Shopping for the best obd2 scanner under $400? This list focuses on reliable, user-friendly OBD2 scanners that balance features and price. Below you’ll find compact reviews, real customer feedback, and clear buying advice to help you pick the right tool for DIY diagnostics or light shop work.
Quick Product Comparison
Our Top 10 Best Obd2 Scanner Under $400 Reviews – Expert Tested & Recommended
1. XTOOL D5S OBD2 Scanner Code Reader for Cars and Trucks with 16 Resets Crank Relearn CAN FD
The XTOOL D5S is a full-featured scanner that feels solid in hand. It covers OBD2 checks and adds 16 resets and crank relearn for more advanced work.
Key Features That Stand Out
✓ 16 service resets including crank relearn and maintenance resets
✓ Full OBD2 diagnostics with CAN FD support
✓ Clear touchscreen display with responsive controls
✓ Durable build suited for regular garage use
Why We Recommend It
This unit hits the sweet spot for DIYers who want more than code reading. It offers advanced resets and reliable OBD2 coverage without moving into pro-level pricing.
Best For
Best for home mechanics and small shop owners who need a robust, versatile scanner under $400.
Pros and Cons
Pros:
- Wide reset and relearn functions
- Good screen and interface
- Strong OBD2 and CAN FD compatibility
- Solid build quality
Cons:
- Learning curve for advanced functions
- Occasional firmware updates may be needed
Customer Reviews
Customer Review: I own vehicles from a wide range of years and needed a scanner to cover late 90’s OBD II systems. I reached out to Xtool to see if the D5S scanner would perform a Crankshaft Sensor Relearn on my ‘98 Chevy truck, and they were able to confirm it would after being provided with the VIN.I set up the sc
Customer Review: Update: I’ve been able to use this scanner a bit now and it has impressed me quite a bit. The screen is clear and bright, touch controls are responsive and navigating menus is a breeze.Outside of Amazon sending me a used and returned unit it has performed flawlessly. It pulls up codes pretty quickly
2. Thinkdiag2 Bidirectional All System OBD2 Scanner for iOS Android Bluetooth with CAN FD and over 15 Resets
The Thinkdiag2 is compact and powerful. It pairs with your phone and brings OE-level diagnostics plus CAN FD support for newer vehicles.
Key Features That Stand Out
✓ Bidirectional tests and active commands from your smartphone
✓ Full-system diagnostics with CAN FD protocol support
✓ Over 15 service resets included
✓ Lightweight Bluetooth dongle design
Why We Recommend It
Thinkdiag2 is ideal if you want pro-style diagnostics in a pocket-sized tool. It’s great for quick troubleshooting and advanced testing without a bulky scanner.
Best For
Best for tech-savvy DIYers and mobile techs who value portability and deep system access.
Pros and Cons
Pros:
- Supports CAN FD for newer vehicles
- Bidirectional controls for active tests
- Compact and easy to carry
- Works with iOS and Android
Cons:
- Relies on a phone for display
- Some advanced functions require app familiarity
Customer Reviews
Customer Review: The Thinkdiag2 Bluetooth OBDII Scanner is a professional-grade diagnostic tool that elevates the capabilities of your smart device to those of a seasoned technician. Notably, it’s the sole tool in its category to support CAN FD protocol vehicles, particularly advantageous for post-2020 GM models, st
Customer Review: If you’re a DIYer who wants to stop guessing which part to throw at a problem, or a tech who wants a powerful “pocket” size scanner. this is the one. I like my snap on but it’s nice having something for quicker diags that don’t really require the $5k scanners. It’s the first Bluetooth dongle I actu
3. T600 OBD2 Scanner Code Reader for Vehicles with Read Clear Codes Live Data and over 50000 DTCs
The T600 is a straightforward handheld scanner that reads and clears codes fast. It includes a large DTC library and live data for quick checks.
Key Features That Stand Out
✓ 50,000+ DTC library for wide code coverage
✓ Live data streaming and clear codes function
✓ Plug-and-play compatibility with OBD2 vehicles (1996+)
✓ Intuitive menus and clear icons for quick use
Why We Recommend It
For budget-minded buyers, T600 offers essential features without clutter. It’s reliable for routine checks and basic troubleshooting.
Best For
Best for owners who want a no-frills, dependable code reader with good data coverage.
Pros and Cons
Pros:
- Large DTC database
- Easy to use display and menus
- Fast code reads and clears
- Good value for money
Cons:
- Limited advanced service functions
- Basic UI compared to phone-based apps
Customer Reviews
Customer Review: I got this because these days you just have to have one. This tool has saved me countless time and money. I recently used it to see why my wife’s car was running poorly. I found that the one of the coil packs was fouling. It also allowed me to clear and DTCs that were still in the system, when I
Customer Review: I’m an older seasoned automotive technician, I’m reviewing this product based on my many years of experience in the field using high quality tools and equipment. This OBD2 code reader scanner is for vehicles 96 and newer, scanner will not work with any pre 1996 vehicles. Scanner is the smaller hand
4. XTOOL Anyscan A30M Bidirectional OBD2 Scan Tool for Android iPhone with 26 Resets and Crank Throttle Relearn
The XTOOL Anyscan A30M uses your phone as the display and brings 26 resets plus bidirectional control. It’s a modern option for techs who prefer an app-driven workflow.
Key Features That Stand Out
✓ 26 reset functions including throttle and crank relearn
✓ Bidirectional controls and active tests
✓ Wireless connectivity for Android and iPhone
✓ Lifetime app updates for supported features
Why We Recommend It
The A30M is great for users who like a phone interface with broad reset options. It speeds up diagnostics when you need targeted system tests.
Best For
Best for DIYers and pros who want app-based control and many service functions.
Pros and Cons
Pros:
- Many reset and relearn options
- Convenient app interface
- Wireless and portable
Cons:
- Requires phone for full use
- Initial setup can be fiddly for some users
Customer Reviews
Customer Review: The media could not be loaded.The XTOOL A30M has most (if not all) of the scan, monitor, and control functions to assist the home, or pro car mechanic to assess the condition of a vehicle’s onboard diagnostic info, with the additional capability of testing / energizing critical components in assorte
Customer Review: As a DIY mechanic, this Bluetooth OBD2 scanner has been very useful. It uses your phone as the display, which makes reading data and navigating menus much easier than a small handheld scanner. Setup took a little figuring out the first time, but after that it connects quickly and works reliably.The
5. VDIAGTOOL VD10 OBD2 Scanner Code Reader Turn Off CEL, Freeze Frame, IM Readiness for OBDII Cars
The VDIAGTOOL VD10 is a simple, reliable code reader. It reads and clears codes and shows freeze frame and readiness status quickly.
Key Features That Stand Out
✓ Read and clear check engine light codes
✓ Freeze frame and IM readiness reports
✓ On-device code definitions for quick lookup
✓ No phone required—standalone unit
Why We Recommend It
VDIAGTOOL VD10 is a handy, affordable pick for anyone who wants a straightforward reader without needing apps or Bluetooth pairing.
Best For
Best for car owners who want a standalone, easy-to-use OBD2 reader for occasional diagnostics.
Pros and Cons
Pros:
- Easy to use with clear readouts
- Good build quality for the price
- No smartphone required
Cons:
- Limited advanced features compared to bidirectional tools
- Basic display and UI
Customer Reviews
Customer Review: This worked perfect for what I needed. Very easy to use and easy to read the codes. Quality seems really good, especially for the price.
Customer Review: As a “shade tree” mechanic fixing my own vehicles I can’t do much without a good (cheap) code reader. My old BT model would not connect to my phone, so I ordered this all-in-one setup. Works great, easy to use, no phone app or finicky BT required. Most surprisingly it comes with a decent little m
6. OBD2 Code Reader with Reset Mode 6 Mode 8 and IM Readiness for OBDII Cars since 1996
This OBD2 reader focuses on core OBDII functions plus Mode 6 and Mode 8 checks. It’s well-suited to diagnosing emissions and readiness issues.
Key Features That Stand Out
✓ Mode 6 and Mode 8 diagnostic support
✓ Built-in DTC lookup (35,901 codes)
✓ Broad vehicle compatibility (1996+)
✓ Simple UI for quick scans
Why We Recommend It
It’s a practical scanner if you need deeper OBDII data like Mode 6 for emissions testing. The DTC library saves time when identifying faults.
Best For
Best for owners and techs focused on emissions, readiness checks, and detailed OBDII diagnostics.
Pros and Cons
Pros:
- Extensive DTC lookup onboard
- Supports advanced OBDII modes
- Works with many car brands
Cons:
- Not as feature-rich for service resets
- Screen and design are utilitarian
Customer Reviews
Customer Review: I have tried several scanners before this one. This scanner works with my vehicle 1st try and is EZ peasy to operate. It worked on a 2003 Infiniti Q45 that other scan tools would not. Others that work via Bluetooth with cell phone would connect but were too complicated to quickly diagnose. This scan
Customer Review: Works very well with my Volvo. Has saved me money!Read more
7. BluSon YM319 OBD2 Scanner with Battery Tester Live Data DTC Lookup for OBDII Cars since 1996
The BluSon YM319 adds a battery tester and live data plotting to standard code reading. It’s handy for quick health checks beyond the engine codes.
Key Features That Stand Out
✓ Integrated battery health test
✓ Live data recording and DTC lookup
✓ Fast code read and clear
✓ Compatible with OBDII vehicles since 1996
Why We Recommend It
BluSon gives extra value with battery tests and live plotting. It’s useful when you suspect electrical or charging issues alongside engine faults.
Best For
Best for drivers who want combined engine and battery checks in one affordable tool.
Pros and Cons
Pros:
- Battery tester built-in
- Live data and plotting capability
- Simple and affordable
Cons:
- Limited advanced service functions
- May lack depth for pro-level diagnostics
Customer Reviews
Customer Review: For the price point this is all you need, its clears codes and tells you everything you could need to know.
Customer Review: For the price point this is all you need, its clears codes and tells you everything you could need to know.Read more
8. Bluetooth OBD2 Scanner Wireless Diagnostic Tool for iOS Android with Live Data Clear Codes Reset Performance Test
This Bluetooth OBD2 scanner links to iOS and Android and shows live data, clears codes, and runs performance checks. It’s app-driven and easy to use.
Key Features That Stand Out
✓ Wireless Bluetooth connection to phone apps
✓ Live data streaming and performance tests
✓ Clear codes and reset functions
✓ Compact dongle design
Why We Recommend It
If you prefer a phone-based interface with live visuals, this scanner gives clear data and smooth app experience for basic to mid-level diagnostics.
Best For
Best for DIYers who like real-time graphs and phone connectivity for diagnostics.
Pros and Cons
Pros:
- Easy app integration
- Good live data visualization
- Portable and affordable
Cons:
- Dependent on phone battery and app updates
- May lack advanced service functions
Customer Reviews
Customer Review: This OBD2 scanner is a must-have tool if you work on your own vehicles or just want to know what’s going on under the hood. I’ve tested it on multiple cars and it connected fast and easy with both iOS and Android. The exclusive app it comes with is clean, easy to use, and gives real-time data withou
Customer Review: Works as it says in the description! I have used this for two vehicles so far and the app and reader are very simple to navigate and use! I would recommend this product.
9. XTOOL Anyscan A30D Bidirectional OBD2 Scanner with 19 Resets Crank Relearn System Diagnostics for iPhone Android
The XTOOL Anyscan A30D is a solid mid-range scanner with bidirectional control and 19 reset functions. It offers the convenience of phone-based reading with deep diagnostic tools.
Key Features That Stand Out
✓ 19 reset functions including crank relearn
✓ Bi-directional control for active testing
✓ Free lifetime updates on many features
✓ Compact and easy to use with an app
Why We Recommend It
A30D balances features and cost well. It’s a strong pick for users who want many reset functions without a pro-level price tag.
Best For
Best for DIY mechanics who want pro-level features packaged in a portable unit.
Pros and Cons
Pros:
- Many reset and relearn functions
- Simple app-driven workflow
- Lifetime update policy for many features
Cons:
- Build quality could be improved
- Some advanced functions need practice
Customer Reviews
Customer Review: XTool A30DI recently purchased the XTOOL Anyscan A30D wireless scan tool. I already have theXTOOL IP608, which has been great. It has helped me to pin point some issues I was havingwith a vehicle throwing codes, that had nothing to do with the sensor that was bad.I wanted a device with some bi-direc
Customer Review: So far so good, it’s app it’s quite easy to navigate, and provides a lot of information, the license does not expire, and the integration of a small lantern on the obd reader is a plus when working on the night or dark spaces, totally satisfied with it.The only con might be quality of the constructi
10. LAUNCH CRP129E OBD2 Scanner with 12 Service Resets CANFD DOIP FCA AutoAuth ABS SRS Transmission Engine Reader
The LAUNCH CRP129E is feature-rich and built for more serious DIYers and small shops. It adds service resets and modern protocol support like CAN FD and DoIP.
Key Features That Stand Out
✓ 12 service resets for common maintenance jobs
✓ CAN FD, DoIP and FCA AutoAuth support
✓ Broad system coverage including ABS, SRS, transmission
✓ Updated hardware for expanded vehicle coverage
Why We Recommend It
CRP129E is a strong option if you want near-shop functionality at a mid-range price. It covers many systems that cheaper readers skip.
Best For
Best for advanced DIYers and small repair shops that need multi-system diagnostics and service functions.
Pros and Cons
Pros:
- Wide vehicle and system coverage
- Multiple service resets included
- Modern protocol support for newer cars
Cons:
- Heavier and more complex than simple code readers
- Higher price within this roundup
Customer Reviews
Customer Review: The LAUNCH CRP129E scan tool proves itself a reliable, user-friendly device that delivers thorough diagnostics and convenient reporting, making it appealing for both home garages and professional shops. Tested on multiple vehicles—including a 2002 Ford Taurus with actual drivability issues, as well
Customer Review: The LAUNCH CRP129E scan tool proves itself a reliable, user-friendly device that delivers thorough diagnostics and convenient reporting, making it appealing for both home garages and professional shops. Tested on multiple vehicles—including a 2002 Ford Taurus with actual drivability issues, as well
Complete Buying Guide for Best Obd2 Scanner Under $400
Essential Factors We Consider
We looked at compatibility, feature set, ease of use, and real-world reliability. A good scanner should read and clear codes, show live data, and offer the resets you actually need. We also checked whether a device needs a phone or works standalone.
Budget Planning
Under $400 you can get very capable tools. Expect handheld scanners with multiple resets or Bluetooth dongles with app-driven bidirectional controls. Decide if you need service resets or just code reading and live data—resets and bidirectional tests usually raise price.
Final Thoughts
Pick a scanner that matches your routine. For occasional code checks, a simple reader is fine. For regular maintenance or small-shop work, choose a model with resets, bidirectional control, and solid firmware updates. Always check real user reviews for reliability signals.
Frequently Asked Questions
Q: What does OBD2 compatibility mean?
A: OBD2 compatibility means the scanner works with the standard diagnostic protocol used in most cars made since 1996. Some newer cars also use CAN FD or DoIP; the best scanners support those too.
Q: Do I need a Bluetooth scanner or a handheld unit?
A: Choose Bluetooth if you like phone apps and live graphs. Pick handheld if you want a standalone tool without relying on a phone. Both types can be good under $400 depending on features you need.
Q: Can these scanners perform service resets?
A: Many models here offer common service resets (oil, EPB, IMMO, crank relearn). Check the product details for the exact resets included; higher-end models in this list include more functions.
Q: Are bidirectional tests necessary?
A: Bidirectional tests let you command components from the tool, which helps diagnose certain faults. They’re handy for advanced DIYers and techs but not required for basic code reading.
Q: How often should I update scanner software?
A: Update when the manufacturer releases firmware or app updates. Updates add car coverage and fix bugs. If you rely on your scanner for work, check for updates regularly.
Thanks for reading. If you found this roundup helpful, pick a scanner that fits your workflow and budget. Click any “Check Price on Amazon” button to see current pricing and availability. Happy diagnosing!
