The best OBD-II scanners are essential tools for modern car owners and mechanics alike, offering a window into your vehicle’s onboard computer to decipher everything from minor glitches to major malfunctions. Understanding your car’s health has never been more accessible, and with the right scanner, you can diagnose issues yourself, potentially saving significant repair costs and time spent at the shop. However, for truly comprehensive diagnostics, you need more than just a basic code reader; you need the best OBD II all systems code scanner.
Not all OBD-II scanners offer the same level of insight. While entry-level devices might only read basic engine codes, a superior all systems code scanner can delve into every module of your vehicle, from the engine and transmission to the ABS, airbags, and beyond. This deeper level of access is crucial for accurate and complete vehicle diagnostics. We’ve rigorously tested a range of OBD-II scanners to identify those that truly stand out, particularly when it comes to providing all systems coverage. Below, we highlight our top recommendations, ensuring you find the perfect tool to unlock your car’s hidden secrets. Keep reading to discover how these scanners work and why having all systems access is a game-changer for vehicle maintenance.
Here are our top picks for the best OBD-II all systems code scanners you can purchase right now.
Tom Pritchard
Tom is the Tom’s Guide UK Phones Editor, with expertise ranging from the latest smartphones to essential car tech. His passion for automobiles, especially electric vehicles, drives his insightful evaluations of automotive diagnostic tools.
The Quick List
These are the best OBD-II all systems code scanners available today, based on our hands-on evaluations. Continue scrolling for detailed reviews of each scanner and explanations of their standout features.
Topdon TopScan: Best Mobile All Systems Scanner
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Topdon TopScan
This Bluetooth scanner excels in user-friendliness and comprehensive all systems diagnostics. Its compact design is packed with features, including detailed repair guidance, parts information, and predictive analysis to anticipate potential problems.
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Launch CR529: Best Budget-Friendly All Systems Option
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Launch CR529
Offering exceptional value, the Launch CR529 provides robust all systems scanning capabilities at an affordable price. It includes advanced features typically found in more expensive scanners, along with lifetime support and updates, making it a smart investment for budget-conscious users.
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Topdon Phoenix Lite 2: Best Professional-Grade All Systems Scanner
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Topdon Phoenix Lite 2
The Topdon Phoenix Lite 2 delivers a near-professional diagnostic experience with comprehensive all systems scanning. Its rugged design and tablet interface make it suitable for both professionals and serious DIYers seeking advanced diagnostic power.
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Ancel BD310: Best Dual-Purpose All Systems Scanner
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Ancel BD310
The Ancel BD310 is a versatile all systems code scanner that doubles as a supplementary dashboard display. Beyond comprehensive diagnostics, it offers real-time engine data monitoring and smartphone connectivity, all at a reasonable price.
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Carly OBD-II Scanner: Best All Systems Scanner with Companion App
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Carly OBD-II Scanner
The Carly OBD-II Scanner, paired with its exceptional companion app, provides in-depth all systems diagnostics, especially for brands like VW, BMW, and Ford. Its customization and professional-grade testing capabilities make it a top choice for users wanting app-enhanced functionality.
What are the best OBD-II All Systems Code Scanners?
Why Trust Tom’s Guide? Our team rigorously evaluates products to bring you unbiased and thorough recommendations. Learn more about our testing methodology.
Best Mobile OBD-II All Systems Code Scanner
(Image credit: Topdon)
1. Topdon TopScan
The Topdon TopScan is engineered for comprehensive vehicle analysis, providing extensive all systems diagnostic coverage that goes beyond basic code reading.
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
- Exceptional all systems automotive diagnostics
- Real-time live data display
- Unique vehicle performance indicators
- Broad maintenance coverage
Reasons to avoid
- Larger transmitter size
- Advanced features may require subscription renewal
The Topdon TopScan may appear unassuming, but this compact scanner delivers far more than meets the eye. It’s not just another Bluetooth OBD-II module; it’s a powerful all systems code scanner that significantly surpasses competitors in its class. Beyond standard fault detection and I/M Readiness tests, the TopScan excels in evaluating vehicle performance and efficiency. Remarkably, it can even estimate your car’s horsepower and torque, features often absent in scanners costing ten times as much. Whether you aim to optimize your vehicle’s performance or ensure its roadworthiness, the Topdon TopScan is an invaluable tool for in-depth all systems analysis.
Read our comprehensive Topdon TopScan review
Best Budget OBD-II All Systems Code Scanner
(Image credit: Future)
2. Launch CR529
The Launch CR529 is a top contender for those seeking all systems scanning capabilities without breaking the bank, delivering impressive functionality at an unbeatable price.
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
- Highly affordable
- Lifetime software updates included
- Simple pre-inspection reporting
- Delivers all systems diagnostic access at this price point
Reasons to avoid
- Limited manufacturer-specific codes
- Feels somewhat heavy
- Shorter 1-year warranty
The Launch CR529 redefines value in OBD-II scanners, offering extensive all systems diagnostics at an incredibly low price point. For around $40, it provides a level of diagnostic features that far exceeds expectations. While there are compromises, such as the absence of manufacturer-specific codes and a slightly bulky feel, it still delivers essential features like live data, instant vehicle inspection reports, and a surprisingly thorough view into your car’s internal systems, including all systems diagnostics. The inclusion of lifetime updates further enhances its value, ensuring long-term usability without subscription fees. While professional mechanics might need more specialized tools, the CR529 is an excellent all systems code scanner for the average car owner seeking comprehensive yet affordable diagnostics.
Explore our full Launch CR529 review
Best Pro-Level OBD-II All Systems Code Scanner
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(Image credit: Future)](https://target.georiot.com/Proxy.ashx?tsid=45724&GR_URL=https%3A%2F%2Famazon.com%2Fdp%2FB085TG89H4%3Ftag%3Dhawk-future-20%26ascsubtag%3Dtomsguide-us-6624740130487362149-20)
3. Topdon Phoenix Lite 2
The Topdon Phoenix Lite 2 bridges the gap between consumer and professional diagnostics, offering advanced all systems scanning in a user-friendly package.
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 all systems OBD scanner
- Wireless handheld with Wi-Fi and Bluetooth
- Large 8-inch touchscreen display
- Extensive diagnostic tests and live data options
- Includes adapters and protective hard case
Reasons to avoid
- Bulky and heavy design
- Higher price point
- Subscription required after two years for updates
The Topdon Phoenix Lite 2 represents a significant investment, positioning itself above many other OBD-II scanners, but it justifies its price with a wealth of features. It’s designed to cater to both amateur diagnosticians and professional mechanics seeking in-depth all systems analysis. A standout feature is its wireless operation; the control pad connects via Bluetooth to a receiver in your car’s OBD port, allowing for greater mobility around the vehicle during diagnostics. While the scanner itself is substantial in size and weight, it includes a kickstand and robust construction to withstand demanding workshop environments. It also offers advanced capabilities like live data graphing and comprehensive fault information, features often lacking in lower-priced scanners. The Phoenix Lite 2 provides near-professional level all systems diagnostics but consider the subscription cost for updates after the initial two years.
Read our detailed Topdon Phoenix 2 Lite review
Best Dual-Purpose OBD-II All Systems Code Scanner
Ancel BD310 (Image credit: Tom’s Guide)
4. Ancel BD310
The Ancel BD310 is a practical OBD-II scanner that serves a dual purpose, offering both diagnostic scanning and supplementary vehicle data display, making it a versatile all systems code scanner.
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 car display
- Offers handheld and Bluetooth scanning options
- Provides all systems diagnostic access in a compact form factor
Reasons to avoid
- Minimalist interface design
- Small screen size
The Ancel BD310 distinguishes itself as a dual-function scanner, operating as a standard handheld device and connecting to smartphones via Bluetooth. Uniquely, it can also function as a secondary display, showing essential engine metrics within the car cabin. Its compact and lightweight design makes it exceptionally portable and easy to store in a glovebox. While the 2-inch screen is somewhat small, and the four-button interface is slightly basic, it remains user-friendly for car diagnostics, including all systems checks. The 56-inch cable offers ample reach for under-hood work, and the BD310 capably performs tasks like I/M readiness tests and displays performance data, including coolant temperature, engine timing, and speed. The Ancel BD310 is a convenient and effective all systems code scanner for everyday use.
Explore our full Ancel BD310 review.
Best Companion App All Systems Code Scanner
(Image credit: Carly)
5. Carly OBD-II Scanner
The Carly OBD Scanner excels with its sophisticated companion app, offering deep all systems diagnostics that are particularly beneficial 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
- Intuitive and user-friendly app interface
- Extensive customization options
- Live data display through the app
- Maintenance and repair guides included
- Lifetime warranty and updates for the scanner hardware
- Comprehensive all systems access, especially for supported brands
Reasons to avoid
- Feature availability varies by car model
- App subscription can be costly for full functionality
The Carly OBD Scanner stands out due to its exceptional companion app, which significantly enhances its diagnostic capabilities. Unlike many Bluetooth scanners with basic apps, Carly offers one of the most feature-rich and user-friendly app experiences available. It not only diagnoses issues and clears fault codes but also provides repair assistance and tools to assess used vehicles for potential problems. The lifetime warranty on the scanner itself is a notable advantage. However, the effectiveness of Carly’s all systems diagnostic features is heavily dependent on vehicle compatibility, with brands like VW, BMW, and Ford benefiting the most. While the app is outstanding, accessing advanced features beyond basic OBD functions requires an ongoing subscription, which can add to the overall cost. For users with compatible vehicles seeking app-driven all systems diagnostics, Carly is a compelling choice.
Read our full Carly OBD scanner review
Other OBD-II Scanners We’ve Tested
Innova CarScan Mobile 1000 review Innova CarScan Mobile 1000 (★★★★☆)
The Innova CarScan Mobile 1000 is a highly innovative Bluetooth OBD-II scanner that offers predictive diagnostics and user-friendly operation. Its wireless design and simple setup process make it an appealing Bluetooth-only option for all systems checks via your smartphone.
Read the full Innova CarScan Mobile 1000 review
ThinkCar ThinkDiag TKD01 (★★★★☆)
The ThinkCar ThinkDiag TKD01, while larger than typical Bluetooth OBD-II scanners, is exceptionally durable and offers extensive manufacturer-specific error codes. It also features advanced fault code interpretation that can resolve minor issues without professional intervention. It’s a capable all systems code scanner, though 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, enhanced by an integrated multimeter. It excels at identifying electrical faults like damaged wiring, shorts, and blown fuses. It also provides a wide array of live data and pre-inspection readiness checks, making it a solid choice for electrical system diagnostics and general all systems checks.
Read our full Autel AutoLink AL539 review
Frequently Asked Questions
What is an OBD-II Scanner?
Mechanics use diagnostic scanners plugged into your car’s OBD port to understand vehicle problems, rather than manual inspection alone. These OBD-II scanners, particularly all systems code scanners, access your car’s onboard computer to read error codes and monitor real-time data. Advanced models can even predict future issues through comprehensive all systems analysis.
What is the OBD-II Port?
The OBD-II (On-Board Diagnostics Version Two) port has been a standard feature in vehicles across major markets since the late 1990s and early 2000s. This port allows devices like OBD-II scanners, including all systems code scanners, to interface with the vehicle’s computer. It’s also used for other devices like insurance trackers and dashcams. Find your OBD-II port location in North American cars or worldwide.
What is a DTC?
DTC stands for Diagnostic Trouble Code. These are error codes generated by your car’s OBD system when it detects a problem. OBD-II scanners, especially all systems models, read these codes to help users diagnose vehicle issues. While many DTCs are standardized across vehicles, some manufacturers use proprietary codes.
What do DTCs Actually Mean?
DTCs may seem like random characters, but they follow a logical structure to indicate the type and location of a problem. The first letter identifies the affected system: Powertrain (P), Body (B), Chassis (C), or Network (N). The second character is a number: 0 for generic codes and 1 for manufacturer-specific codes. The third character specifies the subsystem involved, such as fuel/air metering (1), ignition system (3), or transmission (7-9). The last two characters pinpoint the exact fault, ranging from 00 to 99. All systems code scanners interpret these codes, often providing detailed descriptions. While over 5,000 DTCs exist, not all indicate critical problems; some may simply warn of minor issues like slightly elevated engine temperature.
How to Choose the Best OBD-II All Systems Code Scanner for You
For detailed insights into your vehicle’s operation and potential problems across all systems, an OBD-II scanner is indispensable. These tools provide access to the same diagnostic information used by professional mechanics. OBD-II scanners come in two main types: handheld units with integrated screens and wireless scanners that connect to smartphones or tablets via Bluetooth. When choosing an all systems code scanner, consider these key factors:
- Easy Setup: A scanner should be quick and straightforward to set up for prompt diagnostics.
- Fault Code Explanation: The best scanners not only display fault codes but also explain their meanings, aiding in DIY repairs or informed discussions with mechanics regarding all systems issues.
- I/M Readiness Check: Ensure the scanner performs essential emissions and engine tests for state inspections.
- Accuracy: Reliable and accurate results are crucial for effective diagnostics across all systems.
- Size and Weight: Portability is important for convenient use and storage in your vehicle.
- Live Data: Real-time data monitoring helps in diagnosing intermittent problems across various systems.
- Graphs: Visual data representation enhances analysis, especially for comparative diagnostics.
- Warranty: Opt for scanners with extended or lifetime warranties for long-term reliability.
Choosing between handheld and wireless scanners depends on personal preference. For comprehensive diagnostics, especially all systems scanning, consider features like lifetime software updates, screen size and clarity for handheld devices, and ruggedness for durability. Additional features like electrical multimeters, manufacturer-specific code reading, and PDF report export can also be beneficial. The cost of advanced all systems code scanners is reasonable, often less than an hour of professional mechanic labor, making them a cost-effective investment.
How We Test OBD-II Scanners
We rigorously test OBD-II scanners to ensure they meet our standards for performance and reliability in all systems diagnostics. Our testing process involves:
- VIN Verification: Confirming the scanner correctly reads the vehicle identification number (VIN).
- Connectivity Testing: Evaluating Bluetooth and Wi-Fi connections for wireless scanners with devices like iPads, Microsoft Surfaces, and Samsung Galaxy phones. Handheld scanners are tested for direct OBD-II port functionality.
- Range and Cord Length Measurement: Assessing wireless range for Bluetooth scanners and cable length for handheld units.
- Live Data Monitoring: Observing real-time engine and system data during vehicle operation, including all systems data where applicable.
- Fault Code Testing: Simulating a vehicle fault by disconnecting the engine oil temperature sensor to evaluate fault code detection and reporting accuracy across all systems.
- Post-Repair Verification: Checking the scanner’s ability to clear fault codes and confirm issue resolution.
- Road Testing: Assessing the scanner’s performance under driving conditions, monitoring parameters like engine speed, timing, and coolant temperature, and evaluating data presentation (numeric, graphs, gauges).
Our detailed testing ensures that our top picks for The Best Obd Ii All Systems Code Scanners provide accurate, reliable, and comprehensive diagnostic capabilities.
