The Best Obd Car Scanners are essential tools for modern car owners, acting as a vital link to your vehicle’s onboard computer and unlocking a wealth of information. If you’ve ever been puzzled by a mysterious dashboard light or suspected an issue with your car, an OBD-II scanner can empower you to understand what’s happening under the hood without immediately resorting to expensive professional diagnostics.
However, the world of OBD-II scanners can seem daunting, especially for beginners. With a wide range of options available, it’s crucial to choose a scanner that suits your needs and technical expertise. Fortunately, we’ve rigorously tested numerous OBD-II scanners to identify the top performers on the market. Keep reading to discover our recommendations and gain a deeper understanding of how OBD-II scanners function and what those cryptic error codes truly signify.
Our top selections include the Topdon TopScan, a remarkably user-friendly wireless scanner packed with diagnostic capabilities, and the Launch CR529, an incredibly affordable option that delivers exceptional value. For those seeking professional-grade features, the Topdon Phoenix Lite 2 provides a comprehensive diagnostic experience, albeit at a premium price.
Here’s a quick look at the best OBD car scanners you can buy right now:
- Topdon TopScan: Best mobile OBD-II scanner
- Launch CR529: Best cheap OBD-II scanner
- Topdon Phoenix Lite 2: Best pro-level OBD-II scanner
- Ancel BD310: Best dual-purpose OBD-II scanner
- Carly OBD-II Scanner: Best scanner with a companion app
Scroll down to explore detailed reviews of each of these top OBD car scanners and learn more about their features and benefits.
Tom Pritchard
Tom is the Tech Editor and an expert in automotive technology. He rigorously tests and reviews car gadgets and tools, providing in-depth analysis to help you make informed decisions. He is also passionate about electric vehicles and advocates for sustainable automotive solutions.
Top OBD Car Scanner Picks: Quick Overview
Here are the best OBD-II scanners available today, based on our thorough hands-on testing. Continue reading for detailed insights into each model and what makes them stand out.
Topdon TopScan mobile OBD2 scanner for vehicle diagnostics
1. Topdon TopScan
Best Mobile OBD-II Scanner
The Topdon TopScan is an incredibly user-friendly Bluetooth scanner that stands out for its ease of setup and professional-grade features, all within a compact design. It provides comprehensive diagnostics, repair guidance, parts lists, and even predictive analysis to anticipate potential issues before they escalate.
Read more about Topdon TopScan
Launch CR529 OBD-II scanner, a budget-friendly car diagnostic tool
2. Launch CR529
Best Cheap OBD-II Scanner
The Launch CR529 is a small yet powerful OBD-II scanner that delivers all the essential functionalities you’d expect, along with some advanced features typically found in higher-priced models. Its lifetime support and updates ensure exceptional value for your money.
Read more about Launch CR529
Topdon Phoenix Lite 2 professional OBD-II scanner with tablet interface
3. Topdon Phoenix Lite 2
Best Pro-Level OBD-II Scanner
The Topdon Phoenix Lite 2 resembles a rugged tablet for your car’s computer, boasting a robust horizontal case designed for both professionals and experienced DIYers. It’s a powerful scanner built to withstand demanding environments while providing advanced diagnostic capabilities.
Read more about Topdon Phoenix Lite 2
Ancel BD310 dual-purpose OBD2 scanner and car dashboard display
4. Ancel BD310
Best Dual-Purpose OBD-II Scanner
The Ancel BD310 is a versatile tool that functions as both an OBD-II scanner and a supplementary dashboard display, offering a range of engine specifications. It combines a sleek design, smartphone compatibility, and an attractive price point.
Read More about Ancel BD310
Carly OBD-II Scanner with companion app for enhanced car diagnostics
5. Carly OBD-II Scanner
Best Scanner with a Companion App
The Carly OBD-II Scanner’s utility depends on your car make, with brands like VW, BMW, and Ford benefiting most from its features. However, its standout feature is its exceptional companion app, offering extensive customization options and professional-level diagnostic tests.
Read more about Carly OBD-II Scanner
Detailed Reviews: Finding the Best OBD Car Scanner for Your Needs
Why Trust Our Expertise? At [Your Website Name – e.g., obd2scanner.store], our content creators and automotive experts dedicate countless hours to evaluating and comparing automotive products, tools, and accessories to guide you toward the optimal choices for your vehicle. [Link to your “How We Test” or “About Us” page].
Best Mobile OBD-II Scanner
(Image credit: Topdon)
1. Topdon TopScan
Perfect for Deep-Dive Car Diagnostics
Read our Expert Review of Topdon TopScan
Key Specifications:
- Display/size: None (App-based)
- Bluetooth/handheld: Yes/No
- I/M Readiness test: Yes
- Live data display: Yes
- Number of keys: None (App-controlled)
- Warranty: 2 year
- Size: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Excellent and extensive vehicle diagnostic coverage
- Real-time live data monitoring
- Unique vehicle performance indicators
- Comprehensive maintenance item coverage
Reasons to Avoid:
- Larger transmitter can feel bulky
- Advanced features may require subscription after the first year
The Topdon TopScan may appear deceptively simple at first glance, but this compact scanner is packed with features that go far beyond basic OBD-II diagnostics. This isn’t just a standard Bluetooth OBD-II module; it’s a powerful tool designed to provide in-depth insights into your car’s health and performance. We were particularly impressed by its ability to go beyond basic fault code reading and offer performance and efficiency analysis, even estimating horsepower and torque – features often found in scanners costing ten times as much.
Whether you’re aiming to optimize your car’s performance or simply ensure it remains in top roadworthy condition, the Topdon TopScan is an invaluable addition to your toolkit. Its wireless Bluetooth connectivity and user-friendly app interface make it incredibly convenient to use.
For a more detailed analysis, read our comprehensive Topdon TopScan review.
Best Cheap OBD-II Scanner
(Image credit: Future)
2. Launch CR529
Unbeatable Value Under $50
Explore our Expert Review of Launch CR529
Key Specifications:
- 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 Buy:
- Exceptionally affordable
- Lifetime free updates
- Convenient pre-inspection report feature
Reasons to Avoid:
- Does not support manufacturer-specific specialty codes
- May feel slightly heavy
- Limited 1-year warranty
The Launch CR529 redefines value in OBD-II scanners, delivering an impressive array of diagnostic features at an incredibly low price point. For its price, the level of functionality is truly remarkable. While it’s important to acknowledge certain limitations, such as the absence of manufacturer-specific codes and a slightly hefty feel, the CR529 still provides essential features like live data, instant inspection reports, and a surprisingly detailed look into your vehicle’s systems. The inclusion of lifetime updates further enhances its long-term value, eliminating the need for subscriptions.
While the CR529 may not cater to professional mechanics demanding advanced features, it’s an ideal choice for car owners seeking a reliable and budget-friendly OBD car scanner for everyday diagnostics and maintenance.
Read our in-depth Launch CR529 review for a complete analysis.
Best Pro-Level OBD-II Scanner
Topdon Phoenix Lite 2 OBD2 scanner used for professional car diagnostics
(Image credit: Future)
3. Topdon Phoenix Lite 2
Professional Diagnostics for Amateurs and Experts Alike
View our Expert Review of Topdon Phoenix Lite 2
Key Specifications:
- Display/size: Color/8-inch Touchscreen
- Bluetooth/handheld: Yes/Yes (Wireless and Handheld)
- I/M Readiness test: Yes
- Live data display: Yes
- Number of keys: Touchscreen interface
- Warranty: 2 years
- Size: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Reasons to Buy:
- Near-professional grade OBD scanner capabilities
- Hybrid handheld design with Wi-Fi and Bluetooth connectivity
- Large 8-inch touchscreen display
- Extensive array of diagnostic tests and live data parameters
- Includes adapters and a protective hard case
Reasons to Avoid:
- Bulky, heavy, and can be cumbersome to handle
- Higher price point compared to other scanners
- Subscription required for updates after two years
The Topdon Phoenix Lite 2 represents a significant investment, positioned at a higher price point than many other capable OBD-II scanners. However, it justifies its cost by offering a near-professional level of diagnostic capability suitable for both experienced DIY enthusiasts and professional mechanics. Its wireless design, with a Bluetooth-connected control pad and OBD port receiver, provides exceptional freedom of movement around the vehicle. While the scanner unit itself is substantial in size and weight, it features a built-in kickstand and rugged construction, ensuring durability in workshop environments.
Beyond basic code reading, the Phoenix Lite 2 excels in advanced features, including live data graphing, detailed fault information, and a range of sophisticated diagnostic functions typically reserved for high-end professional tools. It’s important to note the subscription model for updates after the initial two years, which adds to the long-term cost.
Delve deeper into its features with our full Topdon Phoenix 2 Lite review.
Best Dual-Purpose OBD-II Scanner
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
OBD-II Scanner and Car Display in One
Read our Expert Review of Ancel BD310
Key Specifications:
- Display/size: Color/2 inches
- Bluetooth/handheld: Yes/Yes (Bluetooth and Handheld)
- 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 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 may lack visual appeal for some
- Small 2-inch screen
The Ancel BD310 offers a unique dual functionality, serving as a standard handheld OBD scanner and, when paired with a smartphone via Bluetooth, transforming into a supplementary display for crucial engine data within your car’s cabin. Its compact and lightweight design makes it exceptionally portable and easy to store in your glove compartment. While the 2-inch display is relatively small and the four-key interface might feel slightly basic, these design choices contribute to its portability and ease of use for essential diagnostics.
The 56-inch cable provides ample reach for comfortable use while working under the hood. The BD310 effectively performs core OBD-II functions, including I/M readiness tests and displaying performance metrics like coolant temperature, engine timing, and speed.
Explore the full capabilities in our Ancel BD310 review.
Best Companion App
(Image credit: Carly)
5. Carly OBD-II Scanner
App-Enhanced Diagnostics, Car Dependent Features
See our Expert Carly OBD-II Scanner Review
Key Specifications:
- Display/Size: No (App-based)
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: No
- Live data display: Yes
- Number of 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 and intuitive app interface
- Extensive customization options within the app
- Real-time live data display on your smartphone
- Covers maintenance and repair procedures
- Lifetime warranty and software updates
Reasons to Avoid:
- Feature availability varies significantly across car models
- App subscription can become costly for advanced features
The Carly OBD Scanner distinguishes itself with its exceptional companion app, setting a new standard for user experience among Bluetooth OBD-II scanners. While many Bluetooth scanners offer basic app functionality, Carly provides a remarkably sophisticated and feature-rich app interface. Beyond basic diagnostics, the app offers repair assistance, used car checks to prevent buying a problematic vehicle, and a generally seamless user experience. The lifetime warranty adds further value and peace of mind.
However, the Carly’s functionality is heavily dependent on your specific car make and model. Full feature access is primarily geared towards brands like VW, BMW, and Ford. Furthermore, accessing advanced features beyond basic OBD-II functionality requires an ongoing subscription, which can add to the overall cost.
Read our detailed Carly OBD scanner review for a complete feature breakdown.
Other OBD-II Scanners We’ve Tested
- Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a standout Bluetooth OBD-II scanner, inheriting Innova’s renowned features like predictive diagnostics in a completely wireless, phone-based format. Its incredibly simple setup process combined with powerful features makes it a compelling Bluetooth-only option.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 Bluetooth OBD2 scanner for in-depth diagnostics
- ThinkCar ThinkDiag TKD01 (★★★★☆)
While larger than typical Bluetooth OBD-II adapters, the ThinkCar ThinkDiag TKD01’s robust build makes it exceptionally durable. It offers extensive manufacturer-specific error codes and advanced fault-code analysis, potentially resolving minor issues without requiring a mechanic. A subscription is required after the first year.
Read our full ThinkCar ThinkDiag TKD01 review.
- Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 is specifically designed for diagnosing electrical issues, incorporating a built-in multimeter. This allows it to identify problems like damaged wiring, short circuits, and blown fuses. It also provides comprehensive live data and pre-inspection readiness checks.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions About OBD-II Scanners
What is an OBD-II Scanner?
OBD-II scanners are diagnostic tools that mechanics and car owners use to understand a vehicle’s health. Instead of manually inspecting every component, these scanners plug into your car’s OBD port to access data from the onboard computer.
At their most basic, OBD-II scanners read and interpret Diagnostic Trouble Codes (DTCs) generated by your car when it detects a problem. More advanced scanners can monitor vehicle systems in real-time and even predict potential future issues. Using the best OBD car scanner allows you to take a proactive approach to vehicle maintenance.
What is the OBD-II Port?
The On-Board Diagnostics Version Two (OBD-II) port is a standardized interface found in nearly all passenger vehicles sold in the United States since 1996, Canada since 1998, the European Union since 2004, and other regions like Australia, Mexico, and New Zealand since 2006.
This port serves as the connection point for interfacing with your car’s computer. Various devices can utilize the OBD-II port, including OBD-II scanners, insurance telematics devices, and increasingly, dash cameras.
If you’re unsure of your OBD-II port’s location, you can find guides on locating the OBD-II port for North American cars here and worldwide OBD-II/EOBD port locations here.
What is a DTC?
DTC stands for Diagnostic Trouble Code. These are error codes generated by a vehicle’s OBD system when it identifies a problem. OBD-II scanners interpret these codes, allowing users to diagnose the source of issues within the vehicle. While many DTCs are standardized across vehicle makes and models, some manufacturers utilize proprietary DTCs specific to their vehicles. Understanding DTCs is key to using any OBD car scanner effectively.
What do DTCs Actually Mean?
DTCs may appear as a jumble of letters and numbers, but they follow a logical structure to indicate the type and location of a problem. Understanding this structure can help you interpret error codes even without a scanner’s interpretation.
The first character indicates the affected vehicle system:
- P – Powertrain (engine and transmission)
- B – Body (interior and exterior body components)
- C – Chassis (braking, suspension, and steering)
- N – Network (communication systems)
The second character is a number: 0 for a generic code (standard across manufacturers) and 1 for a manufacturer-specific code.
The third character specifies the subsystem within the broader system category:
- 1 – Fuel and air metering
- 2 – Injector circuit (fuel and air metering)
- 3 – Ignition system or misfire
- 4 – Auxiliary emissions control
- 5 – Vehicle speed controls 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 are numbers from 0 to 99, further pinpointing the specific fault.
OBD-II scanners translate these codes into understandable descriptions. Advanced scanners offer more detailed information, but online resources and a search engine like Google can also help decipher DTCs. It’s important to remember there are thousands of possible DTCs.
Not all DTCs indicate critical problems. While they signal issues, some may simply be warnings, such as a slightly elevated engine temperature. The best OBD car scanner will help you differentiate between critical and minor issues.
How to Choose the Best OBD Car Scanner for You
For gaining insights into your car’s operation and diagnosing potential problems, an OBD-II scanner is an invaluable tool. It provides access to the same diagnostic information used by dealerships and repair shops. Choosing the best OBD car scanner depends on your needs and preferences.
OBD-II scanners generally fall into two categories:
- Handheld OBD-II scanners: These units have their own display screen and connect to the OBD port via a cable.
- Wireless OBD-II scanners: These plug into the OBD port and communicate wirelessly via Bluetooth to a smartphone or tablet for displaying data.
Regardless of the type, numerous high-quality OBD-II scanners are available for under $200, and some are even priced below $30. Key considerations when choosing the best OBD car scanner include:
- Easy Setup: A scanner should be easy to set up and use, allowing for quick diagnostics.
- Faults and Explanations: The best scanners not only display fault codes but also provide clear explanations to aid in understanding and repair.
- I/M Readiness Check: A valuable feature for emissions testing, this checks if your car will pass state inspections.
- Accuracy: Accurate readings are crucial; unreliable data renders a scanner useless.
- Size and Weight: A compact and lightweight scanner is more likely to be kept in your car for on-the-go diagnostics.
- Live Data: Access to real-time engine data helps in diagnosing intermittent issues.
- Graphs: Visual data representation through graphs enhances data analysis, especially for comparisons.
- Warranty: Look for scanners with a good warranty, ideally lifetime, reflecting product quality and longevity.
Choosing between wireless and handheld depends on personal preference. Consider screen size and clarity for handheld scanners – a larger, brighter, icon-based display is preferable. For ruggedness, some scanners offer rubberized housings for added durability.
Additional features to consider include electrical multimeter functionality, manufacturer-specific code reading, and report export capabilities (e.g., PDF).
The affordability of even sophisticated OBD-II scanners, often under $100, makes them a worthwhile investment, potentially saving you significant repair costs compared to professional mechanic fees. Investing in the best OBD car scanner for your needs is a smart move for any car owner.
How We Test OBD-II Scanners
To rigorously evaluate OBD2 scanners, we utilize a 2014 Audi A4 Allroad, testing each device in both garage and on-road conditions over several weeks. Our testing process includes:
- VIN Verification: Ensuring each scanner correctly reads and reports the vehicle identification number (VIN).
- Connectivity Testing: For wireless scanners, we test Bluetooth and Wi-Fi connections with devices like Apple iPads, Microsoft Surface tablets, and Samsung Galaxy smartphones. Handheld scanners are tested for reliable OBD port connection.
- Range and Cable Length: Measuring wireless range for Bluetooth scanners and cable length for handheld units.
- Live Data Monitoring: Running the vehicle and monitoring engine and vital systems data in real-time.
- Fault Code Generation and Reading: Simulating a fault by disconnecting the engine oil temperature sensor to assess the scanner’s ability to detect, report, and explain error codes.
- Fault Resolution and Code Clearing: After diagnosing the simulated fault, we rectify the issue, turn off the check engine light, and verify the scanner’s ability to clear the error code.
- On-Road Data Monitoring: Driving the vehicle to evaluate the scanner’s ability to display operational data such as engine speed, timing, and coolant temperature under real-world driving conditions. We assess data presentation in numerical, graphical, and gauge formats.
Our testing methodology focuses on real-world use and comprehensive feature evaluation to provide accurate and reliable recommendations for the best OBD car scanners.
Understanding fault codes is also crucial. All codes consist of four numbers preceded by a letter indicating the system (Powertrain (P), Body (B), Chassis (C), Undefined (U)). Generic codes (starting with ‘0’) apply across all makes, while manufacturer-specific codes (starting with ‘1’) are unique to specific carmakers, often indicating more detailed or specialized issues. For example, a P0098 code generally points to an intake air temperature sensor issue, while a Ford-specific P1112 code indicates an intermittent intake air temperature sensor reading requiring replacement. Our reviews consider how well each scanner interprets and explains these codes, empowering users with actionable diagnostic information.
