Unlocking your car’s hidden data is easier than ever with the best OBD2 scanners. These ingenious devices act as a bridge to your vehicle’s onboard computer, giving you a peek into the wealth of information it holds. Whether you’re facing a mysterious dashboard light or suspect an underlying issue, an OBD2 scanner can empower you to diagnose problems yourself, saving you time and money on professional mechanic fees.
Navigating the world of OBD2 scanners can be daunting, especially for beginners. The market is flooded with options, each promising to be the best. Having rigorously tested numerous OBD2 scanners over the years, we’ve compiled a list of the top performers that are genuinely worth your investment in 2023. Keep reading to discover our top recommendations and gain a deeper understanding of how OBD2 scanners function and decipher those cryptic error codes.
Among our top picks, the Topdon TopScan stands out as a remarkably versatile wireless scanner, offering impressive diagnostic capabilities in a compact form. For budget-conscious users, the Launch CR529 delivers exceptional value at an affordable price point. However, for those seeking professional-grade diagnostics, the Topdon Phoenix Lite 2 provides an experience akin to what you’d find in a professional workshop, albeit at a premium price.
Here are our expertly selected top picks for the best OBD2 scanners in 2023, designed to help you make an informed decision.
Tom Pritchard
Tom Pritchard is a seasoned tech expert at Tom’s Guide UK, specializing in mobile technology and emerging gadgets. An avid advocate for electric vehicles, Tom brings a wealth of knowledge and hands-on experience to his automotive technology reviews.
The Top OBD2 Scanners in a Glance
Based on our rigorous hands-on testing, here’s a quick overview of the best OBD2 scanners you can buy right now. Scroll down to explore detailed reviews of each scanner and understand why they earned a spot on our top list.
Best Mobile Scanner1. Topdon TopScan
The Topdon TopScan distinguishes itself as the easiest Bluetooth scanner to set up, according to our tests. Despite its compact design, it packs a punch with professional-grade features. Expect comprehensive diagnostics, repair guidance, parts lists, and even predictive analysis to anticipate potential issues before they escalate.
Dive Deeper into Topdon TopScan
Best Cheap Scanner2. Launch CR529
Don’t let the size fool you; the Launch CR529 is a small yet powerful OBD2 scanner that delivers all the essential features you need, along with some high-end capabilities typically found in more expensive models. Benefit from lifetime support and updates, making this scanner an unbeatable value proposition.
Explore the Value of Launch CR529
Best Rugged Scanner3. Topdon Phoenix Lite 2
Resembling a robust Nintendo Switch for your car’s computer, the Topdon Phoenix Lite 2 boasts a rugged horizontal case built to withstand demanding environments. Designed for both professionals and car enthusiasts, this powerful scanner offers advanced diagnostics in a durable package.
Discover the Power of Topdon Phoenix Lite 2
Best Dual-Purpose Scanner4. Ancel BD310
The Ancel BD310 is not just an effective OBD2 scanner; it also enhances your car’s dashboard by displaying a range of real-time engine specifications. Enjoy a sleek and user-friendly design, smartphone compatibility, and exceptional value for money in this dual-purpose device.
Learn More About Ancel BD310’s Dual Functionality
Best Scanner with a Companion App5. Carly OBD-II Scanner
The Carly OBD Scanner’s utility is heavily dependent on your car make, with VW, BMW, and Ford vehicles benefiting most from its core features. However, Carly truly shines with its exceptional companion app, offering a wide array of customization options and professional-level diagnostic tests.
Explore Carly OBD-II Scanner’s App Integration
What Makes These OBD2 Scanners the Best?
Why Trust Our Recommendations? At Tom’s Guide, our commitment is to deliver unbiased and thorough reviews. Our team of experts invests countless hours in hands-on testing and analysis of products and services to guide you towards the best choices. Learn more about our rigorous testing methodology and rating process.
Best Mobile OBD2 Scanner: Topdon TopScan
(Image credit: Topdon)
1. Topdon TopScan
The Topdon TopScan: Your Pocket-Sized Powerhouse for Comprehensive Car Diagnostics
Read our in-depth expert review of the Topdon TopScan
Key Specifications:
| Feature | Specification |
|---|---|
| Display/Size | None |
| Bluetooth/Handheld | Yes/No |
| I/M Readiness Test | Yes |
| Live Data Display | Yes |
| Number of Keys | None |
| Warranty | 2 years |
| Size | 3.2 x 2.0 x 1.1 inches |
| Weight | 2.6 ounces |
Reasons to Choose Topdon TopScan:
- Extensive Automotive Diagnostic Coverage: Delves deep into your car’s systems for thorough analysis.
- Real-time Live Data: Monitors crucial parameters for pinpointing intermittent issues.
- Unique Performance Indicators: Assesses horsepower and torque, offering insights beyond basic diagnostics.
- Maintenance Item Coverage: Extends beyond error codes to include routine maintenance needs.
Considerations Before Choosing Topdon TopScan:
- Bulky Transmitter: The Bluetooth transmitter might feel a bit large and heavy for some users.
- Subscription for Advanced Features: Some advanced functionalities require a subscription after the first year of use.
The Topdon TopScan might appear unassuming at first glance, but this compact scanner is packed with features that go far beyond expectations. It’s more than just a standard Bluetooth OBD2 module; it’s a sophisticated tool that rivals scanners in higher price brackets.
Beyond basic fault detection and I/M Readiness tests, the TopScan excels in performance and efficiency analysis. It can even estimate your car’s horsepower and torque figures, capabilities rarely found in scanners at this price point.
Whether you’re a performance enthusiast seeking to optimize your car’s output or simply a responsible owner aiming for reliable vehicle maintenance, the Topdon TopScan is an invaluable addition to your toolkit.
Read our comprehensive Topdon TopScan review for a deeper dive.
Best Budget OBD2 Scanner: Launch CR529
(Image credit: Future)
2. Launch CR529
Launch CR529: Unbeatable Value in an OBD2 Scanner Under $50
Explore our expert review of the Launch CR529
Key Specifications:
| Feature | Specification |
|---|---|
| Display/Size | Color/ 2.8-inches |
| Bluetooth/Handheld | No/Yes |
| I/M Readiness Test | Yes |
| Live Data Display | Yes |
| Number of Keys | 8 |
| Warranty | 1 year |
| Size | 6.5 x 3.8 x 1.2 inches |
| Weight | 11 ounces |
Reasons to Choose Launch CR529:
- Exceptional Affordability: Priced under $50, offering incredible value for money.
- Lifetime Free Updates: Ensures your scanner stays current with the latest vehicle technology.
- Easy Pre-Inspection Reports: Simplifies emissions testing preparation.
Considerations Before Choosing Launch CR529:
- Limited Manufacturer-Specific Codes: Lacks access to specialized codes from car manufacturers.
- Heavier Build: May feel somewhat weighty in hand compared to lighter scanners.
- 1-Year Warranty: Shorter warranty period compared to some competitors.
The Launch CR529 redefines “value” in the OBD2 scanner market. Priced remarkably low, it delivers a surprising array of diagnostic features that belie its affordability. We were genuinely impressed by the level of functionality packed into this budget-friendly scanner.
While compromises are inevitable at this price point, such as the absence of manufacturer-specific codes and a slightly heavier feel, the CR529 still provides essential features like live data, instant inspection readiness checks, and detailed insights into your car’s internal systems. The inclusion of lifetime updates is a significant bonus, ensuring long-term usability without recurring subscription fees.
The CR529 might not cater to professional mechanics seeking advanced features, but for everyday car owners and DIY enthusiasts, it’s an outstanding choice that offers exceptional bang for your buck.
Delve into our full Launch CR529 review to see why it’s a top budget pick.
Best Pro-Level OBD2 Scanner: Topdon Phoenix Lite 2
[
(Image credit: Future)
3. Topdon Phoenix Lite 2
Topdon Phoenix Lite 2: Bridging the Gap Between Enthusiast and Professional Diagnostics
Read our comprehensive expert review of the Topdon Phoenix Lite 2
Key Specifications:
| Feature | Specification |
|---|---|
| Display/Size | Color/8-inch |
| Bluetooth/Handheld | Yes/Yes |
| I/M Readiness Test | Yes |
| Live Data Display | Yes |
| Number of Keys | Touchscreen |
| Warranty | 2 years |
| Size | 10.2 x 7.2 x 1.7 inches |
| Weight | 2.6 pounds |
Reasons to Choose Topdon Phoenix Lite 2:
- Near-Professional OBD Scanning: Offers features and capabilities approaching professional-grade scanners.
- Versatile Wireless Connectivity: Combines handheld operation with Wi-Fi and Bluetooth for flexible use.
- Large 8-inch Touchscreen: Provides a spacious and intuitive interface for easy navigation.
- Extensive Diagnostic Tests and Live Data: Offers a wide array of advanced diagnostic functions and real-time data monitoring.
- Comprehensive Package: Includes adapters and a hard case for added value and protection.
Considerations Before Choosing Topdon Phoenix Lite 2:
- Bulky and Heavy: The scanner’s size and weight might make it less portable for some users.
- Higher Price Point: Significantly more expensive than many other capable OBD2 scanners.
- Subscription for Updates After 2 Years: Firmware updates require a paid subscription after the initial 2-year period.
The Topdon Phoenix Lite 2 represents a significant investment, positioned above many other competent OBD2 scanners. However, this higher price tag unlocks a wealth of features and capabilities that justify the cost for serious DIYers and professional mechanics alike.
A standout feature is its completely wireless operation. The control pad communicates with a Bluetooth receiver plugged into your car’s OBD port, granting unparalleled freedom of movement around the vehicle during diagnostics. While the scanner itself is substantial in size and weight, it incorporates a kickstand and rugged construction, making it well-suited for demanding workshop environments.
Beyond standard features, the Phoenix Lite 2 boasts advanced functionalities such as live data graphing, detailed fault information, and a suite of sophisticated diagnostic tests typically reserved for high-end professional tools. Be mindful of the post-2-year firmware update subscription, which adds to the long-term cost of ownership.
Explore our in-depth Topdon Phoenix 2 Lite review for a complete understanding of its pro-level capabilities.
Best Dual-Purpose OBD2 Scanner: Ancel BD310
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
Ancel BD310: The Versatile OBD2 Scanner That Doubles as a Car Display
Read our expert review of the Ancel BD310
Key Specifications:
| Feature | Specification |
|---|---|
| Display/Size | Color/2 inches |
| Bluetooth/Handheld | Yes/Yes |
| I/M Readiness Test | Yes |
| Live Data Display | Yes |
| Number of Keys | 4 |
| Warranty | 3 years |
| Size | 5.1 x 2.4 x 0.6 inches |
| Weight | 5.4 ounces |
Reasons to Choose Ancel BD310:
- Lightweight and Compact: Highly portable and easy to store in your glovebox.
- Dual Functionality: Operates as both an OBD2 scanner and a secondary car display.
- Handheld and Bluetooth Scanning: Offers versatile connectivity options.
Considerations Before Choosing Ancel BD310:
- Minimalist Interface: The interface might be considered too simplistic by some users.
- Small Screen Size: The 2-inch display can feel cramped for viewing detailed data.
The Ancel BD310 distinguishes itself with its dual-purpose design, functioning as a traditional handheld OBD2 scanner and also as a supplementary display for your car’s vital engine statistics when connected to a smartphone via Bluetooth.
Its compact and lightweight form factor makes the BD310 exceptionally convenient to keep in your vehicle. While the 2-inch screen is admittedly small, and the four-button interface may feel slightly awkward initially, these minor drawbacks don’t hinder its core diagnostic capabilities.
The generous 56-inch cable provides ample reach while working under the hood, and the BD310 capably performs essential functions like I/M readiness tests and retrieving performance data, including coolant temperature, engine timing, and engine speed.
Consult our detailed Ancel BD310 review for a complete assessment of its dual capabilities.
Best OBD2 Scanner with Companion App: Carly OBD-II Scanner
(Image credit: Carly)
5. Carly OBD-II Scanner
Carly OBD-II Scanner: Unleashing Advanced Diagnostics, Tailored to Your Car
Explore our in-depth expert review of the Carly OBD scanner
Key Specifications:
| Feature | Specification |
|---|---|
| Display/Size | No |
| Bluetooth/Handheld | Yes/No |
| I/M Readiness Test | No |
| Live Data Display | Yes |
| Number of Keys | None |
| Warranty | Lifetime |
| Size | 2.9 x 1.5 x 0.7 inches |
| Weight | 0.7 ounces |
Reasons to Choose Carly OBD-II Scanner:
- User-Friendly App Interface: Offers an exceptionally intuitive and well-designed companion app.
- Extensive Customization Options: Provides a high degree of personalization for diagnostic preferences.
- Real-time Live Data Display: Monitors crucial car parameters in real-time.
- Maintenance and Repair Support: Goes beyond diagnostics to offer repair assistance.
- Lifetime Warranty and Updates: Ensures long-term value and peace of mind.
Considerations Before Choosing Carly OBD-II Scanner:
- Car Model Compatibility: Feature availability varies depending on your specific car make and model.
- Subscription Model for Advanced Features: Accessing advanced functionalities beyond basic OBD requires an ongoing subscription.
The Carly OBD Scanner stands out for its exceptional companion app, which elevates the entire user experience. While many Bluetooth scanners offer rudimentary apps, Carly provides a polished and feature-rich application that sets a new standard.
Beyond basic error code reading and clearing, the Carly app offers repair guidance, pre-purchase used car inspections, and a wealth of customization settings. The lifetime warranty is a rare and valuable perk, adding to the scanner’s long-term appeal.
However, it’s crucial to verify compatibility with your specific car model, as feature availability varies. Additionally, unlocking the full potential of the Carly scanner necessitates an active subscription, which can become costly if you require more than basic OBD functionalities.
Dive into our comprehensive Carly OBD scanner review to assess if it’s the right choice for your vehicle.
Other OBD2 Scanners We Evaluated
Innova CarScan Mobile 1000 Review Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a standout Bluetooth OBD2 scanner, inheriting Innova’s acclaimed features like predictive diagnostics in a completely wireless format. Its remarkably simple setup process further enhances its appeal as a Bluetooth-only solution.
Explore our detailed Innova CarScan Mobile 1000 review for a deeper look.
ThinkCar ThinkDiag TKD01 (★★★★☆)
While larger than typical Bluetooth OBD2 scanners, the ThinkCar ThinkDiag TKD01 compensates with exceptional durability. It offers a wide range of manufacturer-specific error codes and advanced fault-code analysis capable of resolving minor issues without requiring a mechanic. A subscription fee applies after the first year.
Read our full ThinkCar ThinkDiag TKD01 review for a comprehensive evaluation.
Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 is specifically engineered for diagnosing electrical problems, enhanced by an integrated multimeter. It excels at identifying issues like damaged wiring, short circuits, and blown fuses. It also provides extensive live data and pre-inspection readiness checks.
Consult our in-depth Autel AutoLink AL539 review for a detailed analysis.
Frequently Asked Questions About OBD2 Scanners
What exactly is an OBD2 Scanner?
Ever wondered how mechanics quickly pinpoint car troubles? They don’t dismantle your engine piece by piece. Instead, they utilize diagnostic scanners plugged into your car’s OBD port to access data from the onboard computer.
Basic OBD2 scanners read and interpret error codes flagged by your car’s computer when it detects a problem. More advanced models offer real-time system monitoring and can even predict potential future issues.
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 US since 1996, Canada since 1998, the EU since 2004, and Australia, Mexico, and New Zealand since 2006.
This port serves as the interface to your car’s onboard computer. Various devices can connect to it, including OBD2 scanners, insurance telematics devices, and modern dash cams.
If you’re unsure of your OBD2 port’s location, here’s a guide on finding your car’s OBD2 port for North American vehicles. For worldwide locations, refer to this guide on finding your OBD2/EOBD port globally.
What is a DTC?
DTC stands for Diagnostic Trouble Code. These are error codes generated by your car’s OBD system when it identifies a malfunction. OBD2 scanners read these codes, enabling users to diagnose the underlying issue. While many DTCs are standardized across vehicle makes and models, some manufacturers use proprietary DTCs specific to their vehicles.
Decoding DTCs: What Do They Actually Mean?
DTCs can appear cryptic at first glance, resembling random strings of letters and numbers. However, they follow a logical structure that reveals the nature of the detected problem.
The first character indicates the affected vehicle system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character, a number, signifies whether the code is generic (0) or manufacturer-specific (1).
The third character pinpoints the specific 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-specific propulsion system faults
The fourth and fifth characters specify the precise fault, ranging from 0 to 99.
OBD2 scanners translate these codes into understandable descriptions. Advanced scanners provide even more detailed information. Online resources like Google can also aid in DTC interpretation. It’s important to note that there are over 5,000 possible DTCs.
Not all DTCs signify critical issues. While they highlight significant problems, some codes may simply indicate minor anomalies, like a slightly elevated engine temperature.
Choosing the Right OBD2 Scanner for Your Needs in 2023
For valuable insights into your car’s health and potential issues, an OBD2 scanner is indispensable. It’s the same technology used by dealerships and repair shops, empowering you with the same diagnostic capabilities.
OBD2 scanners come in two primary types:
- Handheld OBD2 scanners: Feature an integrated screen and cable for direct connection to your car’s OBD port.
- Wireless OBD2 scanners: Plug into the OBD port and communicate wirelessly via Bluetooth with a smartphone or tablet for data display.
Regardless of the type, numerous high-performance OBD2 scanners are available for under $200, with some costing less than $30. Key considerations when selecting an OBD2 scanner include:
- Easy Setup: A quick and straightforward setup process ensures you’ll readily use the scanner for timely diagnostics.
- Fault Code Explanation: The best scanners not only display fault codes but also provide clear explanations, aiding in DIY repairs or informed communication with mechanics.
- I/M Readiness Check: A valuable feature for verifying emissions system readiness for state inspections.
- Accuracy: Reliable and accurate readings are paramount for effective diagnostics.
- Size and Weight: A compact and lightweight scanner is more likely to be kept readily accessible in your car for on-the-go diagnostics.
- Live Data: Real-time data monitoring of engine parameters is crucial for diagnosing intermittent problems.
- Graphs: Visual data representations, such as graphs, enhance data interpretation, especially for comparative analysis.
- Warranty: Opt for scanners with extended warranties, ideally lifetime warranties, for long-term value.
Choosing between handheld and wireless scanners depends on personal preference. Consider screen size and clarity for handheld units. For all types, prioritize lifetime warranty or software updates to ensure continued compatibility with evolving automotive technology. Rugged scanners with shock-absorbing bumpers are beneficial for users prone to accidental drops.
Additional features to consider include electrical multimeter functionality, manufacturer-specific code access, and PDF report generation. Remarkably, sophisticated OBD2 scanners are available at prices comparable to an hour of labor at a repair shop, making them a cost-effective investment for proactive car maintenance.
How We Tested the Top OBD2 Scanners
To rigorously evaluate the best OBD2 scanners, we employed a 2014 Audi A4 Allroad over several weeks in diverse driving conditions. Each scanner was connected to the vehicle’s OBD2 port, verifying VIN reporting accuracy.
Wireless scanners were paired with Apple iPads, Microsoft Surface tablets, and Samsung Galaxy S9+ phones via Bluetooth or Wi-Fi. Handheld scanners were solely connected to the OBD2 port for power and data.
Cord lengths (for handheld scanners) and wireless ranges were measured. With the engine running, we monitored engine performance and vital systems. To simulate a fault, we intentionally disconnected the engine oil temperature sensor.
We then assessed the scanner’s ability to identify and describe the fault, cleared the error code after reconnecting the sensor, and verified error code erasure.
On-road testing involved monitoring live operating data such as engine speed, timing, and coolant temperature, evaluating data presentation in numerical, graphical, or gauge formats.
Understanding OBD2 fault codes is essential. All codes consist of four numbers and a letter prefix:
- Powertrain (P)
- Body (B)
- Chassis (C)
- Undefined (U)
Of the approximately 5,000 diagnostic fault codes, generic codes (starting with ‘0’) apply universally to all vehicles, covering common issues like air temperature and throttle position. Manufacturer-specific codes (starting with ‘1’) are unique to particular carmakers, indicating specialized hardware or in-depth problem analysis.
For example, a P0098 code typically points to an intake air temperature sensor issue. In contrast, a Ford-specific P1112 code indicates intermittent intake air temperature sensor readings requiring sensor replacement.
More From Tom’s Guide
Explore more of Tom’s Guide’s automotive tech coverage.
