If you’re hunting for the best obd2 scanner under $400, this roundup makes the choice easier. Below you’ll find nine top picks that cover everything from basic code reading to advanced ABS/SRS and transmission resets. Whether you want a simple Bluetooth dongle or a handheld all-system tool, these options balance features and value.
Quick Product Comparison
Our Top 9 Best Obd2 Scanner Under $400 Reviews – Expert Tested & Recommended
1. OBD2 scanner with ABS SRS transmission resets, full OBDII diagnostics, battery check, best OBD2 scanner under $400
The OBD2 scanner here is a solid all-rounder. It reads engine, ABS, SRS and transmission codes and can reset warning lights. The 3.5″ screen makes results easy to read on the go.
Key Features That Stand Out
- ✓ Reset ABS, SRS, transmission and engine lights
- ✓ Full OBDII functions plus I/M readiness
- ✓ 3.5″ TFT display with clear menus
- ✓ Battery voltage check and live data stream
Why We Recommend It
This unit gives DIYers near-professional diagnostics without the pro price. It covers more systems than basic code readers and is easy to navigate. Reliability and clear output make troubleshooting quicker.
Best For
Best for car owners who want a handheld scanner that handles engine and safety system codes. Great for weekend mechanics and small repair shops.
Pros and Cons
Pros:
- Wide system coverage beyond basic OBDII
- Large, easy-to-read screen
- Sturdy build for regular use
- Includes battery check and I/M readiness
Cons:
- Bulkier than dongle-style scanners
- Manual could be clearer on some advanced functions
Customer Reviews
Customer Review: “The product is reliable. The quality is high. It’s easy to use and accurate for my car. I’d love to recommend this product.”
Customer Review: “This scanner works great right out of the box! It quickly reads engine, ABS, SRS, and transmission codes. Very easy to use with a clear interface and fast response. Helped me reset warning lights and check battery voltage with no problem. A must-have tool for DIY car diagnostics!”
2. FIXD Bluetooth OBD2 scanner for iPhone/Android, wireless check engine reader for 1996+ cars, best under $400
FIXD is a simple Bluetooth dongle that pairs with iPhone and Android. It translates codes into plain language and offers maintenance reminders. It’s ideal if you prefer phone-based diagnostics.
Key Features That Stand Out
- ✓ Bluetooth connection to phone app
- ✓ Clear, user-friendly code explanations
- ✓ Tracks maintenance history for multiple vehicles
- ✓ Access to an optional on-call mechanic service
Why We Recommend It
FIXD makes diagnostics approachable for non-mechanics. The app helps you decide whether a repair needs a shop visit. It’s light, simple and saves time on basic troubleshooting.
Best For
Best for everyday drivers who want fast, clear answers on check engine lights using their phone.
Pros and Cons
Pros:
- Very easy to set up and use
- Helpful plain-language reports
- Supports multiple vehicles in the app
- Small, unobtrusive dongle
Cons:
- Requires phone for full functionality
- Advanced systems (ABS/SRS) not supported
Customer Reviews
Customer Review: “Got one primarily for a 2014 Mustang but end up using it on all our vehicles. Works great and spells out the issues clearly. Also allows you to track the maintanance items for each vehicle, like Car Fax does which is great. Was able to decipher, fix and clear the engine code without any issues or ou”
Customer Review: “Exactly like is supposed to do. When I was out of range on bluetooth, it saved the infor when I was able to get connected and provided the info. Very through!”
3. ZMOON ZM201 OBD2 scanner, check engine reader and reset, OBDII diagnostics for 1996+ vehicles, best under $400
ZMOON ZM201 is a straightforward, budget-friendly scanner for 1996+ vehicles. It reads and clears engine codes and shows live data. It’s small but packs useful features for home mechanics.
Key Features That Stand Out
- ✓ Wide vehicle compatibility (1996+ US)
- ✓ Live data stream and freeze frame
- ✓ Clear code reading and reset function
- ✓ Compact handheld design
Why We Recommend It
This is a value buy for owners who want dependable engine diagnostics without extra bells. It’s reliable for frequent use and handles everyday code clearing well. The live data helps confirm fixes.
Best For
Best for budget conscious DIYers and those who need a simple handheld tool for basic diagnostics.
Pros and Cons
Pros:
- Affordable with essential features
- Good live data and freeze frame support
- Easy to use menu layout
Cons:
- Not as feature-rich as pro handhelds
- Small screen can be cramped for long sessions
Customer Reviews
Customer Review: “I got this for our 2018 Nissan Sentra when the check engine light popped on, and I’m so glad I did! I had been thinking about getting one for a while, but that little warning light pushed me over the edge. Having this at home is a total game-changer—I no longer have to run to the auto parts store or”
Customer Review: “I have a 2014 F-250 6.7L Diesel. I pop codes constantly because of some modifications. This works great, let’s me clear the codes and get back to using remote start. (Remote start doesn’t work if an active engine code is on)”
4. OBDLink MX+ OBD2 Bluetooth scanner for iPhone, Android and Windows, best OBD2 scanner under $400
The OBDLink MX+ is a powerful Bluetooth adapter for phones and PCs. It works with many third-party apps and supports enhanced OEM features. This makes it versatile for enthusiasts who tweak settings or monitor advanced data.
Key Features That Stand Out
- ✓ Bluetooth LE for stable wireless connection
- ✓ Broad app compatibility (Torque, FORScan, etc.)
- ✓ Enhanced OEM support for many makes
- ✓ Fast data rates and low latency
Why We Recommend It
We like this for people who want a compact scanner that hooks into powerful apps. It opens up advanced diagnostics without needing a full handheld. Good for tuning and live data monitoring.
Best For
Best for tech-savvy owners and hobbyists who use apps for logging or tuning.
Pros and Cons
Pros:
- Excellent wireless stability
- Supports many third-party apps
- Small and easy to move between cars
- Fast data transfer for live graphs
Cons:
- Requires compatible app for full features
- Not a standalone handheld device
Customer Reviews
Customer Review: “This is a great little OBD2 Scanner. So easy to use, gives you a ton of data and works with a ton of third party apps that allow you to make modifications that the dealers would charge you a ton of money for. I bought this for my 2021 Ram 1500 Big Horn so I could change the circumference of the tire”
Customer Review: “What a great product! It is so customizable you can configure the screen on your phone to any dial/readout you want. The choices are infinite. This scanner works perfectly with my gen 4 Ram 3500 Cummins. I got it to monitor the EGT 1 for turbo cool down so I don’t destroy it upon stopping after long”
5. AI-powered Bluetooth OBD2 scanner for iPhone and Android, real-time diagnostics for 1996+ cars, best under $400
This tiny Bluetooth scanner uses AI to translate codes and generate easy car health summaries. It streams live data and is great for users who want quick explanations without technical jargon. It’s compact and truly plug-and-forget.
Key Features That Stand Out
- ✓ AI-driven diagnostics and readable reports
- ✓ Real-time data graphs on your phone
- ✓ Ultra-compact wireless design
- ✓ No cables and easy storage
Why We Recommend It
If you dislike decoding OBD codes, this unit helps by explaining issues in plain English. The AI reports shorten the learning curve and speed up decision-making. Great for non-technical users.
Best For
Best for casual drivers who want easy, actionable car-health information on their phone.
Pros and Cons
Pros:
- Simple AI summaries make sense of codes
- Tiny form factor that stays plugged in
- Good live-data visualization on mobile
- No complex setup required
Cons:
- AI insights can miss rare or complex issues
- Dependent on smartphone app stability
Customer Reviews
Customer Review: “My husband really loves this Bluetooth OBD2 scanner and uses it all the time in his car. It connects quickly to his phone and is very easy to use, even if you’re not a mechanic. The app gives clear and accurate information about the car, helps identify engine codes, and saves a lot of time and money”
Customer Review: “This OBD2 scanner is super easy to use and connects instantly to my phone. The AI reports make error codes simple to understand, even for beginners. I love seeing real-time data and clearing the check engine light myself. No subscription fee is a big plus. It’s compact, reliable, and gives me real p”
6. XTOOL Anyscan A30M OBD2 bidirectional scanner, 26 resets, all-system diagnostics, EPB and throttle relearn, best under $400
The XTOOL Anyscan A30M brings bidirectional control and multiple reset functions to the table. It supports active tests, makes relearns easier, and gets lifetime app updates. It’s a great mid-range choice for deeper vehicle maintenance.
Key Features That Stand Out
- ✓ Full bidirectional control and active tests
- ✓ 26 service resets including EPB and throttle relearn
- ✓ Lifetime software updates for app functions
- ✓ Stable wireless connectivity
Why We Recommend It
The A30M is for users who need more than code reads. Bidirectional control and resets let you perform service tasks at home. The app keeps improving with updates, adding value over time.
Best For
Best for car owners who perform regular maintenance or need active tests to diagnose problems.
Pros and Cons
Pros:
- Powerful bidirectional features for hands-on repairs
- Wide range of reset services
- Helpful app with lifetime updates
- Good live diagnostics accuracy
Cons:
- Learning curve for advanced features
- Some models require a strong phone connection for full functionality
Customer Reviews
Customer Review: “I’ve owned the Anyscan A30M for over a year and thought it was great for the money. I used it with my IPad. I used it to help fix a couple of my cars and some friend’s cars. The bi-directional and live data features made this a very useful tool and much better than most other scanners in the price “
Customer Review: “I’ve been using this on and off for about a year now and it’s just been a solid performer. I’ve never had an issue where I cannot diagnose it with this reader. The diagnosis is always spot on and the readings are always accurate. The app is easy to use and so far I have not had a single issue wit”
7. TOPDON AD600S OBD2 scanner, ABS SRS code reader, nine reset services and injector coding, best under $400
TOPDON AD600S covers major systems including ABS and SRS and includes nine reset services. It’s a practical handheld scanner with a clear interface. This one suits drivers who want more than just engine codes.
Key Features That Stand Out
- ✓ ABS, SRS and transmission code reading
- ✓ Nine reset services including TPMS and SAS
- ✓ Injector coding and related functions
- ✓ User-friendly interface with updates
Why We Recommend It
The AD600S strikes a balance between capability and price. It handles common service resets and safety system diagnostics well. For most owners, it removes the need for many shop visits.
Best For
Best for owners who want to perform maintenance resets and diagnose safety systems at home.
Pros and Cons
Pros:
- Good coverage of multiple systems
- Simple to navigate menu
- Includes useful reset functions
- Clear screen for data viewing
Cons:
- Not as compact as Bluetooth dongles
- Some advanced functions may need firmware updates
Customer Reviews
Customer Review: “I bought the TOPDON AD600S to diagnose issues on my Ford Raptor and it’s been worth every penny. The setup was easy, and the interface is super user-friendly—even if you’re not a pro mechanic. I was able to read and clear codes, run live data, and reset a few systems without any hassle. The screen i”
Customer Review: “This is an excellent scanner with features well beyond a basic code reader. It not only reads and clears engine codes but also covers ABS, SRS, and transmission systems, plus offers 9 reset services like TPMS, brake, SAS, and injector coding. The interface is easy to use, updates are lifetime and fr”
8. CF06 OBD2 scanner, code reader and battery health test, compatible with 1996+ vehicles, best under $400
The CF06 focuses on fast reads and battery health checks. It’s upgraded with better RAM and chips for snappy performance. If you want a quick scanner that boots fast and gets to work, this one fits well.
Key Features That Stand Out
- ✓ Fast read speeds with upgraded hardware
- ✓ Battery health and voltage tests
- ✓ Live data, freeze frame and I/M readiness
- ✓ Works with most 1996+ vehicles
Why We Recommend It
CF06 is for users who value quick results and a responsive device. Upgraded internals reduce lag and the battery test is a handy addition for roadside checks. It saves time when you just need a fast diagnosis.
Best For
Best for people who want a fast, reliable scanner focused on engine codes and battery checks.
Pros and Cons
Pros:
- Speedy performance thanks to better hardware
- Useful battery health tests
- Good value for everyday diagnostics
Cons:
- Interface is functional but not flashy
- Limited advanced system coverage compared to pro models
Customer Reviews
Customer Review: “One week ago a ordered a different scanner from Amazon and it was not Good. It does detect the problem but was not able to delete errors codes. I ordered this scanner and it works just amazing. Super fast with a lot of functions.Very glad that I choose this model. Highly recommend.”
Customer Review: “Worked perfectly on 2021 Ford Escape Hybrid. I was able to read and erase codes. The code shown was correct. Now my check engine light is off and the issue is resolved. It’s already paid for itself on the first day of use.Note that the Carfever CF06 code reader instructions say that it doesn’t work “
9. OBD2 scanner with code reader, reset, battery test and live data for 1996+ cars, best under $400
This VEHLIVE-style scanner offers broad OBDII diagnostics with battery testing and a large onboard DTC library. It’s a practical tool for owners who want trusted code lookups and basic service abilities.
Key Features That Stand Out
- ✓ Extensive DTC database (~98,963 codes)
- ✓ One-click I/M readiness and battery test
- ✓ Live data and freeze frame
- ✓ Compatible with 1996+ OBDII vehicles
Why We Recommend It
This model saves time with a huge built-in code library and quick readiness checks. It’s a solid pick for someone who needs reliable, everyday diagnostics and clear code definitions.
Best For
Best for owners who want in-device code lookups and quick battery or readiness checks without relying on phone apps.
Pros and Cons
Pros:
- Very large DTC lookup library
- Easy one-click readiness and battery checks
- Good screen size for clarity
- Reliable basic diagnostic features
Cons:
- UI text can be small for some users
- Not intended for deep OEM-level programming
Customer Reviews
Customer Review: “This OBD2 reader is as advertised! It’s easy to use (once you get through squinting to read the small print of the owner’s manual) and works as advertised. Just plug it in and scroll to select what you want to see. It came already set up for English and inch/°F/psi data, and the screen is bright “
Customer Review: “Very Happy with Reader.This code reader is easy to connect and Work great, is able to get a code and is able to good my car knowing exactly what was going on so that you may make an informed decision about whether a trip to the mechanics warranted.In addition, 2.8 inches Screen is good size. Compat”
Complete Buying Guide for Best Obd2 Scanner Under $400
Essential Factors We Consider
When picking the best obd2 scanner under $400, we look at system coverage, ease of use, connectivity, and update support. System coverage means engine plus ABS, SRS or transmission if you need them. Connectivity matters if you prefer Bluetooth or a standalone handheld. Updates keep the tool current as vehicle software changes.
Budget Planning
Under $400 you’ll find solid handhelds and advanced Bluetooth adapters. Decide if you need advanced resets and bidirectional controls. If you only want check engine readings, a $30–$100 dongle is fine. For active tests and resets, expect to spend $150–$350.
Final Thoughts
Choose the tool that fits how you work on cars. For phone-focused use, pick a reliable Bluetooth adapter. For standalone diagnostics and resets, a handheld with larger coverage is better. Always check compatibility with your vehicle make and the types of repairs you plan to do.
Frequently Asked Questions
Q: What does OBD2 scanner do?
A: An OBD2 scanner reads diagnostic trouble codes from a vehicle’s computer. It helps identify issues, view live sensor data, and in many units clear warning lights after fixes.
Q: Do I need a scanner with ABS and SRS support?
A: Only if you want to diagnose or reset airbags (SRS) and anti-lock brakes (ABS). Basic check engine readers won’t cover these systems. If you care about safety system diagnostics, choose a scanner with those capabilities.
Q: Are Bluetooth dongles reliable?
A: Yes, many Bluetooth dongles are reliable for monitoring and basic diagnostics. Their performance depends on the dongle quality and the app you use. They are portable and cost-effective.
Q: Can these scanners work on older or newer cars?
A: Most scanners here support US OBDII vehicles from 1996 onward. For some non-US models or diesel trucks, check the product compatibility notes before buying.
Q: How do software updates work?
A: Updates can be delivered via app or manufacturer software. Some devices include free lifetime updates, while others may require paid upgrades. Regular updates help with new car models and fixes.
Thanks for reading our guide on the best obd2 scanner under $400. If you found a model that fits your needs, click the “Check Price on Amazon” button to see current pricing and availability. A small tool can save you time and avoid unnecessary trips to the shop.