Your car’s onboard computer holds a wealth of information, acting as its central nervous system, constantly monitoring performance and flagging issues. When that mysterious check engine light illuminates or you suspect something isn’t quite right, accessing this data is crucial. That’s where the Highest Rated Obd2 Scanner comes into play. These ingenious devices act as interpreters, connecting to your car’s OBD-II port and translating the complex language of your vehicle’s computer into understandable diagnostics, all without the need for expensive professional mechanic visits right away.
Navigating the world of OBD-II scanners can be daunting, especially for beginners. The market is flooded with options, each promising to be the best. But fear not, at carparteu.com, we’ve rigorously tested a wide array of OBD-II scanners over years of hands-on evaluations. We understand what makes a scanner truly exceptional, and we’re here to guide you to the highest rated OBD2 scanner that meets your needs.
Whether you’re a seasoned DIY enthusiast or a car owner simply seeking to understand your vehicle better, investing in a top-tier OBD-II scanner is a smart move. From pinpointing the cause of that nagging dashboard light to proactively monitoring your car’s health, the right scanner empowers you with knowledge and control.
Among our top performers, the Topdon TopScan stands out for its wireless convenience and surprisingly robust diagnostic capabilities. For budget-conscious users, the Launch CR529 offers exceptional value without sacrificing essential features. And for those seeking a professional-grade experience, the Topdon Phoenix Lite 2 delivers advanced diagnostics akin to what you’d find in a mechanic’s shop.
Below, we present our curated list of the highest rated OBD2 scanners available today. We delve into each scanner’s strengths, features, and why they earned their place at the top. We also break down how OBD-II scanners work and demystify those cryptic error codes, ensuring you’re well-equipped to take charge of your car’s diagnostics.
Here are our top picks for the highest rated OBD2 scanners you can buy right now.
Tom Pritchard
Tom is the Tom’s Guide UK Phones Editor, covering everything from new hardware to the best mobile apps. He’s also an avid electric car enthusiast, and will argue to the death in their defense.
The Quick List: Top Highest Rated OBD2 Scanners
Here are the highest rated OBD2 scanners you can purchase right now, based on our extensive hands-on testing. Continue scrolling to explore detailed insights into each model and discover what makes them excel.
1. Topdon TopScan: Highest Rated Mobile OBD2 Scanner
Effortless Bluetooth setup and professional-grade features packed into a compact design. Offers comprehensive diagnostics, repair guidance, parts listings, and predictive analysis for potential issues.
2. Launch CR529: Highest Rated Cheap OBD2 Scanner
Compact yet potent, delivering essential OBD-II scanner functionalities alongside high-end features typically found in pricier models. Includes lifetime support and updates, offering exceptional value.
3. Topdon Phoenix Lite 2: Highest Rated Rugged & Professional OBD2 Scanner
Robust and built for both professionals and enthusiasts, this scanner boasts a rugged design akin to a Nintendo Switch. Powerful capabilities for in-depth diagnostics in demanding environments.
4. Ancel BD310: Highest Rated Dual-Purpose OBD2 Scanner
Versatile as both an OBD-II scanner and an auxiliary dashboard display, offering engine specifications and smartphone compatibility at a reasonable price.
5. Carly OBD-II Scanner: Highest Rated OBD2 Scanner with Companion App
Unlock extensive features depending on your car make (especially VW, BMW, and Ford). Features an outstanding companion app with customization and professional-level tests.
What Makes These OBD-II Scanners the Highest Rated?
At carparteu.com, our reviews are built on trust and rigorous testing. Our team of experts dedicates countless hours to evaluating products, services, and apps to pinpoint the very best for you. Learn more about our testing, analysis, and rating methodology.
1. Topdon TopScan: Detailed Review – Highest Rated Mobile OBD2 Scanner
(Image credit: Topdon)
Topdon TopScan Expert Review
Perfect for Unlocking Your Car’s Full Diagnostic Potential
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:
- Exceptional automotive diagnostic coverage
- Real-time live data monitoring
- Unique performance indicators
- Comprehensive maintenance item coverage
Reasons to Avoid:
- Bulky transmitter unit
- Subscription required for some features after the first year
The Topdon TopScan might appear unassuming at first glance, but this compact scanner packs a punch far beyond its size. It’s not just a typical Bluetooth OBD-II module that relays basic car data to your phone app. We were impressed by its capabilities, which surpass many competitors in its class, making it a highest rated OBD2 scanner in the mobile category.
Beyond basic fault finding and I/M Readiness tests, the TopScan excels in performance and efficiency analysis. Remarkably, it can even estimate your car’s horsepower and torque – features often absent in even pricier OBD-II scanners. Whether you’re aiming to fine-tune your vehicle’s performance or ensure its roadworthiness, the TopScan is an invaluable tool for your automotive toolkit.
Read our in-depth Topdon TopScan review
2. Launch CR529: Detailed Review – Highest Rated Cheap OBD2 Scanner
(Image credit: Future)
Launch CR529 Expert Review
The Best 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:
- Extremely affordable
- Lifetime free updates
- Convenient pre-inspection report feature
Reasons to Avoid:
- Lacks manufacturer-specific specialty codes
- Feels somewhat heavy
- 1-year warranty period
In our expert opinion, the Launch CR529 is arguably the highest rated cheap OBD2 scanner on the market. Its incredibly low price point of under $50 is just the beginning; the level of diagnostic capabilities it offers at this price is truly remarkable. We were genuinely surprised by the features packed into such an affordable device.
While compromises are expected at this price, such as the absence of manufacturer-specific codes and a slightly heavier feel, the CR529 delivers essential functionalities. It provides live data, an instant inspection feature, and surprisingly detailed insights into your car’s inner workings. The inclusion of lifetime updates further enhances its value, ensuring long-term usability without subscription fees.
While the CR529 might not cater to professional mechanics seeking advanced features, it’s an excellent choice for everyday car owners and DIYers looking for a reliable and highest rated cheap OBD2 scanner to keep in their toolbox.
Read our comprehensive Launch CR529 review
3. Topdon Phoenix Lite 2: Detailed Review – Highest Rated Pro-Level OBD2 Scanner
Topdon Phoenix Lite 2 OBD2 scanner being used on a car engine, highlighting its professional-level capabilities as a highest rated pro-level scanner.
(Image credit: Future)
Topdon Phoenix Lite 2 Expert Review
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:
- Professional-grade OBD scanner features
- Versatile handheld with Wi-Fi and Bluetooth connectivity
- Large 8-inch touchscreen display
- Extensive range of diagnostic tests and live data
- Includes adapters and a protective hard case
Reasons to Avoid:
- Large, heavy, and can be cumbersome
- Higher price point
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 commands a higher price than many other OBD-II scanners, but it justifies the investment with a wealth of features and capabilities, earning its place as a highest rated pro-level OBD2 scanner. It’s designed to cater to both amateur car enthusiasts and professional mechanics, offering a near-professional diagnostic experience.
Its wireless design is a standout feature, with the control pad connecting via Bluetooth to a receiver in your car’s OBD port, allowing for unrestricted movement around the vehicle. While the scanner itself is substantial in size and weight, it includes a kickstand and rugged construction to withstand workshop environments.
The Phoenix Lite 2 boasts advanced features like live data graphing, detailed fault information, and a suite of sophisticated diagnostic tools rarely found in budget scanners. However, note that firmware updates are included for two years, after which a yearly subscription of $495 is required.
Explore our detailed Topdon Phoenix 2 Lite review
4. Ancel BD310: Detailed Review – Highest Rated Dual-Purpose OBD2 Scanner
Ancel BD310 (Image credit: Tom’s Guide)
Ancel BD310 Expert Review
A Handy OBD-II Scanner That Performs Double Duty
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 design
- Functions as both a scanner and a secondary car display
- Offers handheld and Bluetooth scanning options
Reasons to Avoid:
- Minimalist interface design
- Small screen size
The Ancel BD310 distinguishes itself as a dual-purpose scanner, functioning as a standard handheld device and connecting to smartphones via Bluetooth, making it a highest rated dual-purpose OBD2 scanner. Its unique ability to transform into a secondary display for real-time engine data within your car’s cabin adds to its versatility.
Its compact and lightweight design makes the BD310 exceptionally portable, easily fitting in a glovebox. While the 2-inch display is somewhat small and the four-key interface feels a bit basic, these aspects don’t hinder its diagnostic capabilities.
The 56-inch cable provides ample reach while working under the hood, and the BD310 effectively performs essential functions like I/M readiness tests and displays crucial performance metrics, including coolant temperature, engine timing, and speed.
Explore our full Ancel BD310 review.
5. Carly OBD-II Scanner: Detailed Review – Highest Rated OBD2 Scanner with Companion App
(Image credit: Carly)
Carly OBD-II Scanner Expert Review
A Solid Scanner, Maximized by Your Car’s Compatibility
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
- Extensive customization options
- Real-time live data display
- Maintenance and repair features
- Lifetime warranty and updates
Reasons to Avoid:
- Feature availability varies by car model
- App subscriptions can become expensive
The Carly OBD Scanner stands out for its feature-rich offering, particularly its exceptional companion app, making it a highest rated OBD2 scanner in terms of app integration. Unlike many Bluetooth scanners with basic apps, Carly provides one of the most sophisticated and user-friendly app experiences we’ve encountered.
Beyond basic diagnostics and clearing fault codes, the Carly app offers repair assistance, pre-purchase used car inspections, and a lifetime warranty, a rare and valuable perk.
However, feature availability is car-dependent, with VW, BMW, and Ford vehicles benefiting most comprehensively. Compatibility with your specific car model should be verified before purchase. Also, accessing advanced features beyond basic OBD functions requires an ongoing subscription, which can add to the overall cost.
Read our complete Carly OBD scanner review
Other Highly Rated OBD-II Scanners We’ve Tested
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Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a standout Bluetooth OBD-II scanner, incorporating Innova’s renowned features like predictive diagnostics in a wireless, phone-based format. Its remarkably simple setup process further enhances its appeal as a top Bluetooth-only option and highest rated OBD2 scanner.
Read the full Innova CarScan Mobile 1000 review
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ThinkCar ThinkDiag TKD01 (★★★★☆)
Despite its larger size compared to typical Bluetooth OBD-II adapters, the ThinkCar ThinkDiag TKD01 boasts exceptional durability. It offers a wide range of manufacturer-specific error codes and extended fault-code capabilities that can resolve minor issues without mechanic intervention. A subscription of $40 per year is required after the first year. Considered by many users as a highest rated OBD2 scanner for advanced features.
Read our full ThinkCar ThinkDiag TKD01 review.
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Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 OBD-II scanner excels in diagnosing electrical problems, thanks to its integrated multimeter. It can detect issues like burnt cables, electrical shorts, and blown fuses. It also provides extensive live data and pre-inspection readiness checks. A reliable and highest rated OBD2 scanner for electrical diagnostics.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions About Highest Rated OBD2 Scanners
What is an OBD-II Scanner?
Mechanics use diagnostic scanners plugged into your car’s OBD port to access your car’s onboard computer, not guesswork, to diagnose issues.
These scanners, at their most basic, read and identify error codes flagged by your car when it detects a problem. Advanced models monitor car systems in real-time and even predict potential future issues. Choosing a highest rated OBD2 scanner ensures accuracy and comprehensive diagnostics.
What is the OBD-II Port?
The On-Board Diagnostics Version Two (OBD-II) port is a standard port in almost all passenger vehicles sold in the US since 1996, Canada since 1998, EU since 2004, and Australia, Mexico, and New Zealand since 2006.
This port is the interface point to your car’s computer. Devices like OBD-II scanners, insurance black boxes, and dash cams can be plugged into it.
If unsure of your OBD-II port’s location, find guides for North American cars and worldwide OBD-II/EOBD ports. Using a highest rated OBD2 scanner with proper port connection is crucial for accurate readings.
What is a DTC?
DTC stands for Diagnostic Trouble Code, an error code generated by a car’s OBD system when it detects a problem. OBD-II scanners read these codes, enabling users to understand what’s happening within their vehicle. A highest rated OBD2 scanner will accurately interpret and display these codes.
Standardized DTC codes are consistent across vehicle makes and models, but some manufacturers use unique DTCs specific to their vehicles.
What Do DTCs Actually Mean?
DTCs may seem like random characters, but they follow a logical structure indicating the type and location of the issue. Understanding DTCs helps in vehicle diagnostics. A highest rated OBD2 scanner simplifies DTC interpretation.
The first letter indicates the affected system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character, a number, 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: Vehicle speed controls 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 pinpoint the exact fault, ranging from 0 to 99.
OBD-II scanners translate these codes into descriptions, with advanced models providing more detailed information. While online resources like Google can help, over 5,000 possible DTC errors exist. Not all DTCs signal critical problems; some may indicate minor issues like slightly elevated engine temperature. A highest rated OBD2 scanner provides clear and accurate DTC descriptions.
Choosing the Highest Rated OBD2 Scanner for Your Needs
For insights into your vehicle’s operation and potential issues, a highest rated OBD2 scanner is invaluable. It provides the same diagnostic capabilities used by dealerships and repair shops, empowering you with crucial information.
OBD-II scanners come in two main types:
- Handheld OBD-II scanners: Feature an integrated screen and cable for direct connection to the OBD port.
- Wireless OBD2 scanners: Connect to the OBD port and transmit data via Bluetooth to smartphones or tablets.
High-performance highest rated OBD2 scanners are available for under $200, with some under $30. Key criteria for selecting the best scanner include:
- Easy Setup: Quick and straightforward setup is essential for timely diagnostics.
- Faults and Explanations: Scanners should identify faults and provide clear explanations for effective troubleshooting.
- I/M Readiness Check: Verifies emissions system readiness for state inspections.
- Accuracy: Reliable and precise results are paramount for accurate diagnoses. Highest rated OBD2 scanners prioritize accuracy.
- Size and Weight: Portability ensures the scanner is readily available for on-the-go diagnostics.
- Live Data: Real-time monitoring of engine parameters aids in diagnosing intermittent issues.
- Graphs: Visual data representation enhances understanding and comparison.
- Warranty: Long-term warranty and software updates ensure lasting value. Highest rated OBD2 scanners often offer superior warranties.
Choosing between handheld and wireless scanners depends on preference. Consider longevity with lifetime warranties or software updates to keep pace with automotive technology. For handheld scanners, prioritize screen size and clarity. Rugged designs with shock absorption are beneficial for durability.
Additional features like electrical multimeters, manufacturer-specific code reading, and PDF export capabilities can be advantageous. The price point for sophisticated highest rated OBD2 scanners is reasonable, often under $100, making them a cost-effective alternative to professional mechanic diagnostics.
How We Test the Highest Rated OBD2 Scanners
To evaluate OBD2 scanners and determine the highest rated OBD2 scanners, we conduct thorough testing over several weeks using a 2014 Audi A4 Allroad in various driving conditions.
Testing involves:
- VIN Verification: Ensuring scanners accurately report the vehicle identification number (VIN).
- Connectivity Testing: For wireless scanners, testing Bluetooth or Wi-Fi connections with devices like Apple iPads, Microsoft Surfaces, and Samsung Galaxy phones. Handheld scanners are tested for direct OBD port functionality.
- Range and Cord Length: Measuring wireless range for Bluetooth scanners and cable length for handheld units.
- Live Data Monitoring: Monitoring engine and vital systems during car operation.
- Fault Code Generation and Reading: Simulating a fault by disconnecting the engine oil temperature sensor and assessing the scanner’s ability to identify and explain the error.
- Fault Code Clearing: Verifying the scanner’s ability to clear fault codes and turn off the check engine light after issue resolution.
- Road Testing: Evaluating the scanner’s performance in displaying real-time operating data like engine speed, timing, and coolant temperature during driving, noting data presentation (numbers, graphs, gauges).
Our testing rigorously assesses each scanner’s capabilities to identify the highest rated OBD2 scanners based on accuracy, features, ease of use, and reliability.
Understanding OBD-II fault codes is crucial. All codes consist of four numbers and a letter prefix:
- Powertrain (P)
- Body (B)
- Chassis (C)
- Undefined (U)
Of approximately 5,000 diagnostic fault codes, generic codes (starting with 0) apply to all cars (e.g., air temperature, throttle position). Manufacturer-specific codes (starting with 1) relate to unique hardware or in-depth problem analysis.
For example, P0098 indicates an intake air temperature sensor issue, while a Ford-specific P1112 code means intermittent intake air temperature sensor readings requiring replacement. Highest rated OBD2 scanners provide detailed interpretations of both generic and manufacturer-specific codes.
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