Unlocking the complexities of your car’s internal systems no longer requires a trip to the mechanic. Modern vehicles are equipped with onboard computers that constantly monitor their health, and the best OBD2 scanners act as your personal translator, accessing this wealth of information. Whether you’re facing a perplexing dashboard light or suspect underlying engine issues, an OBD2 scanner empowers you to understand and address these problems directly, potentially saving you time and money.
However, the world of OBD2 scanners can seem daunting, especially for beginners. With countless options available, discerning the truly effective tools from the rest can be challenging. At Autown, our team of automotive experts has rigorously tested a wide array of OBD2 scanners over years of hands-on evaluations. We understand the nuances of these devices and are here to guide you towards making an informed decision.
Our comprehensive review process has identified standout performers across various categories. For those prioritizing wireless convenience and advanced features, the Topdon TopScan emerges as a clear leader. If budget is a primary concern, the remarkably affordable Launch CR529 delivers exceptional value. And for users demanding professional-grade diagnostics, the Topdon Phoenix Lite 2 offers an experience akin to what you’d find in a professional garage, albeit at a premium price.
Below, we present our top recommendations for the best OBD2 scanners currently on the market. Continue reading to delve deeper into the specifics of each scanner, understand their strengths, and learn how OBD2 scanners work to decipher those cryptic error codes.
Tom Pritchard
Expert Car Diagnostic Technician at Autown
Tom is Autown’s lead expert in vehicle diagnostics and repair tools, with extensive experience testing and reviewing automotive technology. He is passionate about empowering car owners with the knowledge and tools to maintain their vehicles effectively.
Autown’s Top OBD2 Scanner Picks: Quick List
For those in a hurry, here’s a quick rundown of our best OBD2 scanner selections. Scroll down for detailed reviews and buying advice.
1. Topdon TopScan: Best Mobile OBD2 Scanner
The Topdon TopScan stands out as the easiest Bluetooth scanner to set up and use, according to our extensive testing. Despite its compact size, it packs a punch with professional-grade features, including comprehensive diagnostics, repair guidance, parts information, and even predictive analysis to anticipate potential issues.
Dive Deeper into the Topdon TopScan Review
2. Launch CR529: Best Cheap OBD2 Scanner
Don’t let the low price fool you. The Launch CR529 is a small but mighty OBD2 scanner offering an impressive range of features typically found in higher-priced models. Lifetime support and updates further enhance its value, making it an unbeatable choice for budget-conscious users.
Explore the Value of the Launch CR529
Best Professional-Grade Scanner
3. Topdon Phoenix Lite 2: Best Pro-Level OBD2 Scanner
Resembling a rugged handheld gaming device, the Topdon Phoenix Lite 2 is more than just a durable tool. Engineered for both professional mechanics and serious DIYers, this powerful scanner delivers advanced diagnostics in a robust package. It’s the ideal choice when you need a scanner that can withstand demanding environments and provide in-depth analysis.
Uncover the Power of the Topdon Phoenix Lite 2
4. Ancel BD310: Best Dual-Purpose OBD2 Scanner
The Ancel BD310 offers versatility by functioning both as a standard OBD2 scanner and an auxiliary dashboard display. Its sleek design, smartphone compatibility, and affordable price make it a compelling option for everyday use.
Discover the Versatility of the Ancel BD310
Best Scanner with Companion App
5. Carly OBD2 Scanner: Best Scanner with a Companion App
The Carly OBD2 Scanner’s utility is highly dependent on your car’s make, with Volkswagen, BMW, and Ford vehicles benefiting the most from its extensive features. However, its exceptional companion app, boasting a wide array of customization options and professional-level tests, sets it apart.
Explore the Smart Features of the Carly OBD2 Scanner
Autown’s Detailed OBD2 Scanner Reviews: Finding the Right Tool for You
At Autown, we believe in empowering car owners with the knowledge and tools to confidently maintain their vehicles. Our in-depth reviews are designed to provide you with all the information you need to choose the best OBD2 scanner for your specific needs and budget. We rigorously test each scanner, evaluating its ease of use, diagnostic capabilities, features, and overall value.
1. Topdon TopScan: Best Mobile OBD2 Scanner
(Image credit: Topdon)
Check out the Topdon TopScan
Perfect for: Users who want a compact, wireless OBD2 scanner with advanced diagnostic capabilities and performance monitoring.
Expert Review by Autown:
Don’t be deceived by its unassuming appearance. The Topdon TopScan is a powerhouse of automotive diagnostics packed into a small, Bluetooth-enabled device. This isn’t just a basic OBD2 module; it goes far beyond the capabilities of many competitors in its class. During our testing at Autown, we were particularly impressed by its comprehensive features that extend beyond basic fault code reading.
The TopScan excels in more than just identifying error codes and performing I/M Readiness tests. It pushes the boundaries by offering performance and efficiency analysis, even estimating your vehicle’s horsepower and torque. Features like these are often absent in OBD2 scanners costing significantly more, making the TopScan an exceptional value for both car enthusiasts and those focused on maintaining vehicle health.
Whether you’re aiming to fine-tune your car’s performance or simply ensure its roadworthiness, the Topdon TopScan is an invaluable addition to your toolkit.
Key Features:
- Excellent Diagnostic Coverage: Provides in-depth access to your car’s systems.
- Live Data Streaming: Monitors real-time vehicle parameters for comprehensive analysis.
- Performance Indicators: Estimates horsepower and torque for performance enthusiasts.
- Maintenance Item Coverage: Helps track and manage essential maintenance tasks.
Considerations:
- Larger Transmitter: The Bluetooth transmitter is somewhat bulky.
- Subscription for Full Features: Some advanced features may require a subscription after the first year.
Read Autown’s Full Topdon TopScan Review
2. Launch CR529: Best Cheap OBD2 Scanner
(Image credit: Future)
Explore the Launch CR529
Perfect for: Budget-conscious users seeking a capable and reliable handheld OBD2 scanner for basic diagnostics and pre-inspection checks.
Expert Review by Autown:
In our expert opinion at Autown, the Launch CR529 represents exceptional value in the OBD2 scanner market. Its incredibly affordable price point doesn’t compromise its diagnostic capabilities. We were genuinely surprised by the level of features packed into this budget-friendly device during our hands-on testing.
While compromises are expected at this price, such as the lack of manufacturer-specific codes and a slightly heavier feel, the CR529 still delivers essential features effectively. It provides live data streaming, a convenient instant inspection function, and surprisingly detailed insights into your car’s internal systems. The inclusion of lifetime updates is a significant bonus, ensuring long-term usability without subscription fees.
While the CR529 might not cater to professional mechanics needing advanced manufacturer-specific diagnostics, it’s an excellent choice for everyday car owners and DIY enthusiasts looking for a reliable and affordable OBD2 scanner.
Key Features:
- Extremely Affordable: One of the most budget-friendly OBD2 scanners available.
- Lifetime Updates: Ensures long-term compatibility and feature enhancements.
- Easy Pre-Inspection Report: Streamlines vehicle inspection readiness checks.
Considerations:
- Limited Manufacturer-Specific Codes: Does not support specialized manufacturer diagnostic codes.
- Heavier Handheld Feel: May feel slightly bulky compared to lighter scanners.
- 1-Year Warranty: Shorter warranty period compared to some competitors.
Read Autown’s Comprehensive Launch CR529 Review
3. Topdon Phoenix Lite 2: Best Pro-Level OBD2 Scanner
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(Image credit: Future)
Explore the Topdon Phoenix Lite 2
Perfect for: Serious DIYers and professional mechanics seeking a powerful, feature-rich OBD2 scanner with advanced diagnostics and wireless capabilities.
Expert Review by Autown:
The Topdon Phoenix Lite 2 represents a significant investment in automotive diagnostic tools, positioning itself above many other capable OBD2 scanners. However, as our expert testing at Autown confirms, the features and capabilities justify the higher price tag. This scanner effectively bridges the gap between amateur and professional-level diagnostics.
A standout feature of the Phoenix Lite 2 is its completely wireless operation. The control pad connects via Bluetooth to a receiver plugged into your car’s OBD port, offering unparalleled freedom of movement around the vehicle during diagnostics. While the scanner itself is substantial in size and weight, it includes a kickstand and ruggedized design built to withstand demanding workshop environments.
Beyond its robust build and wireless convenience, the Phoenix Lite 2 offers advanced features like live data graphing, detailed fault information, and numerous other functionalities typically found only in professional-grade equipment. However, it’s important to note the subscription model for firmware updates after the initial two years, which adds to the long-term cost.
Key Features:
- Near Professional-Grade OBD Scanner: Offers advanced diagnostics comparable to professional tools.
- Hybrid Handheld with Wi-Fi and Bluetooth: Provides versatile connectivity options.
- Large 8-inch Touchscreen: Offers a user-friendly and detailed display.
- Extensive Diagnostic Tests and Live Data: Provides comprehensive vehicle analysis.
- Includes Adapters and Hard Case: Offers added value and protection.
Considerations:
- Bulky and Heavy: Larger and heavier than many other OBD2 scanners.
- High Price: Significantly more expensive than entry-level and mid-range options.
- Subscription Required After 2 Years: Firmware updates require a paid subscription after the initial period.
Read Autown’s In-Depth Topdon Phoenix 2 Lite Review
4. Ancel BD310: Best Dual-Purpose OBD2 Scanner
Ancel BD310 (Image credit: Tom’s Guide)
Discover the Ancel BD310
Perfect for: Users seeking a compact, lightweight OBD2 scanner that can also function as a secondary dashboard display.
Expert Review by Autown:
The Ancel BD310 stands out for its dual functionality, serving as both a standard handheld OBD2 scanner and a supplementary display for your car’s vital engine data. Its ability to connect to smartphones via Bluetooth further enhances its versatility, as observed during our testing at Autown.
Its compact and lightweight design makes the BD310 exceptionally portable and easy to store in your glovebox. While the 2-inch display is somewhat small, and the four-button interface takes a little getting used to, these minor drawbacks don’t significantly hinder its diagnostic capabilities.
The included 56-inch cable provides ample reach while working under the hood, and the BD310 effectively performs essential functions like I/M readiness tests and displaying performance data, including coolant temperature, engine timing, and engine speed.
Key Features:
- Light and Compact: Highly portable and easy to store.
- Dual Functionality: Works as both a scanner and a secondary car display.
- Handheld and Bluetooth Scanning: Offers flexible connectivity options.
Considerations:
- Minimalist Interface: The interface may be too basic for some users.
- Small Screen: The 2-inch display can feel cramped.
Read Autown’s Detailed Ancel BD310 Review
5. Carly OBD2 Scanner: Best Scanner with a Companion App
(Image credit: Carly)
Explore the Carly OBD2 Scanner
Perfect for: Owners of compatible vehicles (especially VW, BMW, and Ford) who prioritize a user-friendly companion app with advanced customization and diagnostic features.
Expert Review by Autown:
The Carly OBD2 Scanner distinguishes itself with its exceptional companion app, setting a new standard for user experience in Bluetooth OBD2 scanners. While some Bluetooth scanners offer rudimentary apps, Carly provides one of the most feature-rich and intuitive apps we’ve encountered at Autown.
Beyond basic fault code reading and clearing, the Carly app offers repair guidance, used car inspection tools, and extensive customization options. The lifetime warranty is a rare and valuable benefit, adding to its appeal.
However, the Carly’s functionality is heavily dependent on vehicle compatibility. While it offers broad OBD2 capabilities, the advanced features and manufacturer-specific diagnostics are most comprehensive for brands like VW, BMW, and Ford. Additionally, accessing the full suite of features beyond basic OBD functions requires an ongoing subscription, which can become costly over time.
Key Features:
- User-Friendly Interface: Easy to navigate and operate.
- Extensive Customization Options: Allows personalization of scanner functions.
- Live Data Display: Provides real-time vehicle parameter monitoring.
- Maintenance and Repair Coverage: Offers guidance for vehicle maintenance and repairs.
- Lifetime Warranty and Updates: Ensures long-term support and value.
Considerations:
- Vehicle Compatibility Limitations: Feature availability varies significantly across car makes and models.
- Subscription Costs: Full feature access requires an ongoing subscription.
Read Autown’s In-Depth Carly OBD Scanner Review
Other OBD2 Scanners Tested by Autown
Beyond our top picks, Autown’s expert team has tested numerous other OBD2 scanners. Here are a few notable alternatives:
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Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 stands out as a highly innovative Bluetooth OBD2 scanner. It inherits Innova’s impressive features, including predictive diagnostics, in a completely wireless, phone-based format. Its incredibly simple setup process further contributes to its appeal as a Bluetooth-only option.
Read Autown’s Full Innova CarScan Mobile 1000 Review
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ThinkCar ThinkDiag TKD01 (★★★★☆)
While larger than typical Bluetooth OBD2 scanners, the ThinkCar ThinkDiag TKD01’s robust build makes it exceptionally durable. Its advantages include a wide range of manufacturer-specific error codes and extended fault codes capable of resolving minor issues without mechanical intervention. However, a subscription fee of $40 per year is required after the first year.
Read Autown’s Full ThinkCar ThinkDiag TKD01 Review
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Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 OBD2 scanner is specifically designed for diagnosing electrical problems, enhanced by its integrated multimeter. This feature enables it to identify issues such as burnt cables, electrical shorts, and blown fuses. It also offers extensive live data capabilities and the ability to perform pre-inspection readiness checks.
Read Autown’s Full Autel AutoLink AL539 Review
Frequently Asked Questions About OBD2 Scanners
What exactly is an OBD2 Scanner?
Ever wondered how mechanics quickly pinpoint car problems? They don’t dismantle the engine piece by piece. Instead, they use diagnostic scanners plugged into your car’s OBD port to access data from the onboard computer.
At its core, an OBD2 scanner reads and interprets error codes generated by your car when it detects an issue. More advanced scanners offer real-time system monitoring and even predict potential future problems.
What is the OBD2 Port and Where Do I Find It?
The On-Board Diagnostics Version Two (OBD2) port is a standardized port 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 point for accessing your car’s onboard computer. Various devices can connect to the OBD2 port, including OBD2 scanners, insurance telematics devices, and dashcams.
If you’re unsure of your OBD2 port’s location, here’s a guide to finding your car’s OBD2 port in North American vehicles. For worldwide locations, refer to this guide on finding your OBD2/EOBD port globally.
Understanding DTCs: Diagnostic Trouble Codes
DTC stands for Diagnostic Trouble Code. These are error codes generated by your car’s OBD system when it detects a problem. OBD2 scanners read these codes, enabling users to understand the nature of the issue. While many DTC codes are standardized across vehicle makes and models, some manufacturers use proprietary DTCs specific to their vehicles.
Decoding DTCs: What Do They Actually Mean?
DTCs may appear as gibberish – random letters and numbers. However, they follow a logical structure to indicate the type and location of the problem.
The first letter denotes the affected vehicle system: Powertrain (P), Body (B), Chassis (C), and 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
- 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.
OBD2 scanners translate these codes into understandable descriptions. Advanced models provide even more detailed information. While scanners provide explanations, online resources like Google can further assist in deciphering the over 5,000 possible DTC errors.
Importantly, not all DTCs signify critical problems. While they flag major issues, some may simply indicate minor concerns like a slightly elevated engine temperature.
Choosing the Right OBD2 Scanner for Your Needs: Autown’s Buying Guide
If you’re seeking insights into your car’s operation or diagnosing a problem, an OBD2 scanner is an invaluable tool. It provides the same diagnostic capabilities used by dealerships and repair shops, putting you in control of your car’s health.
When selecting an OBD2 scanner, understand that not all are created equal. The primary types are:
- 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 smartphones or tablets for display and operation.
Regardless of the type, numerous high-quality OBD2 scanners are available for under $200, with some costing less than $30. The key is to find the best balance of features, ease of use, and diagnostic accuracy. Here are crucial criteria to consider, according to Autown’s expert testing:
- Easy Setup: A scanner that’s quick and straightforward to set up encourages frequent use for early problem detection.
- Fault Code Explanation: The best scanners not only display fault codes but also provide clear explanations, empowering you to understand the issue and decide on repair actions.
- I/M Readiness Check: A valuable feature for pre-emission test assessments, ensuring your car will pass inspections.
- Accuracy: Accurate diagnostics are paramount. Incorrect information is worse than no information.
- Size and Weight: A compact and lightweight scanner is more likely to be kept in your car for on-the-go diagnostics.
- Live Data: Real-time data monitoring of engine parameters aids in diagnosing intermittent issues.
- Graphs: Visual data representation, especially graphs, enhances data interpretation and comparison over time.
- Warranty: Consider the scanner’s warranty, ideally seeking lifetime warranties for long-term value.
When choosing, first decide between handheld and wireless scanners based on your preference for screen integration or smartphone connectivity. Prioritize scanners with lifetime updates or warranties for longevity and continued compatibility. For handheld scanners, opt for the largest, clearest, and most user-friendly display. If durability is a concern, ruggedized scanners with shock-absorbing bumpers are recommended.
Explore extra features like electrical multimeters, manufacturer-specific code reading, and PDF report exporting, available on some models. Ultimately, the price of even sophisticated OBD2 scanners is comparable to a fraction of a mechanic’s hourly labor, making them a cost-effective investment.
Autown’s OBD2 Scanner Testing Methodology
Autown’s rigorous OBD2 scanner testing process ensures our reviews are based on real-world performance and expert evaluation. Our lead technician, Tom Pritchard, personally tests each scanner on a 2014 Audi A4 Allroad over several weeks in various driving conditions.
The testing methodology includes:
- VIN Verification: Ensuring each scanner correctly identifies the vehicle identification number (VIN).
- Connectivity Testing: Evaluating Bluetooth or Wi-Fi connection stability and range for wireless scanners; assessing cable length for handheld units.
- Live Data Monitoring: Observing real-time engine and system data during vehicle operation.
- Fault Code Generation and Reading: Simulating a fault (e.g., disconnecting the oil temperature sensor) to assess the scanner’s ability to detect, report, and explain error codes.
- Fault Clearing: Verifying the scanner’s ability to clear fault codes and turn off the check engine light after issue resolution.
- Performance Data Analysis: Evaluating the scanner’s presentation of operating data (numerical, graphical, gauges) during road testing, focusing on parameters like engine speed, timing, and coolant temperature.
This comprehensive testing approach allows Autown to provide accurate, reliable, and helpful OBD2 scanner reviews, empowering you to make informed decisions.
In conclusion, investing in the right OBD2 scanner can transform your car maintenance experience. By understanding your needs and utilizing Autown’s expert reviews and buying guide, you can choose the perfect OBD2 scanner to confidently diagnose and maintain your vehicle, saving time and money while gaining valuable insights into your car’s health.
