 boasts a rugged, tablet-like design reminiscent of a Nintendo Switch, making it durable and user-friendly. Designed for both professionals and experienced DIYers, it offers powerful scanning capabilities built to withstand demanding environments.
Discover the Power of Topdon Phoenix Lite 2
Ancel BD310: Best Dual-Purpose OBD2 Scanner
4. Ancel BD310: Best Dual-Purpose OBD2 Scanner
The Ancel BD310 stands out with its dual functionality: it serves as a standard OBD2 scanner and can also enhance your car’s dashboard by displaying real-time engine metrics. Its sleek design, smartphone compatibility, and affordable price make it a versatile choice.
Learn More About Ancel BD310’s Versatility
Carly OBD-II Scanner: Best OBD2 Scanner with Companion App
5. Carly OBD-II Scanner: Best OBD2 Scanner with Companion App
The Carly OBD-II Scanner’s value is highly dependent on your car make, with optimal performance for VW, BMW, and Ford vehicles. However, its standout feature is its exceptional companion app, offering extensive customization and professional-level diagnostic tests.
Explore the Carly OBD-II Scanner App Experience
Deep Dive: Exploring the Best Rated OBD2 Scanners
Why Trust Tom’s Guide? Our team of expert reviewers dedicates countless hours to evaluating products and services to provide you with unbiased and reliable recommendations. Discover more about our rigorous testing methodology.
1. Topdon TopScan: The Best Mobile OBD2 Scanner
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Topdon TopScan Review: Unleash Your Car’s Full Potential
Expert Verdict: The Topdon TopScan is a compact Bluetooth OBD2 scanner that belies its size with a wealth of advanced diagnostic capabilities, making it a top pick for mobile diagnostics.
Key Specifications:
- Display: None (App-based)
- Connectivity: Bluetooth
- Handheld: No
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: None (App-controlled)
- Warranty: 2 years
- Dimensions: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Extensive Vehicle Coverage: Provides comprehensive diagnostics across a wide range of vehicle makes and models.
- Real-time Live Data: Monitors crucial vehicle parameters in real-time for in-depth analysis.
- Performance Indicators: Offers unique performance metrics like horsepower and torque estimation.
- Maintenance Features: Covers essential maintenance functions, making it a versatile tool.
Reasons to Consider Alternatives:
- Larger Transmitter: The Bluetooth transmitter module is relatively bulky.
- Subscription for Full Features: Some advanced features require a subscription after the first year.
Despite its unassuming appearance, the Topdon TopScan packs a powerful punch. This Bluetooth OBD2 module goes far beyond basic error code reading, offering performance and efficiency checks that are rare in scanners at this price point. It’s an excellent choice for car enthusiasts and everyday drivers alike, whether you’re looking to optimize your vehicle’s performance or ensure its long-term reliability.
Read our comprehensive Topdon TopScan review for a deeper dive.
2. Launch CR529: The Best Cheap OBD2 Scanner
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Launch CR529 Review: Unbeatable Value in OBD2 Diagnostics
Expert Verdict: The Launch CR529 redefines value in OBD2 scanners, delivering impressive diagnostic features typically found in higher-priced models, all at a remarkably affordable price.
Key Specifications:
- Display: 2.8-inch Color Screen
- Connectivity: Handheld (Cable)
- Bluetooth: No
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: 8 Physical Buttons
- Warranty: 1 Year
- Dimensions: 6.5 x 3.8 x 1.2 inches
- Weight: 11 ounces
Reasons to Buy:
- Exceptional Affordability: One of the most budget-friendly OBD2 scanners without sacrificing core features.
- Lifetime Updates: Ensures long-term compatibility and access to the latest features.
- Pre-Inspection Report: Simplifies emissions testing preparation.
Reasons to Consider Alternatives:
- Limited Manufacturer-Specific Codes: Lacks advanced codes for specific car manufacturers.
- Heavier Build: Feels somewhat weighty compared to more compact scanners.
- Shorter Warranty: Comes with a 1-year warranty, shorter than some competitors.
The Launch CR529 proves that you don’t have to spend a fortune to get a capable OBD2 scanner. Despite its budget-friendly price tag, it offers a surprising level of diagnostic functionality, including live data and in-depth vehicle insights. While it may not have all the bells and whistles of professional-grade scanners, the CR529 is an outstanding choice for everyday car owners seeking reliable diagnostics on a budget.
Explore our full Launch CR529 review for a detailed analysis.
3. Topdon Phoenix Lite 2: The Best Professional OBD2 Scanner
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(Image credit: Future)
Topdon Phoenix Lite 2 Review: Professional-Grade Diagnostics for Amateurs and Experts
Expert Verdict: The Topdon Phoenix Lite 2 bridges the gap between amateur and professional OBD2 diagnostics, offering a powerful and versatile tool suitable for both experienced mechanics and serious DIY enthusiasts.
Key Specifications:
- Display: 8-inch Color Touchscreen
- Connectivity: Bluetooth, Wi-Fi, Handheld (Wireless)
- Bluetooth: 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:
- Near-Professional Capabilities: Offers advanced diagnostic features comparable to professional-grade scanners.
- Wireless and Versatile: Combines handheld convenience with wireless Bluetooth and Wi-Fi connectivity.
- Large Touchscreen Display: Features a vibrant 8-inch touchscreen for easy navigation and data viewing.
- Extensive Diagnostic Tests: Supports a wide array of diagnostic tests and live data parameters.
- Comprehensive Kit: Includes adapters and a protective hard case for added value and portability.
Reasons to Consider Alternatives:
- Higher Price Point: More expensive than many other OBD2 scanners on the market.
- Bulky and Heavy: Larger and heavier than more compact handheld scanners.
- Subscription for Updates After 2 Years: Firmware updates require a subscription after the initial 2-year period.
The Topdon Phoenix Lite 2 is a premium OBD2 scanner that delivers near-professional diagnostic capabilities in a user-friendly package. Its wireless design, large touchscreen, and extensive features make it a powerful tool for in-depth vehicle analysis. While it comes at a higher cost, the Phoenix Lite 2 is a worthwhile investment for those seeking advanced diagnostics and comprehensive vehicle insights.
Read our in-depth Topdon Phoenix 2 Lite review for a complete assessment.
4. Ancel BD310: The Best Dual-Purpose OBD2 Scanner
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Ancel BD310 Review: OBD2 Scanning and Secondary Display in One
Expert Verdict: The Ancel BD310 offers a unique dual-purpose functionality, serving as both a reliable OBD2 scanner and a customizable secondary display for your car’s vital engine data.
Key Specifications:
- Display: 2-inch Color Screen
- Connectivity: Bluetooth, Handheld (Cable)
- Bluetooth: Yes
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Keys: 4 Physical Buttons
- Warranty: 3 Years
- Dimensions: 5.1 x 2.4 x 0.6 inches
- Weight: 5.4 ounces
Reasons to Buy:
- Lightweight and Compact: Easily portable and storable in your glove compartment.
- Dual Functionality: Operates as both an OBD2 scanner and a secondary car display.
- Versatile Connectivity: Supports both handheld and Bluetooth scanning options.
Reasons to Consider Alternatives:
- Minimalist Interface: The interface may be too simplistic for some users.
- Smaller Screen: The 2-inch display can feel cramped for viewing detailed data.
The Ancel BD310 stands out with its innovative dual functionality. Beyond its core OBD2 scanning capabilities, it can connect to your smartphone via Bluetooth and project real-time engine parameters onto its display, effectively acting as a secondary dashboard. Its compact size and dual-purpose nature make it a convenient and versatile tool for car owners.
Explore our full Ancel BD310 review for a comprehensive evaluation.
5. Carly OBD-II Scanner: The Best OBD2 Scanner with a Companion App
(Image credit: Carly)
Carly OBD Scanner Review: App-Driven OBD2 Diagnostics Tailored to Your Car
Expert Verdict: The Carly OBD Scanner excels with its exceptional companion app, offering a user-friendly and feature-rich experience, although its overall value depends heavily on your specific car make and model.
Key Specifications:
- Display: None (App-based)
- Connectivity: Bluetooth
- Handheld: No
- I/M Readiness Test: No
- Live Data Display: Yes
- Keys: None (App-controlled)
- Warranty: Lifetime
- Dimensions: 2.9 x 1.5 x 0.7 inches
- Weight: 0.7 ounces
Reasons to Buy:
- User-Friendly App: Features an intuitive and well-designed companion app.
- Customization Options: Offers extensive customization and personalization within the app.
- Live Data and Repair Help: Provides real-time data monitoring and repair guidance.
- Lifetime Warranty and Updates: Offers long-term support and access to the latest features.
Reasons to Consider Alternatives:
- Car Model Dependent Functionality: Feature availability varies significantly depending on your car’s make and model (best for VW, BMW, and Ford).
- Subscription Costs: Full feature access requires an ongoing subscription, which can become expensive.
The Carly OBD Scanner distinguishes itself with its outstanding companion app, setting a new standard for user experience in OBD2 diagnostics. The app provides a wealth of features, from basic code reading to advanced customization and repair assistance. However, it’s crucial to verify compatibility with your specific car model to ensure you can fully utilize Carly’s capabilities.
Read our complete Carly OBD scanner review for a detailed assessment of its app and performance.
Other OBD2 Scanners We’ve Tested
Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a highly innovative Bluetooth OBD2 scanner, inheriting Innova’s renowned features like predictive diagnostics in a wireless, phone-based format. Its incredibly simple setup process further enhances its appeal as a Bluetooth-only option.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 (★★★★☆)
Despite its larger size for a Bluetooth OBD2 scanner, the ThinkCar ThinkDiag TKD01 is remarkably robust and durable. Key benefits include access to extensive manufacturer-specific error codes and advanced fault-code analysis that can resolve minor issues without professional mechanic intervention. However, a $40 subscription is required after the first year.
Read our full ThinkCar ThinkDiag TKD01 review.
Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 OBD2 scanner is specifically designed for diagnosing electrical problems, enhanced by its integrated multimeter. This allows it to identify issues like damaged wiring, short circuits, and blown fuses. It also provides a wide range of live data and pre-inspection readiness check capabilities.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions About OBD2 Scanners
What is an OBD2 Scanner?
OBD2 scanners are diagnostic tools that mechanics and car owners use to access information from a vehicle’s onboard computer system. Instead of manually inspecting every component, scanners connect to the OBD port and retrieve data about the car’s health and any potential issues.
At their most basic, OBD2 scanners read and interpret Diagnostic Trouble Codes (DTCs) flagged by the car’s computer when it detects a problem. More advanced scanners offer real-time system monitoring and may even predict future maintenance needs.
What is the OBD2 Port?
The On-Board Diagnostics Version Two (OBD2) port is a standardized connector found in virtually all passenger vehicles sold in the United States since 1996, Canada since 1998, the European Union since 2004, and Australia, Mexico, and New Zealand since 2006.
This port serves as the interface between diagnostic tools and the car’s computer. Besides OBD2 scanners, other devices like insurance trackers and dashcams can also utilize the OBD2 port.
If you’re unsure of your OBD2 port’s location, consult resources on finding your car’s OBD2 port in North American vehicles or worldwide OBD2/EOBD port locations.
What is a DTC (Diagnostic Trouble Code)?
A DTC, or Diagnostic Trouble Code, is an error code generated by a vehicle’s OBD system when it identifies a malfunction or issue. These codes are read by OBD2 scanners, allowing users to understand the nature of the problem. While many DTCs are standardized across vehicle manufacturers, some are manufacturer-specific, providing more detailed information for particular makes or models.
Understanding DTC Meanings
DTCs may appear as a jumble of letters and numbers, but they follow a structured format to convey information about the detected problem.
- First Character (Letter): Indicates the affected vehicle system:
- P: Powertrain (engine, transmission)
- B: Body (interior, electrical accessories)
- C: Chassis (brakes, suspension, steering)
- U: Network (communication systems)
- Second Character (Number): Specifies code type:
- 0: Generic (standardized across manufacturers)
- 1: Manufacturer-specific (unique to a particular brand)
- Third Character (Number or Letter): Identifies the specific 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 Controls and Idle Control Systems
- 6: Computer Auxiliary Outputs
- 7, 8, 9: Transmission and Gearbox Faults
- A, B, C: Hybrid Propulsion System Faults
- Fourth and Fifth Characters (Numbers): Provide further detail about the specific fault (ranging from 0 to 99).
OBD2 scanners typically provide descriptions of DTC meanings, and advanced models offer more in-depth information. Online resources like Google can also be valuable for deciphering DTCs, as there are over 5,000 potential codes.
It’s important to note that not all DTCs indicate critical issues. Some may simply alert you to minor problems like a slightly elevated engine temperature.
Choosing the Best Rated OBD2 Scanner: Key Considerations
For gaining valuable insights into your car’s operation and troubleshooting issues, a top-rated OBD2 scanner is an indispensable tool. These devices provide access to the same diagnostic information used by dealerships and repair shops, empowering you with knowledge and control over your car’s maintenance.
When selecting an OBD2 scanner, consider these key factors:
Handheld vs. Wireless:
- Handheld OBD2 Scanners: Feature an integrated screen and a cable for direct connection to the OBD port.
- Wireless OBD2 Scanners: Plug into the OBD port and connect wirelessly via Bluetooth to a smartphone or tablet for data display.
Essential Features to Look For:
- Ease of Setup: A user-friendly setup process ensures you can quickly diagnose problems when needed.
- Fault Code Explanation: The best scanners not only display fault codes but also provide clear explanations to aid in diagnosis and repair decisions.
- I/M Readiness Check: This feature verifies if your car’s emissions systems are ready for inspection, saving you potential headaches.
- Accuracy: Reliable and accurate readings are paramount for effective diagnostics.
- Size and Weight: A compact and lightweight scanner is more convenient for storage and on-the-go use.
- Live Data Streaming: Real-time monitoring of engine parameters helps pinpoint intermittent issues.
- Data Graphing: Visual data representations like graphs can enhance data analysis and comparison.
- Warranty: A solid warranty provides peace of mind and reflects the manufacturer’s confidence in the product’s durability. Lifetime warranties are particularly valuable.
Additional Features to Consider:
- Screen Size and Clarity (Handheld Scanners): Opt for a large, bright, and easy-to-read display, preferably with icon-based navigation.
- Ruggedness: If you work in demanding environments, consider a rugged scanner with protective bumpers.
- Extra Features: Some scanners offer added functionalities like electrical multimeters, manufacturer-specific code reading, and PDF report export.
- Price: While professional-level features are available at various price points, excellent scanners can be found for under $100, making them a cost-effective investment compared to professional mechanic labor.
How We Test OBD2 Scanners
To determine the best rated OBD2 scanners, we conduct rigorous real-world testing over several weeks. Our testing process involves:
- Vehicle Compatibility: Connecting each scanner to a 2014 Audi A4 Allroad to verify VIN reporting and general compatibility.
- Connectivity Testing: Evaluating Bluetooth and Wi-Fi connections for wireless scanners with devices like iPads, Microsoft Surface tablets, and Samsung Galaxy S9+ phones. Handheld scanners are assessed for cable length and ease of connection.
- Live Data Monitoring: Running the car and monitoring engine and vital systems to assess real-time data display and accuracy.
- Fault Code Generation and Reading: Simulating a fault by disconnecting the engine oil temperature sensor to test the scanner’s ability to detect, display, and explain error codes.
- Fault Resolution and Code Clearing: Resolving the simulated fault, turning off the check engine light, and verifying the scanner’s ability to clear error codes.
- Road Testing: Driving the vehicle to evaluate the scanner’s performance in displaying dynamic operating data like engine speed, timing, and coolant temperature, and assessing data presentation formats (numbers, graphs, gauges).
Our comprehensive testing methodology ensures that our recommendations for the best rated OBD2 scanners are based on thorough evaluation and real-world performance.
