The Best Consumer Obd2 Scanner is an invaluable tool for modern car owners. These devices tap into your vehicle’s onboard computer, unlocking a wealth of information about its health and performance. Whether you’ve got a mysterious check engine light or just want to understand your car better, an OBD2 scanner lets you diagnose issues like a pro, often saving you money on expensive mechanic visits.
Navigating the world of OBD2 scanners can be daunting, especially for beginners. There’s a huge range of options available, each with different features and price points. Luckily, we’ve rigorously tested a variety of OBD2 scanners to bring you a curated list of the best consumer models on the market. We’ve assessed everything from ease of use to the depth of diagnostic capabilities, so you can find the perfect scanner for your needs and budget. Keep reading to explore our top recommendations and learn more about how OBD2 scanners work and what those cryptic error codes actually mean.
Our top picks include versatile tools like the Topdon TopScan, a wireless wonder packed with professional-grade features. For budget-conscious users, the Launch CR529 offers incredible value without sacrificing essential functionality. And if you’re seeking a truly professional-level experience, the Topdon Phoenix Lite 2 delivers advanced diagnostics, though it comes with a higher price tag.
Here are our top recommendations for the best consumer OBD2 scanners available today.
Tom Pritchard
Tom is the UK Phones Editor at Tom’s Guide, covering the latest in mobile tech and apps. He’s also a passionate advocate for electric vehicles and a dedicated car enthusiast.
The Quick List: Top Consumer OBD2 Scanners
Based on our hands-on testing, here are the best OBD2 scanners you can buy right now. Scroll down for detailed reviews of each product and to learn why they earned a spot on our list.
1. Topdon TopScan: Best Mobile Scanner
This Bluetooth scanner is incredibly user-friendly and packed with professional-level features in a compact design. It offers comprehensive diagnostics, repair guidance, parts information, and even predictive analysis to anticipate potential issues.
Read more below
2. Launch CR529: Best Cheap Scanner
The Launch CR529 is a small yet powerful OBD2 scanner that provides all the essential features you need, plus some advanced capabilities rarely found in similarly priced models. Lifetime support and updates make it an exceptional value.
Read more below
3. Topdon Phoenix Lite 2: Best Rugged Scanner
The Topdon Phoenix Lite 2 boasts a robust, horizontal design reminiscent of a handheld gaming console, making it ideal for both professionals and DIY enthusiasts. It’s a powerful, durable scanner built to withstand demanding environments.
Read more below
4. Ancel BD310: Best Dual-Purpose Scanner
Beyond its OBD2 scanning capabilities, the Ancel BD310 can also function as an auxiliary dashboard display, showing real-time engine specs. It features a user-friendly design, smartphone compatibility, and an attractive price.
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5. Carly OBD-II Scanner: Best Scanner with a Companion App
The Carly OBD2 Scanner’s value is heavily dependent on your car make, with optimal performance for VW, BMW, and Ford. Its standout feature is its exceptional companion app, offering extensive customization and professional-grade diagnostic tests.
What Makes These the Best Consumer OBD2 Scanners?
Why Trust Tom’s Guide? Our team of expert reviewers dedicates countless hours to evaluating products and services to help you make informed purchasing decisions. Learn more about our rigorous testing and review process.
Best Mobile OBD-II Scanner
(Image credit: Topdon)
1. Topdon TopScan
Perfect for Deep-Dive Car Diagnostics
Our Expert Review:
Specifications:
- Display/Size: None
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: Yes
- Displays Live Data: Yes
- Number of Keys: None
- Warranty: 2 years
- Size: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to Buy:
- Excellent automotive diagnostic coverage
- Real-time live data display
- Unique performance indicators
- Comprehensive maintenance features
Reasons to Avoid:
- Relatively large and heavy transmitter
- Some advanced features require a subscription after the first year
The Topdon TopScan might look unassuming at first glance, but this compact scanner packs a powerful punch. It’s more than just a basic Bluetooth OBD2 module that relays information to your smartphone app. We were impressed by its advanced capabilities that surpass many competing scanners in its class.
Beyond simply identifying fault codes and performing I/M Readiness tests, the TopScan goes further by assessing vehicle performance and efficiency. It can even estimate your car’s horsepower and torque – features often absent in OBD2 scanners costing ten times as much. Whether you’re aiming to optimize your car’s performance or ensure its roadworthiness, the TopScan is an exceptional tool to have in your garage.
Read our full Topdon TopScan review
Best Cheap OBD-II Scanner
(Image credit: Future)
2. Launch CR529
Top OBD2 Scanner Under $50
Our Expert Review:
Specifications:
- Display/Size: Color/ 2.8-inches
- Bluetooth/Handheld: No/Yes
- I/M Readiness Test: Yes
- Displays Live Data: Yes
- Number of Keys: 8
- Warranty: 1 year
- Size: 6.5 x 3.8 x 1.2 inches
- Weight: 11 ounces
Reasons to Buy:
- Very affordable
- Lifetime free updates
- Easy pre-inspection report generation
Reasons to Avoid:
- Lacks manufacturer-specific codes
- Feels somewhat heavy
- Limited 1-year warranty
In our opinion, the Launch CR529 stands out as the best value consumer OBD2 scanner on the market. Its impressive diagnostic capabilities, especially considering its budget-friendly price tag (around $40), are truly remarkable. We were surprised by the level of features offered at such a low cost.
While compromises are expected at this price point, such as the absence of manufacturer-specific codes and a slightly hefty feel, the CR529 still delivers essential features like live data, instant inspection reports, and a surprisingly detailed look into your car’s internal systems. The inclusion of lifetime updates ensures long-term usability without subscription fees.
While the CR529 might not cater to professional mechanics, it’s an excellent choice for the average car owner who wants a reliable and affordable OBD2 scanner for DIY diagnostics.
Read our full Launch CR529 review
Best Pro-Level OBD-II Scanner
(Image credit: Future)
3. Topdon Phoenix Lite 2
Bridging the Gap Between DIY and Professional Diagnostics
Our Expert Review:
Specifications:
- Display/Size: Color/8-inch
- Bluetooth/Handheld: Yes/Yes
- I/M Readiness Test: Yes
- Displays Live Data: Yes
- Number of Keys: Touchscreen
- Warranty: 2 years
- Size: 10.2 x 7.2 x 1.7 inches
- Weight: 2.6 pounds
Reasons to Buy:
- Professional-grade OBD scanner capabilities
- Versatile handheld with Wi-Fi and Bluetooth
- Large 8-inch touchscreen display
- Extensive suite of diagnostic tests and live data options
- Includes adapters and a protective hard case
Reasons to Avoid:
- Bulky, heavy, and can be cumbersome to handle
- High price point
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 is a significant investment, costing more than many other capable OBD2 scanners. However, it offers a wealth of features that justify the price, delivering exceptional value for both serious DIYers and professional mechanics.
A standout feature is its wireless operation; the control pad connects via Bluetooth to a receiver plugged into your car’s OBD port, providing unmatched freedom of movement around the vehicle. While the scanner itself is substantial in size and weight, it includes a kickstand and rugged construction designed to withstand workshop conditions.
The Phoenix Lite 2 boasts advanced features typically found in professional diagnostic tools, including live data graphing, detailed fault code information, and much more. Keep in mind that firmware updates are included for two years, after which an annual subscription of $495 is required.
Read our full Topdon Phoenix 2 Lite review
Best Dual-Purpose OBD-II Scanner
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
A Versatile OBD2 Scanner That Does Double Duty
Our Expert Review:
Specifications:
- Display/Size: Color/2 inches
- Bluetooth/Handheld: Yes/Yes
- I/M Readiness Test: Yes
- Displays Live Data: 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
Reasons to Avoid:
- Minimalist interface
- Small screen size
The Ancel BD310 is a versatile OBD2 scanner that operates as a standard handheld device and connects to smartphones via Bluetooth. Its unique ability to function as a secondary display, showing essential engine data within the car cabin, sets it apart.
We found the BD310 remarkably convenient due to its small size and light weight, easily storable in a glovebox. While the 2-inch display is compact and the four-key interface can feel a bit awkward, these factors don’t significantly hinder its diagnostic capabilities.
The 56-inch cable offers ample reach while working under the hood. The BD310 performs essential functions like I/M inspection readiness tests and provides performance data including coolant temperature, engine timing, and RPM.
Read our full Ancel BD310 review.
Best Companion App OBD-II Scanner
(Image credit: Carly)
5. Carly OBD-II Scanner
A Capable Scanner, Best Suited for Specific Car Brands
Our Expert Review:
Specifications:
- Display/Size: No
- Bluetooth/Handheld: Yes/No
- I/M Readiness Test: No
- Displays Live Data: Yes
- Number of Keys: None
- Warranty: Lifetime
- Size: 2.9 x 1.5 x 0.7 inches
- Weight: 0.7 ounces
Reasons to Buy:
- User-friendly interface
- Customization options within the app
- Live data display
- Covers maintenance and repair information
- Lifetime warranty and updates
Reasons to Avoid:
- Feature availability varies by car model
- App subscription can be expensive
The Carly OBD Scanner offers a compelling set of features, and its companion app truly impressed us with its quality. While many Bluetooth scanners have basic apps, Carly’s app is exceptional.
It not only diagnoses issues and clears fault codes but also provides repair assistance and car history checks to avoid purchasing problematic used vehicles. The lifetime warranty is a significant bonus, offering long-term peace of mind.
However, the Carly scanner’s functionality is car-dependent; feature availability varies across makes and models. It’s crucial to verify compatibility with your specific car before purchasing. Additionally, accessing advanced features beyond basic OBD functions requires an ongoing subscription, which can add to the overall cost.
Read our full Carly OBD scanner review
Other OBD-II Scanners We’ve Tested
Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a standout Bluetooth OBD2 scanner, incorporating Innova’s renowned features like predictive diagnostics in a wireless format. Its exceptionally easy setup process makes it a highly appealing Bluetooth-only option.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 (★★★★☆)
While larger than typical Bluetooth OBD2 scanners, the ThinkDiag TKD01’s robust build makes it practically indestructible. It offers extensive manufacturer-specific error codes and advanced fault code analysis that can resolve minor issues without mechanic intervention. A $40 annual subscription is required after the first year.
Read our full ThinkCar ThinkDiag TKD01 review.
Autel AutoLink AL539 (★★★☆☆)
The Autel AutoLink AL539 OBD2 scanner is specifically designed for electrical diagnostics, featuring a built-in multimeter for identifying issues like damaged wiring, short circuits, and blown fuses. It also provides a wide range of live data and pre-inspection readiness checks.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions About Consumer OBD2 Scanners
What is an OBD-II Scanner?
Mechanics use diagnostic scanners plugged into your car’s OBD port to understand car problems, not manual disassembly. These OBD2 scanners access your car’s onboard computer information.
Basic OBD2 scanners read and identify car error codes, indicating detected issues. Advanced models monitor systems in real-time and predict potential problems. They are essential consumer tools for car maintenance and understanding vehicle health.
What is the OBD-II Port?
The On-Board Diagnostics Version Two (OBD-II) port is standard in most passenger vehicles sold in the US since 1996, Canada since 1998, EU since 2004, and Australia, Mexico, and New Zealand since 2006.
This port is your interface to the car’s computer. OBD2 scanners, insurance black boxes, and dash cams connect here.
If you need help locating it, here’s how to find your car’s OBD-II port in North American vehicles. For worldwide locations, see how to find your OBD-II/EOBD port worldwide.
What is a DTC?
DTC stands for Diagnostic Trouble Code, the error code generated by a car’s OBD system when it detects a problem. OBD2 scanners read these codes to help users understand car issues. Standardized DTC codes are common across car brands, but some manufacturers use unique DTCs for their vehicles. Understanding DTCs is crucial for effective car diagnostics with consumer OBD2 scanners.
What do DTCs Actually Mean?
DTCs may seem like random characters, but they follow a logical structure indicating the type and location of the car problem.
The first letter indicates the affected system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character, a number, shows if it’s a generic code (0) or manufacturer-specific code (1).
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: Speed and idle control systems
- 6: Computer auxiliary outputs
- 7, 8, 9: Transmission and gearbox faults
- A, B, C: Hybrid propulsion faults
The fourth and fifth characters pinpoint the exact fault within the subsystem, ranging from 0 to 99.
OBD2 scanners interpret these codes, providing descriptions. Advanced models offer more detailed information. Further research may be needed using Google, as there are over 5,000 possible DTC errors.
Not all DTCs signal critical problems; some may indicate minor issues like slightly high engine temperature. Consumer OBD2 scanners help decipher these codes for better car maintenance.
How to Choose the Best Consumer OBD2 Scanner for You
If you want to understand your car’s operation or diagnose issues, using one of the best consumer OBD2 scanners is the most effective method.
It’s the same technology dealerships and repair shops use. You can access the same information affordably. Consumer OBD2 scanners come in two main types:
Handheld OBD2 scanners: These have a built-in screen and connect via cable to the OBD port. Wireless OBD2 scanners: These plug into the OBD port and connect to smartphones or tablets via Bluetooth to display data.
Both types offer high-performance options under $200, with some under $30. The best consumer OBD2 scanners balance size, weight, and capability to read fault codes and live data. Key criteria include:
- Easy Setup: Quick setup is essential for prompt diagnostics.
- Faults and Explanations: Scanners should explain fault codes for DIY repairs or mechanic communication.
- I/M Readiness Check: Essential for emissions test readiness assessment.
- Accuracy: Reliable results are crucial for correct diagnosis.
- Size and Weight: Compact and portable scanners are more practical for on-the-go use.
- Live Data: Helps identify intermittent issues by monitoring real-time parameters.
- Graphs: Visual data representation enhances analysis.
- Warranty: Long-term warranty ensures device longevity.
Choosing the best consumer OBD2 scanner depends on your needs. Decide between Bluetooth wireless or handheld units.
Consider longevity and look for lifetime warranties or software updates to keep pace with automotive technology.
For handheld scanners, prioritize screen size and clarity for easy reading. Rugged models with shock-absorbing bumpers are better for durability.
Extra features like multimeters, manufacturer-specific code reading, and PDF export capabilities can be beneficial.
Consumer OBD2 scanners offer professional-level diagnostics for under $100, a cost-effective alternative to mechanic diagnostic fees.
How We Test OBD-II Scanners
To evaluate consumer OBD2 scanners, we used a 2014 Audi A4 Allroad over several weeks in various driving conditions. Each scanner was connected to the car’s OBD-II port to verify VIN reporting.
For wireless scanners, connections were tested with an Apple iPad Pro, Microsoft Surface, and Samsung Galaxy S9+ via Bluetooth or Wi-Fi. Handheld scanners were tested by direct OBD-II port connection, drawing power from the port.
Cord length (for handhelds) and wireless range were measured. With the engine running, engine and system data were monitored. The oil temperature sensor was then disconnected to induce a fault.
Scanner details, fault code clearing, and check engine light reset were assessed. Road tests verified live data display like engine speed, timing, and coolant temperature, noting data presentation as numbers, graphs, or gauges.
Understanding fault codes is key to using OBD2 scanners. Codes have five characters: a letter prefix and four numbers.
Prefixes include: Powertrain (P), Body (B), Chassis (C), and Undefined (U).
Of about 5,000 fault codes, generic codes (starting with 0) apply universally, like air temperature sensor codes. Manufacturer-specific codes (starting with 1) are unique to carmakers, indicating specific hardware or detailed problem analysis.
For example, P0098 indicates an intake air temperature sensor issue. A Ford-specific P1112 code means the intake air temperature sensor is intermittently reporting values and needs replacement. Consumer OBD2 scanners help interpret these codes effectively.
