The Best Personal Obd2 Scanners are essential tools for any car owner wanting to understand their vehicle’s health. Connecting to your car’s onboard computer, these scanners unlock a wealth of information, from diagnosing a mysterious check engine light to predicting potential problems before they escalate. Instead of relying solely on expensive mechanics for diagnostics, a personal OBD2 scanner empowers you to take control and understand what’s happening under the hood of your car.
However, with a vast array of OBD2 scanners on the market, choosing the right one can be daunting, especially for beginners. We’ve rigorously tested numerous OBD2 scanners over the years to identify the top performers. This guide highlights the best personal OBD2 scanners available today, ensuring you find the perfect tool to suit your needs and budget. Further down, we’ll also delve into how OBD2 scanners function and decipher those cryptic error codes, giving you a comprehensive understanding.
Our top recommendation for an all-around excellent personal OBD2 scanner is the Innova 6100P. Its standout feature is its ability to not only diagnose current issues but also predict future problems, providing valuable insights into necessary repairs and parts. For those who prefer a wireless experience, the Topdon TopScan offers exceptional mobile functionality and diagnostic depth. Budget-conscious users will find the Launch CR529 an unbeatable value, delivering essential features at an affordable price.
Here’s a quick list of our recommended best personal OBD2 scanners to help you make an informed decision:
Tom Pritchard
Tom is the Tech Editor and has extensive experience reviewing consumer technology, including car tech and OBD-II scanners. He offers expert insights into the functionality and usability of personal OBD2 scanners.
The Quick List: Best Personal OBD2 Scanners
These are the top personal OBD2 scanners you can purchase now, based on our hands-on evaluations. Continue scrolling for detailed reviews of each scanner and to learn why they stand out.
Innova 6100P: Best Personal OBD2 Scanner Overall
- Innova 6100P: Best Overall
This scanner is designed to empower home mechanics with professional-level diagnostics. Beyond basic fault reading, it integrates with the Innova app to provide detailed problem descriptions, necessary parts, and estimated repair costs. Its predictive capabilities are a significant advantage, alerting you to potential future issues.
Read more below
Topdon TopScan: Best Mobile Personal OBD2 Scanner
2. Topdon TopScan: Best Mobile Scanner
The Topdon TopScan stands out for its effortless Bluetooth setup and a suite of features usually found in professional-grade scanners. Its compact design doesn’t compromise on functionality, offering diagnostics, repair guides, parts lists, and predictive analysis to anticipate upcoming problems, all accessible via your smartphone.
Read more below
Launch CR529: Best Budget Personal OBD2 Scanner
3. Launch CR529: Best Cheap Scanner
The Launch CR529 is a compact yet powerful OBD2 scanner that delivers essential diagnostic functions and even some advanced features typically absent in similarly priced competitors. Lifetime support and updates further enhance its value, making it an excellent choice for budget-conscious users.
Read more below
Topdon Phoenix Lite 2: Best Rugged Personal OBD2 Scanner
4. Topdon Phoenix Lite 2: Best Rugged Scanner
Resembling a robust handheld gaming console, the Topdon Phoenix Lite 2 is designed for both professionals and DIY enthusiasts who need a durable and powerful scanner. Its rugged build quality ensures it can withstand demanding environments while providing advanced diagnostic capabilities.
Read more below
Ancel BD310: Best Dual-Purpose Personal OBD2 Scanner
5. Ancel BD310: Best Dual-Purpose Scanner
The Ancel BD310 excels as a versatile OBD2 scanner, functioning both as a standard handheld device and as an auxiliary dashboard display when paired with a smartphone. Its compact design, smartphone integration, and affordable price make it a compelling option for everyday use.
Read More below
Carly OBD-II Scanner: Best Personal OBD2 Scanner with Companion App
6. Carly OBD-II Scanner: Best Scanner with a Companion App
The Carly OBD-II Scanner’s value is highly dependent on your car make, with VW, BMW, and Ford vehicles benefiting the most from its comprehensive features. Its standout feature is its exceptional companion app, offering extensive customization and professional-level diagnostic tests.
What are the best personal OBD2 scanners?
Why Trust Tom’s Guide? At Tom’s Guide, our team of expert reviewers dedicates countless hours to evaluating and comparing products to assist you in making the best choices for your needs. Learn more about our rigorous testing and review process.
Best Personal OBD2 Scanner Overall
Innova 6100P displaying menu options
(Image credit: Tom’s Guide)
1. Innova 6100P
Helps make driveway mechanics feel like a true professional
Our expert review:
Specifications
- Display/size: Color/2.8 inches
- Bluetooth/handheld: Yes/Yes
- I/M Readiness test: Yes
- Displays live data: Yes
- Number of keys: 9
- Warranty: 1 year
- Size: 7.2 x 3.4 x 1.1 inches
- Weight: 6.5 ounces
Reasons to buy
- Compact and easy to carry
- Resets battery test and oil lights
- Handheld and app-based diagnosis
- Offers repair instructions and parts needed
Reasons to avoid
- Interface only uses text
- Keys need a lot of pressure
During my evaluation of the Innova 6100P, its ability to make even novice users feel like seasoned professionals truly stood out. Regardless of your automotive expertise, the 6100P simplifies complex diagnostic tasks.
This is largely due to the 6100P’s efficiency and speed in performing various diagnostic jobs. The initial setup is slightly more involved than some other scanners tested, but it’s by no means difficult. The scanner activated instantly upon connecting to my car’s OBD port.
A key advantage of the Innova 6100P is its hybrid design, offering the flexibility to use either the dedicated handheld scanner or Innova’s companion app, catering to user preference. The app includes a remarkable predictive maintenance feature that anticipates potential component failures, enabling proactive repair planning.
This predictive capability alone justifies the $120 price. The inclusion of live data, fault code reading, pre-inspection I/M readiness checks, and a generous 72-inch data and power cable are significant added benefits.
Read our full Innova 6100P review.
Best Mobile Personal OBD2 Scanner
Topdon TopScan Bluetooth OBD2 scanner](https://www.tomsguide.com/vehicle-tech/topdon-topscan-review)
Editor’s Choice
(Image credit: Topdon)
2. Topdon TopScan
Perfect for digging deep into your car’s potential
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 year
- Size: 3.2 x 2.0 x 1.1 inches
- Weight: 2.6 ounces
Reasons to buy
- Excellent coverage of automotive diagnostics
- Live data
- Unique performance indicators
- Maintenance items covered
Reasons to avoid
- Transmitter is big and heavy
- Some features require subscription after a year
The Topdon TopScan may appear unassuming, but this compact scanner is packed with features that go beyond first impressions. This is more than just a standard Bluetooth OBD2 module that transmits data to your smartphone app. I was particularly impressed by its capabilities, which significantly exceed those of competitors in its class.
Beyond basic fault detection and I/M Readiness tests, the TopScan excels in performance and efficiency diagnostics. It can even estimate your vehicle’s horsepower and torque, features rarely found in OBD2 scanners at this price point.
Many OBD2 scanners costing ten times as much lack the performance testing features of the TopScan. Whether you aim to optimize your car’s performance or ensure its roadworthiness, the TopScan is an invaluable addition to your toolkit.
Read our full Topdon TopScan review
Best Cheap Personal OBD2 Scanner
Launch CR529 OBD-II scanner in operation](https://www.tomsguide.com/vehicle-tech/i-tested-this-obd-ii-scanner-and-its-a-steal-for-dollar38)
Bargain Hunter
(Image credit: Future)
3. Launch CR529
One of the best personal OBD2 scanners available for 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 years
- Size: 6.5 x 3.8 x 1.2 inches
- Weight: 11 ounces
Reasons to buy
- Inexpensive
- Lifetime updates
- Easy pre-inspection report
Reasons to avoid
- Lacks manufacturers specialty codes
- Feels heavy in hand
- 1-year warranty
The Launch CR529 arguably offers the best value among personal OBD2 scanners. Its affordable price of around $38 belies the extensive diagnostic features it provides. I was pleasantly surprised by the level of functionality available at such a low cost.
While compromises are expected at this price point, such as the absence of manufacturer-specific codes and a somewhat hefty feel, the CR529 still delivers essential capabilities. It offers live data, an instant inspection feature, and surprisingly detailed insights into your car’s systems. Furthermore, lifetime updates ensure long-term usability without subscription fees.
For users with professional automotive diagnostic needs, the CR529 might fall short. However, for the average car owner, it’s an excellent, budget-friendly tool to keep in your glove compartment.
Read our full Launch CR529 review
Best Pro-Level Personal OBD2 Scanner
Topdon Phoenix Lite 2 OBD2 scanner in a garage setting
(Image credit: Future)
4. Topdon Phoenix Lite 2
Blurring the line between amateur and professional diagnosis
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
- Near professional OBD scanner
- Hybrid handheld with Wi-Fi and Bluetooth
- 8-inch touch screen
- Excellent array of diagnostic tests and live data
- Includes adapters and hard case
Reasons to avoid
- Big, heavy and at times cumbersome
- Expensive
- After two years, it requires a subscription
The Topdon Phoenix Lite 2 is a significant investment compared to other personal OBD2 scanners, but it delivers exceptional value for the price. It’s ideally suited for both amateur car enthusiasts and professional mechanics seeking advanced diagnostic capabilities.
A standout feature of the Phoenix Lite 2 is its wireless operation. The control pad connects via Bluetooth to a receiver plugged into the car’s OBD port, offering unparalleled freedom of movement around the vehicle. While the scanner itself is substantial in size and weight, it includes a kickstand and robust construction designed to endure workshop conditions.
It provides advanced features like live data graphing, comprehensive fault information, and numerous sophisticated diagnostic functions typically absent in lower-priced scanners. Note that firmware updates are included for two years, after which a $495 annual subscription is required.
Read our full Topdon Phoenix 2 Lite review
Best Dual-Purpose Personal OBD2 Scanner
Close-up of the Ancel BD310 OBD2 scanner](https://www.tomsguide.com/reviews/ancel-bd310)
(Image credit: Tom’s Guide)
5. Ancel BD310
A handy personal OBD2 scanner that can perform 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
- Light and compact
- Works as scanner and secondary car display
- Offers handheld and Bluetooth scanning capabilities
Reasons to avoid
- Interface is too minimalist
- Screen is small
The Ancel BD310 is a versatile dual-function scanner, operating as both a standard handheld OBD2 scanner and a Bluetooth-connected device that can serve as a secondary in-car display. Its ability to show real-time engine data on your dashboard sets it apart.
Its compact and lightweight design makes the BD310 highly portable and easy to store in a glovebox. The 2-inch screen is admittedly small, and the four-button interface is somewhat basic, but these factors don’t hinder its diagnostic capabilities.
The 56-inch cable is conveniently long for under-hood work, and the BD310 effectively performs functions like I/M readiness tests and displays crucial performance metrics, including coolant temperature, engine timing, and RPM.
Read our full Ancel BD310 review.
Best Personal OBD2 Scanner with Companion App
The Carly OBD2 scanner device](https://www.tomsguide.com/vehicle-tech/carly-obd-scanner-review)
(Image credit: Carly)
6. Carly OBD-II Scanner
A solid scanner that’s only as good as the car you have
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
- Easy to use interface
- Customization options
- Live data display
- Maintenance and repairs covered
- Lifetime warranty and updates
Reasons to avoid
- Can’t do all tasks for all cars
- App can get expensive
The Carly OBD Scanner offers a wealth of features, with a standout companion app that significantly enhances its usability. Unlike many Bluetooth scanners with rudimentary apps, Carly provides one of the most feature-rich and user-friendly app experiences available.
The app not only diagnoses issues and clears fault codes but also offers repair assistance and a used car check feature to prevent purchasing problematic vehicles. The lifetime warranty is a rare and valuable benefit.
However, the functionality of the Carly scanner is not universal across all car models. Compatibility varies, so verifying your car’s compatibility before purchasing is crucial. Additionally, accessing advanced features beyond basic OBD functions requires an ongoing subscription, which can become costly over time.
Read our full Carly OBD scanner review
Other Personal OBD2 Scanners We’ve Tested
Innova CarScan Mobile 1000 connected to a car’s OBD2 port](https://www.tomsguide.com/reviews/innova-carscan-mobile-1000)
(Image credit: Tom’s Guide)
8. Innova CarScan Mobile 1000
Innovative diagnostic features in a compact design
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: 1 year
- Size: 2.0x 1.5 x 1.0 inches
- Weight: 0.9 ounces
Reasons to buy
- Easy to set up
- Small and compact
- Excellent companion app
- Can predict future problems and suggest repairs
- Works as a standalone automotive gauge
Reasons to avoid
- Relies on two separate apps
- Both apps feature ads
The Innova CarScan Mobile 1000 is among the most innovative Bluetooth personal OBD2 scanners we’ve tested. It’s not only incredibly easy to set up wirelessly but also incorporates many advanced features typically found in larger Innova scanners.
The CarScan Mobile 1000 offers a broad spectrum of diagnostic functions, including Innova’s predictive software for identifying potential issues preemptively. It also provides repair and parts suggestions, guiding you on what to discuss with your mechanic. Furthermore, it can transform your smartphone into a secondary dashboard gauge display.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 OBD2 scanner from Thinkcar
(Image credit: Tom’s Guide)
9. ThinkCar ThinkDiag TKD01
Dependable, but comes with an annual subscription
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: 1 year
- Size: 3.1 x 2.0 x 1.1 inches
- Weight: 2.7 ounces
Reasons to buy
- Capable of reading enhanced codes
- Lots of optional abilities on offer
- Includes hard carry case
Reasons to avoid
- $40 app subscription after 1 year
- Heavy
- Difficult installation
The ThinkCar ThinkDiag TKD01 is one of the larger Bluetooth OBD2 scanners available, which can pose installation challenges. Its size may necessitate an extension cable for connection in some vehicles. However, its robust build makes the oval-shaped module highly durable.
ThinkDiag’s app supports profiles for over 100 car manufacturers, making it excellent for accessing manufacturer-specific fault codes. It also displays extended fault codes and efficiently handles common issues like oil-change light resets and monitoring critical car systems. Like Innova scanners, it predicts potential future problems but lacks guidance on resolving them.
Be aware that full access requires a yearly subscription of at least $40 after the first year of free use.
Read our full ThinkCar ThinkDiag TKD01 review.
Autel AutoLink AL539 OBD2 scanner with multimeter probes](https://www.tomsguide.com/reviews/autel-autolink-al539)
(Image credit: Tom’s Guide)
10. Autel AutoLink AL539
Ideal for diagnosing electrical problems
Our expert review:
Specifications
- Display/size: Color/2.8 inches
- Bluetooth/Handheld: Yes/No
- I/M Readiness test: Yes
- Displays live data: Yes
- Number of keys: 8
- Warranty: 1 year
- Size: 6.7 x 3.6 x 1.4 inches
- Weight: 10.6 ounces
Reasons to buy
- Features electrics multimeter
- Offers battery testing
- Stand included
Reasons to avoid
- OBD and electric scanners don’t worj simultaneously
- Battery needs charging
The Autel AutoLink AL539 uniquely integrates a multimeter for diagnosing electrical system issues, such as wiring faults, shorts, alternator voltage, and fuse problems. A limitation is that the multimeter cannot be used while the AL539 is connected as an OBD2 scanner.
As an OBD2 scanner, the AL539 provides live data and performs comprehensive pre-inspection readiness tests. Faults are clearly indicated with color-coded lights (green, yellow, red for severity).
The design is user-friendly, featuring a compact and light frame, a pull-out stand for hands-free operation, and a 58-inch cable. The interface is intuitive, with icons for primary functions enhancing ease of use.
Read our full Autel AutoLink AL539 review.
Frequently Asked Questions
What is an OBD2 Scanner?
Mechanics use diagnostic scanners connected to your car’s OBD port to identify problems, rather than manually disassembling the engine. These OBD2 scanners access data from your car’s onboard computer.
Basic OBD2 scanners read and identify error codes flagged by your vehicle when an issue is detected. More advanced personal models monitor systems in real-time and can even predict future problems, making them invaluable for preventative maintenance.
What is the OBD2 Port?
The On-Board Diagnostics Version Two (OBD2) port is a standard interface in almost all passenger vehicles sold in the US since 1996, Canada since 1998, EU since 2004, and Australia, Mexico, and New Zealand since 2006.
This port allows connection to the car’s computer. Besides OBD2 scanners, devices like insurance black boxes and dash cams can also utilize this port.
If you’re unsure of the OBD2 port location, resources are available to find your car’s OBD2 port in North American vehicles and worldwide OBD2/EOBD port locations.
What is a DTC?
DTC stands for Diagnostic Trouble Code, an error code generated by a car’s OBD system upon detecting an issue. These codes are read by OBD2 scanners, enabling users to diagnose vehicle problems. While many DTCs are standardized across vehicle makes and models, some manufacturers use proprietary DTCs specific to their vehicles.
What do DTCs actually mean?
DTCs may appear as random alphanumeric strings, but they follow a logical structure that indicates the type and location of the problem.
The first character indicates the affected system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character, a number, specifies whether it’s a generic (0) or manufacturer-specific (1) code.
The third character pinpoints the specific subsystem:
- 1: Fuel and air metering
- 2: Injector circuit fuel and air metering
- 3: Ignition system or misfire
- 4: Auxiliary emissions controls
- 5: Vehicle 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 further specify the fault, ranging from 0 to 99.
OBD2 scanners decode these error codes, providing descriptions. Advanced models offer more detailed information. Additional research on Google may be needed, as there are over 5,000 potential DTCs.
Not all DTCs signal critical issues; some may indicate minor problems like slightly elevated engine temperature.
How to Choose the Best Personal OBD2 Scanner for You
For insights into your vehicle’s operation and potential issues, a personal OBD2 scanner is invaluable.
It’s the same technology used by dealerships and repair shops. Having this information empowers you. Personal OBD2 scanners come in two main types:
Handheld OBD2 scanners include a screen and cable for direct connection to your car’s OBD port. Wireless OBD2 scanners connect via Bluetooth to a smartphone or tablet for display.
High-quality personal OBD2 scanners are available for under $200, with some priced below $30. Key considerations for selecting the best personal OBD2 scanner include:
- Easy Setup: Quick and straightforward setup ensures you’ll use the scanner promptly when needed.
- Faults and Explanations: Effective scanners not only identify faults but also explain their meaning, aiding in DIY repairs or mechanic communication.
- I/M Readiness Check: Ensures your vehicle will pass emissions inspections by checking critical engine and emissions systems.
- Accuracy: Reliable results are crucial; inaccurate information is detrimental.
- Size and Weight: Portability is important for on-the-go diagnostics.
- Live Data: Real-time monitoring of engine parameters helps diagnose intermittent issues.
- Graphs: Visual data representation enhances data interpretation, especially for comparisons.
- Warranty: Opt for scanners with extended warranties, ideally lifetime, for long-term reliability.
Choosing between handheld and wireless scanners depends on personal preference. Consider screen size for handheld units—larger, brighter, icon-based displays are preferable. For ruggedness, look for models with protective bumpers.
Additional features to consider include electrical multimeter functionality, manufacturer-specific code reading, and PDF export capabilities.
The affordability of personal OBD2 scanners, often under $100, makes them a cost-effective alternative to professional diagnostic services.
How We Test Personal OBD2 Scanners
To evaluate personal OBD2 scanners, I used a 2014 Audi A4 Allroad over several weeks, both in the garage and on the road. Each scanner was connected to the car’s OBD2 port to verify VIN reporting.
Wireless scanners were paired with an Apple iPad Pro, Microsoft Surface, or Samsung Galaxy S9+ via Bluetooth or Wi-Fi. Handheld scanners were tested by direct OBD2 port connection, drawing power from the port.
Cable lengths of handheld scanners and wireless ranges were measured. With the engine running, engine and vital systems were monitored, and the oil temperature sensor was intentionally disconnected to induce a fault.
The scanners’ fault reporting details were assessed. Afterward, the sensor was reconnected, the check engine light was cleared, and error codes were erased.
Road tests were conducted to assess live data display, including engine speed, timing, and coolant temperature, noting data presentation as numbers, graphs, or gauges.
Understanding fault codes is essential. All codes consist of four numbers and a letter prefix (P, B, C, or U). Approximately 5,000 diagnostic codes exist, some generic (starting with 0), applicable across all cars, and others manufacturer-specific (starting with 1), indicating unique hardware or detailed problem analysis.
For example, P0098 typically indicates an issue with the intake air temperature sensor. Conversely, a Ford-specific P1112 code suggests intermittent intake air temperature sensor readings, requiring sensor replacement.
More from Tom’s Guide
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- [Link to related article 2]
