The best Bluetooth OBD2 scanners are essential tools for modern car owners, offering a window into your vehicle’s onboard computer to decipher everything from minor glitches to serious engine issues. That mysterious check engine light or a drop in performance? Your car’s computer likely knows the reason, and a Bluetooth OBD2 scanner is your key to unlocking that information without the need for expensive professional diagnostics.
However, navigating the world of OBD2 scanners can be overwhelming, especially for beginners. With countless options available, it’s crucial to choose a scanner that is both effective and user-friendly. Having tested numerous OBD2 scanners over the years, we’ve compiled a list of the top performers, highlighting their strengths and helping you make an informed decision. Below, we’ll also delve into how OBD2 scanners function and decode those cryptic error codes.
Among our top recommendations are the Topdon TopScan, a remarkably versatile wireless option perfect for in-depth diagnostics, and the budget-friendly Launch CR529, offering impressive features at an affordable price. For those seeking a professional-grade experience, the Topdon Phoenix Lite 2 delivers comprehensive diagnostic capabilities, though it comes with a higher price tag.
Here are our top picks for the best Bluetooth OBD2 scanners you can buy right now, designed to seamlessly connect to your smartphone or tablet and provide valuable insights into your vehicle’s health.
Alt text: Tom Pritchard, automotive expert and tech reviewer, author of the best Bluetooth OBD2 scanner guide.
Tom Pritchard
Tom is the UK Phones Editor at Tom’s Guide, with extensive experience covering mobile technology and a passion for electric vehicles. His expertise extends to automotive tech, ensuring reliable and insightful reviews.
Quick Recommendations: Top Bluetooth OBD2 Scanners
Based on our hands-on testing, here are the best Bluetooth OBD2 scanners available today. Continue scrolling for detailed reviews of each pick and a deeper understanding of their features.
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Topdon TopScan: Best Mobile Bluetooth Scanner
Effortless Bluetooth setup and professional-grade features packed into a compact design. Offers in-depth diagnostics, repair guidance, parts information, and predictive analysis for potential issues.
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Launch CR529: Best Value Bluetooth Compatible Scanner
Compact and powerful, the Launch CR529 delivers essential OBD2 scanner functions with added high-end features uncommon in its price range. Includes lifetime support and updates, offering exceptional value.
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Topdon Phoenix Lite 2: Best Professional-Grade Bluetooth Option
Robust and resembling a handheld gaming device, this professional-level scanner is built for both experts and DIY enthusiasts. Offers advanced diagnostics in a durable package.
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Ancel BD310: Best Dual-Function Bluetooth Scanner
Versatile OBD2 scanner that doubles as a supplementary dashboard display, providing real-time engine data in addition to diagnostic capabilities. Combines smartphone connectivity with a user-friendly design.
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best scanner with a companion app
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Carly OBD-II Scanner: Best Bluetooth Scanner with Companion App
Maximize functionality with the Carly scanner, particularly for VW, BMW, and Ford vehicles. Features an exceptional companion app with extensive customization and professional-level testing options.
Deep Dive: The Best Bluetooth OBD2 Scanners in Detail
Why Trust Tom’s Guide? Our product reviews are based on rigorous testing and analysis by experienced editors to help you choose the best products for your needs. Learn more about our testing process.
1. Topdon TopScan: Best Mobile Bluetooth OBD2 Scanner
Alt text: Topdon TopScan Bluetooth OBD2 scanner, compact wireless car diagnostic tool.
Alt text: Editor’s Choice badge, highlighting Topdon TopScan as a top pick.
(Image credit: Topdon)
Topdon TopScan Review
Perfect for comprehensive car diagnostics and performance analysis.
Read our expert review
Specifications:
- Display: None (App-based)
- Connectivity: Bluetooth
- Handheld: No
- I/M Readiness Test: Yes
- Live Data: Yes
- Keys: None (App-controlled)
- Warranty: 2 years
- Size: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Excellent diagnostic coverage
- Real-time live data display
- Unique performance indicators (horsepower, torque estimation)
- Comprehensive maintenance features
Reasons to Avoid:
- Larger transmitter unit
- Advanced features may require subscription after the first year
The Topdon TopScan may appear unassuming, but this compact Bluetooth OBD2 scanner is packed with features that surpass many competitors. More than just a basic Bluetooth OBD-II module, it offers advanced capabilities for performance and efficiency analysis, including estimations of horsepower and torque – features often found in scanners costing ten times more. Ideal for both fine-tuning your vehicle and ensuring roadworthiness, the Topdon TopScan is a valuable addition to any car owner’s toolkit seeking a wireless Bluetooth OBD2 solution.
Read our full Topdon TopScan review
2. Launch CR529: Best Budget Bluetooth Compatible OBD2 Scanner
Alt text: Launch CR529 OBD-II scanner, affordable car diagnostic tool for home mechanics.
Alt text: Editor’s Choice badge, recognizing Launch CR529’s value and performance.
(Image credit: Future)
Launch CR529 Review
Unbeatable OBD2 scanner performance for under $50.
Read our expert review
Specifications:
- Display: Color, 2.8-inch
- Bluetooth: No (Cable connection)
- Handheld: Yes
- I/M Readiness Test: Yes
- Live Data: Yes
- 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
- Easy pre-inspection reporting
Reasons to Avoid:
- Lacks manufacturer-specific codes
- Feels somewhat heavy
- 1-year warranty
The Launch CR529 stands out as an exceptional value Bluetooth compatible OBD2 scanner. Its remarkably low price doesn’t compromise its diagnostic capabilities, offering a surprising level of features for the cost. While it omits manufacturer-specific codes and has a slightly heavier feel, it delivers live data, instant inspections, and comprehensive car insights. Lifetime updates ensure long-term usability without subscription fees, making the CR529 an excellent choice for budget-conscious users seeking reliable OBD2 functionality, even if it’s not directly Bluetooth connected, it represents incredible value in the market and can be considered alongside Bluetooth options for its overall capabilities.
Read our full Launch CR529 review
3. Topdon Phoenix Lite 2: Best Professional Bluetooth OBD2 Scanner
Alt text: Topdon Phoenix Lite 2 professional OBD2 scanner, advanced wireless car diagnostics.
Alt text: Tom Pritchard, product reviewer, highlighting Topdon Phoenix Lite 2’s professional quality.
(Image credit: Future)
Topdon Phoenix Lite 2 Review
Bridging the gap between DIY and professional-level diagnostics.
Read our expert review
Specifications:
- Display: Color, 8-inch Touchscreen
- Bluetooth: Yes
- Handheld: Yes
- I/M Readiness Test: Yes
- Live Data: Yes
- Keys: Touchscreen
- Warranty: 2 years
- Size: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Reasons to Buy:
- Near-professional OBD scanner capabilities
- Hybrid handheld with Wi-Fi and Bluetooth
- Large 8-inch touchscreen
- Excellent diagnostic tests and live data features
- Includes adapters and hard case
Reasons to Avoid:
- Bulky and heavy
- High price point
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 is a premium Bluetooth OBD2 scanner that delivers exceptional performance for both amateur and professional mechanics. While pricier than other options, it justifies the investment with a wealth of features, including wireless operation via Bluetooth, a large 8-inch touchscreen, and an extensive suite of diagnostic functions rivaling professional-grade tools. Its wireless control pad offers freedom of movement, and the rugged design ensures durability. Advanced features like live data graphing and detailed fault information are included. Consider this powerful and versatile scanner if you need comprehensive Bluetooth OBD2 diagnostics and are prepared for the investment.
Read our full Topdon Phoenix Lite 2 review
4. Ancel BD310: Best Dual-Purpose Bluetooth OBD2 Scanner
Alt text: Ancel BD310 OBD2 scanner, compact and versatile car diagnostic and display tool.
Ancel BD310 (Image credit: Tom’s Guide)
Ancel BD310 Review
A convenient OBD2 scanner that serves a dual purpose.
Read our expert review
Specifications:
- Display: Color, 2 inches
- Bluetooth: Yes
- Handheld: Yes
- I/M Readiness Test: Yes
- Live Data: Yes
- 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
- Functions as both scanner and secondary car display
- Handheld and Bluetooth scanning
Reasons to Avoid:
- Minimalist interface
- Small screen size
The Ancel BD310 is a unique dual-purpose Bluetooth OBD2 scanner that functions as both a standard handheld diagnostic tool and a supplementary display for your car’s dashboard. Connecting via Bluetooth to your smartphone, it can display crucial engine data in real-time. Its compact size makes it easily storable in a glovebox, while still providing essential functions like I/M readiness tests and performance data. Although the 2-inch screen and minimalist interface are limitations, its portability and dual functionality make the Ancel BD310 a practical choice for everyday use and quick diagnostics.
Read our full Ancel BD310 review.
5. Carly OBD-II Scanner: Best Bluetooth OBD2 Scanner with Companion App
Alt text: Carly OBD2 scanner, wireless car diagnostic tool with advanced mobile app.
(Image credit: Carly)
Carly OBD-II Scanner Review
A dependable scanner, enhanced by its car-specific compatibility.
Read our expert review
Specifications:
- Display: None (App-based)
- Bluetooth: Yes
- Handheld: No
- I/M Readiness Test: No
- Live Data: Yes
- Keys: None (App-controlled)
- Warranty: Lifetime
- Size: 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
- Maintenance and repair assistance
- Lifetime warranty and updates
Reasons to Avoid:
- Feature availability varies by car model
- App subscription can be costly for full features
The Carly OBD Scanner distinguishes itself with an exceptionally well-designed companion app, setting it apart from other Bluetooth scanners. While some Bluetooth OBD2 scanners offer basic apps, Carly provides one of the most comprehensive and user-friendly experiences available. Beyond basic diagnostics, it offers repair assistance, used car checks, and a lifetime warranty. However, feature availability is car-dependent, with optimal performance for VW, BMW, and Ford models. A subscription is also required to unlock the full potential beyond basic OBD functions, which can add to the overall cost. For users with compatible vehicles seeking a feature-rich Bluetooth OBD2 experience centered around a powerful app, Carly is a strong contender.
Read our full Carly OBD scanner review
Other Bluetooth OBD2 Scanners We’ve Tested
- Innova CarScan Mobile 1000 (★★★★☆): An innovative Bluetooth OBD2 scanner with predictive diagnostics and simple setup. Read the full Innova CarScan Mobile 1000 review
- ThinkCar ThinkDiag TKD01 (★★★★☆): A robust Bluetooth OBD2 scanner with extensive manufacturer-specific codes and fault-code repair capabilities. Subscription required after the first year. Read our full ThinkCar ThinkDiag TKD01 review.
- Autel AutoLink AL539 (★★★☆☆): Designed for electrical diagnostics, this OBD2 scanner includes a multimeter and comprehensive live data. Read our full Autel AutoLink AL539 review
Frequently Asked Questions About Bluetooth OBD2 Scanners
What is an OBD-II Scanner?
OBD-II scanners are diagnostic tools that mechanics and car owners use to access information from a vehicle’s onboard computer system via the OBD port. Instead of manually inspecting every component, scanners quickly identify issues by reading error codes and monitoring real-time data. Basic scanners read and interpret error codes, while advanced Bluetooth models can monitor systems in real-time and even predict potential problems.
What is the OBD-II Port?
The On-Board Diagnostics Version Two (OBD-II) port is a standardized interface found in most passenger vehicles sold in the US since 1996, Canada since 1998, EU since 2004, and other regions including Australia and New Zealand. It allows various devices, including OBD-II scanners, insurance trackers, and dash cams, to interface with the car’s computer. For port location guides, see: North American OBD-II port locations and worldwide OBD-II/EOBD port locations.
What is a DTC (Diagnostic Trouble Code)?
DTC stands for Diagnostic Trouble Code, an error code generated by a car’s OBD system when it detects a problem. Bluetooth OBD2 scanners read these codes to help users diagnose vehicle issues. Standardized DTC codes are consistent across manufacturers, but some manufacturers also use unique, vehicle-specific DTCs.
Understanding DTC Meanings:
DTCs may appear complex but follow a logical structure. The first character indicates 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:
- 1: Fuel and air metering
- 2: Injector circuit fuel and air metering
- 3: Ignition system or misfire
- 4: Auxiliary emissions
- 5: Vehicle speed and idle control
- 6: Computer auxiliary outputs
- 7, 8, 9: Transmission/gearbox faults
- A, B, C: Hybrid propulsion faults
The fourth and fifth characters detail the specific fault, ranging from 0 to 99. Bluetooth OBD2 scanners translate these codes into understandable descriptions, with advanced models offering more detailed information. While there are thousands of DTCs, not all indicate critical problems; some may simply be warnings about minor issues like engine temperature fluctuations.
Choosing the Right Bluetooth OBD2 Scanner
For understanding your vehicle’s condition or diagnosing problems, Bluetooth OBD2 scanners are invaluable. They provide access to the same diagnostic information used by dealerships and repair shops, empowering car owners with knowledge. There are two main types:
- Handheld OBD-II scanners: Feature an integrated screen and cable.
- Wireless Bluetooth OBD2 scanners: Connect to smartphones or tablets via Bluetooth.
Both types offer high-performance options under $200, with some under $30. Key considerations when choosing a Bluetooth OBD2 scanner include:
- Easy Setup: Quick and straightforward setup is essential for frequent use.
- Faults and Explanations: Clear fault code descriptions and explanations are crucial for diagnosis.
- I/M Readiness Check: Ensures your vehicle will pass emissions inspections.
- Accuracy: Reliable and accurate readings are paramount.
- Size and Weight: Portability for on-the-go diagnostics.
- Live Data: Real-time monitoring of engine parameters for tracking intermittent issues.
- Graphs: Visual data representation for easier analysis.
- Warranty: Long-term warranty for peace of mind.
When selecting a Bluetooth OBD2 scanner, prioritize features that meet your diagnostic needs and consider factors like ease of use, accuracy, and warranty. Extras like manufacturer-specific code reading, multimeter functionality, or PDF export capabilities can further enhance utility. With prices comparable to an hour of mechanic labor, investing in a Bluetooth OBD2 scanner is a cost-effective way to maintain your vehicle.
Our Bluetooth OBD2 Scanner Testing Methodology
To evaluate Bluetooth OBD2 scanners, we conducted hands-on testing using a 2014 Audi A4 Allroad over several weeks in various driving conditions. Each scanner was connected to the vehicle’s OBD-II port, verifying VIN reporting. Wireless scanners were paired with Apple iPads, Microsoft Surfaces, and Samsung Galaxy smartphones via Bluetooth.
Cord length was measured for handheld scanners, and Bluetooth range was assessed for wireless models. Engine data and vital systems were monitored during operation, and diagnostic capabilities were tested by simulating a fault condition (disconnecting the oil temperature sensor).
Scanner details and fault code interpretations were evaluated, followed by clearing the fault and engine light. Road tests were conducted to assess live data display, including engine speed, timing, and coolant temperature, noting data presentation in numerical, graphical, or gauge formats.
Fault code interpretation was reviewed, understanding the structure of codes with a letter prefix (P, B, C, U) and numerical components indicating generic (0) or manufacturer-specific (1) issues. For example, a P0098 code typically indicates an intake air temperature sensor problem, while a Ford-specific P1112 code points to intermittent intake air temperature sensor readings requiring replacement.
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By equipping yourself with the best Bluetooth OBD2 scanner, you gain valuable insight into your vehicle’s health, enabling proactive maintenance and informed repair decisions.
