The best OBD2 Bluetooth scanners are your gateway to understanding your car’s inner workings. By wirelessly connecting to your vehicle’s onboard computer, these scanners provide access to a wealth of information, from diagnosing pesky dashboard lights to monitoring real-time performance data. Instead of relying solely on expensive mechanics, a Bluetooth OBD2 scanner empowers you to take control of your car’s health.
However, the market is flooded with options, and choosing the right Bluetooth OBD2 scanner can be daunting. Having rigorously tested numerous OBD2 scanners over the years, we’ve pinpointed the top performers that are actually worth your investment. Keep reading to discover our expert recommendations and a comprehensive guide on how OBD2 scanners function and deciphering those cryptic error codes.
Among our top picks, the Topdon TopScan stands out as the best mobile Bluetooth OBD2 scanner, offering exceptional wireless functionality and comprehensive diagnostic capabilities. For budget-conscious users, the Launch CR529 delivers impressive features at an affordable price. And for those seeking professional-grade diagnostics, the Topdon Phoenix Lite 2 provides an advanced experience, albeit at a premium cost.
Here are our curated selections for the best OBD2 Bluetooth scanners available today.
Tom Pritchard
Tom is the UK Phones Editor for Tom’s Guide, specializing in mobile technology and automotive tech. He is passionate about electric vehicles and advocates for their adoption.
Top OBD2 Bluetooth Scanners at a Glance
Based on our hands-on evaluations, these are the best OBD2 Bluetooth scanners you can purchase right now. Continue scrolling for detailed reviews and insights into each scanner’s strengths.
The Topdon TopScan is the easiest Bluetooth OBD2 scanner to set up and use, according to our tests. Despite its compact size, it packs professional-grade features, including in-depth diagnostics, repair guidance, parts information, and predictive analysis for potential issues.
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The Launch CR529 is a small yet powerful handheld OBD2 scanner that provides essential diagnostic functions and some advanced features typically found in higher-priced models. It also includes lifetime software support and updates, making it an exceptional value.
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The Topdon Phoenix Lite 2, with its robust, tablet-style design, resembles a Nintendo Switch for your car’s computer. Designed for both professionals and DIYers, this powerful scanner is built to withstand demanding environments.
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The Ancel BD310 serves as both a capable OBD2 scanner and an auxiliary dashboard display for your car’s engine metrics. It combines a user-friendly design, smartphone compatibility, and a competitive price.
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The Carly OBD-II Scanner’s utility is highly dependent on your car’s make, with optimal performance for VW, BMW, and Ford vehicles. Its standout feature is its exceptional companion app, offering extensive customization and professional-level diagnostic capabilities.
Exploring the Best OBD2 Bluetooth Scanners
Why Trust Tom’s Guide? Our team of experts rigorously tests and reviews products to provide you with unbiased and reliable recommendations. Learn more about our testing methodology.
Best Mobile OBD2 Bluetooth Scanner
(Image credit: Topdon)
1. Topdon TopScan
Ideal for Deep Vehicle Diagnostics and Performance Analysis
Read our detailed review:
Specifications:
- Display/size: None (App-based)
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: Yes
- Live Data Display: Yes
- Number of Buttons: None (App-controlled)
- 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 Avoid:
- Bulky adapter
- Subscription required for full features after one year
The Topdon TopScan redefines compact power in Bluetooth OBD2 scanners. Don’t be deceived by its unassuming appearance; this scanner is packed with features that surpass many competitors in its category. It’s more than just a basic Bluetooth OBD2 module; it’s a sophisticated tool that transmits rich data to a user-friendly mobile app on your smartphone. We were impressed by its ability to go beyond basic fault code reading and I/M Readiness tests. The TopScan excels in performance and efficiency analysis, even estimating horsepower and torque – capabilities rarely found in scanners at this price point.
Many OBD2 scanners costing significantly more lack the performance analysis features of the TopScan. Whether you’re aiming to optimize your car’s performance or ensure its roadworthiness, this Bluetooth OBD2 scanner is an invaluable addition to your toolkit.
Read our full Topdon TopScan review
Best Budget OBD2 Scanner
(Image credit: Future)
2. Launch CR529
Top Value OBD2 Scanner Under $50
Read our expert review:
Specifications:
- Display/size: Color/ 2.8-inches
- Bluetooth/Handheld: No/Yes
- I/M Readiness test: Yes
- Live Data Display: Yes
- Number of Buttons: 8
- Warranty: 1 year
- Size: 6.5 x 3.8 x 1.2 inches
- Weight: 11 ounces
Reasons to Buy:
- Highly affordable
- Lifetime software updates
- Easy pre-inspection reporting
Reasons to Avoid:
- Limited manufacturer-specific codes
- Feels heavy
- Short 1-year warranty
The Launch CR529 is arguably the best value OBD2 scanner on the market. Its affordability, priced under $50, is matched by a surprising array of diagnostic features. We were impressed by the level of functionality offered at such a low price. While it’s not a Bluetooth OBD2 scanner, its handheld functionality is robust and user-friendly for quick diagnostics.
Some compromises are expected at this price point. The CR529 lacks manufacturer-specific codes and has a somewhat heavy feel. However, it still provides live data, instant vehicle inspection reports, and detailed insights into your car’s systems. Lifetime updates ensure long-term usability without subscription fees.
The CR529 may not satisfy professional mechanics seeking advanced features. However, for the average car owner, it’s an excellent, budget-friendly tool to keep in your garage.
Read our full Launch CR529 review
Best Professional-Grade OBD2 Scanner
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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
Read our expert review:
Specifications:
- Display/size: Color/8-inch Touchscreen
- Bluetooth/Handheld: Yes/Yes (Wireless via Bluetooth)
- I/M Readiness test: Yes
- Live Data Display: Yes
- Number of Buttons: Touchscreen
- Warranty: 2 years
- Size: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Reasons to Buy:
- Professional-grade OBD2 scanner capabilities
- Hybrid handheld with Bluetooth and Wi-Fi connectivity
- Large 8-inch touchscreen display
- Extensive range of diagnostic tests and live data options
- Includes adapters and a protective hard case
Reasons to Avoid:
- Large, heavy, and sometimes cumbersome
- Expensive
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 is a significant investment, costing more than many other OBD2 scanners, but it delivers exceptional value for the price. It’s designed to meet the needs of both experienced mechanics and serious DIY enthusiasts. While it’s not solely a Bluetooth OBD2 scanner, its wireless capabilities are central to its appeal.
A key feature of the Phoenix Lite 2 is its complete wireless operation. The tablet control unit connects via Bluetooth to a receiver plugged into your car’s OBD port, providing unparalleled freedom of movement around the vehicle. The scanner itself is robustly built for workshop environments, featuring a kickstand and rugged design.
It offers advanced features like live data graphing, detailed fault code information, and capabilities exceeding those of basic scanners. Be aware of the post-warranty subscription fee of $495 per year for continued firmware updates after the initial two years.
Read our full Topdon Phoenix 2 Lite review
Best Dual-Purpose OBD2 Scanner
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
A Versatile OBD2 Scanner with Secondary Display Functionality
Read our expert review:
Specifications:
- Display/size: Color/2 inches
- Bluetooth/Handheld: Yes/Yes
- I/M Readiness test: Yes
- Live Data Display: Yes
- Number of Buttons: 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 a scanner and a secondary car display
- Offers both handheld and Bluetooth scanning options
Reasons to Avoid:
- Minimalist interface
- Small screen
The Ancel BD310 is a dual-function OBD2 scanner that operates as a standard handheld device and connects to smartphones via Bluetooth. Its unique selling point is its ability to transform into a secondary display, showing essential engine data directly in your car’s cabin. This Bluetooth OBD2 scanner offers versatility in usage.
The BD310’s compact and lightweight design makes it easily portable and storable in a glovebox. The 2-inch screen is small, and the four-button interface is somewhat basic, but it remains effective for car diagnostics.
Its 56-inch cable provides ample reach when working under the hood. The BD310 performs essential functions like I/M readiness tests and displays performance data, including coolant temperature, engine timing, and RPM.
Read our full Ancel BD310 review.
Best OBD2 Scanner with Companion App
(Image credit: Carly)
5. Carly OBD-II Scanner
Performance Varies by Car Model, Excellent App Experience
Read our expert review:
Specifications:
- Display/Size: None (App-based)
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: No
- Live Data Display: Yes
- Number of Buttons: 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 guidance
- Lifetime warranty and updates
Reasons to Avoid:
- Feature availability varies by car model
- App subscription can be costly
The Carly OBD Scanner delivers a wide range of features, with its companion app being a standout element. Unlike many basic Bluetooth OBD2 scanners with rudimentary apps, Carly offers one of the most sophisticated and user-friendly app experiences available. This is a dedicated Bluetooth OBD2 scanner, designed for seamless app integration.
The app not only diagnoses issues and clears fault codes but also provides repair assistance and tools to evaluate used cars for potential problems. A lifetime warranty adds significant value.
However, feature availability is car-dependent, with optimal functionality for VW, BMW, and Ford models. Compatibility with your specific vehicle should be verified before purchase. Access to advanced features beyond basic OBD functions requires an ongoing subscription, which can become expensive over time.
Read our full Carly OBD scanner review
Other OBD2 Scanners We’ve Evaluated
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Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a highly innovative Bluetooth OBD2 scanner, incorporating Innova’s renowned predictive diagnostics features in a wireless, app-driven format. Its exceptionally easy setup process makes it a compelling Bluetooth-only option.
Read the full Innova CarScan Mobile 1000 review
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ThinkCar ThinkDiag TKD01 (★★★★☆)
Despite being larger than typical Bluetooth OBD2 adapters, the ThinkDiag TKD01 boasts exceptional durability. It offers a wide array of manufacturer-specific and extended fault codes, capable of resolving minor issues without mechanic intervention. A subscription of $40 per year is required after the first year.
Read our full ThinkCar ThinkDiag TKD01 review.
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Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 OBD2 scanner is engineered for electrical diagnostics, featuring a built-in multimeter to identify issues like damaged wiring, short circuits, and blown fuses. It also provides extensive live data and pre-inspection readiness checks. While not a Bluetooth OBD2 scanner, it’s a valuable tool for electrical troubleshooting.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions about OBD2 Bluetooth Scanners
What is an OBD2 Scanner?
Mechanics use diagnostic scanners connected to your car’s OBD port to identify vehicle problems, rather than manually disassembling and inspecting components. These OBD2 scanners access data from your car’s onboard computer to pinpoint issues.
Basic OBD2 scanners read and interpret error codes flagged by your car’s computer when a problem is detected. Advanced models offer real-time system monitoring and can even predict potential future issues. Bluetooth OBD2 scanners enhance convenience by wirelessly transmitting data to your smartphone or tablet.
What is the OBD2 Port?
The On-Board Diagnostics Version Two (OBD2) port is a standardized port found in almost 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 point to your car’s onboard computer. Various devices, including OBD2 scanners, insurance telematics devices, and dashcams, can connect to the OBD2 port. Bluetooth OBD2 scanners plug into this port for wireless communication.
If you need help locating the OBD2 port, here’s a guide on finding your car’s OBD2 port for North American vehicles. For worldwide locations, consult this guide on finding your OBD2/EOBD port globally.
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. OBD2 scanners read these DTCs, enabling users to diagnose vehicle problems. Standardized DTC codes are consistent across vehicle makes and models, although some manufacturers use proprietary DTCs specific to their vehicles.
Understanding DTC Meanings
DTCs may appear as random combinations of letters and numbers. However, they follow a logical structure to indicate the nature of the detected error.
The first letter signifies the affected vehicle system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character, a number, indicates whether the code is generic (0) or manufacturer-specific (1).
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 propulsion system faults
The fourth and fifth characters pinpoint the exact fault within the subsystem, ranging from 0 to 99.
OBD2 scanners provide descriptions of these error codes. Advanced models offer more detailed information. Online resources like Google can also help decipher DTCs. Over 5,000 different DTCs exist.
Not all DTCs indicate critical issues. While they signal problems, some codes may simply warn of minor issues like slightly elevated engine temperature.
Choosing the Best OBD2 Bluetooth Scanner for Your Needs
Using an OBD2 scanner is the most effective way to gain insights into your vehicle’s operation and diagnose potential problems.
This is the same method used by dealerships and repair shops. Having this capability empowers you with the same diagnostic information. OBD2 scanners come in two primary types:
Handheld OBD2 scanners feature an integrated screen and a cable for connecting to the OBD port. Wireless OBD2 scanners, particularly Bluetooth OBD2 scanners, plug into the OBD port and wirelessly transmit data to a smartphone or tablet.
High-performance OBD2 scanners are available for under $200, with some budget options priced below $30. Key considerations for selecting the best OBD2 Bluetooth scanner include:
- Easy Setup: Quick and straightforward setup is crucial for timely diagnostics. Bluetooth OBD2 scanners excel in ease of setup due to wireless pairing.
- Fault Code Explanation: The best scanners not only display fault codes but also provide clear explanations, aiding DIY repairs or informed communication with mechanics.
- I/M Readiness Check: A valuable feature for pre-emission testing, ensuring your vehicle will pass inspections.
- Accuracy: Reliable and accurate diagnostic results are paramount.
- Size and Weight: Compact and lightweight scanners, especially Bluetooth OBD2 adapters, are more convenient for storage and on-the-go use.
- Live Data: Real-time data monitoring is essential for tracking down intermittent issues. Bluetooth OBD2 scanners seamlessly stream live data to your mobile device.
- Graphs: Visual data representation through graphs enhances data interpretation.
- Warranty: Opt for scanners with extended warranties, ideally lifetime, for long-term reliability.
Choosing between handheld and Bluetooth OBD2 scanners depends on your preferences. Bluetooth OBD2 scanners offer wireless convenience and app-based interfaces, while handheld scanners provide standalone operation.
Consider longevity and choose a scanner with software updates or a lifetime warranty to ensure compatibility with evolving automotive technology.
For handheld scanners, prioritize screen size and clarity. Rugged models with shock-absorbing bumpers are recommended for durability.
Additional features to consider include electrical multimeter functionality, manufacturer-specific code reading, and PDF report export.
The affordability of sophisticated OBD2 scanners, often under $100, makes them a cost-effective alternative to professional mechanic diagnostics, potentially saving you significant repair costs. Bluetooth OBD2 scanners further enhance this value with their user-friendly wireless operation.
Our OBD2 Scanner Testing Methodology
To evaluate OBD2 scanners, including Bluetooth OBD2 models, we used a 2014 Audi A4 Allroad over several weeks in both garage and on-road conditions. Each scanner was connected to the vehicle’s OBD2 port to verify VIN reporting accuracy.
For wireless scanners, we established Bluetooth or Wi-Fi connections with Apple iPads, Microsoft Surface tablets, and Samsung Galaxy S9+ phones. Handheld scanners were powered directly through the OBD2 port.
Cord lengths (for handheld scanners) and wireless ranges were assessed. With the engine running, we monitored engine and system parameters and simulated a fault by disconnecting the oil temperature sensor.
Scanner performance was evaluated based on fault code details, troubleshooting assistance, check engine light clearing, and error code erasure.
On-road testing involved monitoring real-time operating data like engine speed, timing, and coolant temperature, noting data display formats (numerical, graphs, gauges).
Understanding OBD2 fault codes is crucial. All codes consist of a letter prefix and four numbers:
- Powertrain (P)
- Body (B)
- Chassis (C)
- Undefined (U)
Of approximately 5,000 diagnostic fault codes, generic codes (starting with 0) apply universally across vehicles (e.g., air temperature, throttle position). Manufacturer-specific codes (starting with 1) are unique to carmakers and represent specialized hardware or deeper issue analysis.
For example, a P0098 code typically indicates an issue with the intake air temperature sensor. A Ford-specific P1112 code points to intermittent intake air temperature sensor readings requiring sensor replacement. Bluetooth OBD2 scanners simplify accessing and interpreting these codes wirelessly on your mobile device.
