While the Foxwell NT201 doesn’t offer much in the way of advanced functions, we found that it does provide basic data collection, real-time engine data, and freeze-frame data. With this device, you’ll be able to read and clear your own engine codes with ease.

There are several different communication “protocols” that onboard computers may use to communicate with an OBD2 scanner. The most common are:

More advanced OBD2 scanners can be more complicated, but not necessarily more difficult to use. Advanced OBD2 scanners with menus that are clear, informative, and easy to navigate score well in this category.

Everything about the TOPDON is designed for easy use and handling. The Bluetooth dongle slots into the scanner itself and is easily removed with a single push. Setting up the TOPDON requires an internet connection and we were required to input our included activation code. Once the account is made, TOPDON provides free lifetime updates.

An OBD2 scanner can cost anywhere from $20 to $500. A low-cost, reliable OBD2 scanner can be purchased for $20 to $40, while the more advanced scanners range from $200 to $500. Unless you’re a professional mechanic, you probably don’t need the most expensive option.

The BlueDriver Bluetooth Pro OBDII Scan Tool is compatible with a range of vehicles and is incredibly easy to use. It comes as a small box that plugs into your vehicle’s OBD2 port, which is usually located beneath the steering column.

We team member tested each OBD2 scanner on a 2017 Ford Fusion Hybrid, taking note of ease of use and data collection capabilities. In particular, we examined (and tested):

The right OBD2 scanner depends on the vehicle data you’re looking to access and the work a vehicle requires. Expect to pay more if you need to send commands to the vehicle’s system or want features such as a touchscreen.

As a member of both the APA and IMPA, Charles Noyes has devoted himself to creating and refining quality content covering automotive products and accessories, motorcycle products, RV products, and more. As the lead editor serving the product review team, he has personally reviewed, critiqued, and fact-checked over 200 product reviews.

Those less-than-happy with the NT201 claim it doesn’t work well with uncommon vehicles. For the most popular makes and models, the NT201 seems to work great. However, it may lack the ability to read codes for uncommon foreign, discontinued, and luxury car models. At least one SAAB owner said this scanner did not work with their vehicle’s computer.

For many drivers, the Foxwell NT201 is the best bet for an OBD2 scanner. If you’re just looking for an OBD2 scanner that can read and clear engine codes, that’s the Foxwell. The ability to run an I/M readiness check and scan ABS systems can also be useful, even to the layperson. These features are all common among $40 OBD2 scanners.

Users are pleased with the scanner’s ability to detect fault codes, even those that may not show up on other scanners. Others praise the TOPDON for being a professional-level scan tool that is nonetheless easy for mechanics of almost any skill level to navigate.

Autel updates the device for free for your first year of ownership, but it already comes with plenty of information about American, European, and Asian car brands. Also included is an app that stores automotive and customer data, so you get an OBD2 scanner and logbook all in one.

For many drivers, the Foxwell NT201 is the best bet for an OBD2 scanner. If you’re just looking for an OBD2 scanner that can read and clear engine codes, that’s the Foxwell. The ability to run an I/M readiness check and scan ABS systems can also be useful, even to the layperson. These features are all common among $40 OBD2 scanners.

We found it similar, in terms of functions, to other $30 OBD2 scanners. That is, except until paired with the app, which offers more features, including repair suggestions, details about potential replacement parts, and freeze frame data.

The scores in each category are compiled into a single overall rating that ranges from 1.0 to 5.0 stars. Each auto code scanner’s ratings, including their overall ratings and awards from our team, are highlighted below:

This can be a wonderful option if you’re looking for a “set it and forget it” tool that collects data while you’re driving, but it also lets users look under the hood while running a diagnostic. However, some higher-end scanners come with internal batteries that last for hours, so the amount of information you need will dictate the best OBD2 scanner for your job.

You’ll need a specialized scanner if you want to perform more advanced tasks, like reprogramming your engine control module. Sending commands or changing vehicle settings is helpful if you’re working with temperature sensors or tire pressure monitors. Access to readings such as the ABS and misfire information can help better diagnose a car’s overall health.

If a Bluetooth OBD2 scanner seems like a better fit for you, we’ve reviewed and tested a handful of the top products on the market.

Each year, we test over 350 auto products on vehicles and in our testing lab. Our team of product testers thoroughly researches top products, unboxes and puts our hands on each component, and tests the items on real vehicles before making recommendations to readers.

Some DTCs apply to all vehicle makes, while others are specific to certain brands. The first number in a DTC is always either 0 or 1. ‘0’ is a universal (generic) code and ‘1’ is a manufacturer-specific code.

Every OBD2 scanner we test is given a score between 1.0 and 5.0 stars in each category. Here’s what those star ratings mean in concrete terms:

Many of these OBD2 scanners’ advanced features are really only useful to home mechanics who feel comfortable working on their own vehicles and are not intended for average drivers. Just remember that more features and programming options mean a higher price tag.

Besides maybe breaking a few pins in the OBD2 port (which is very unlikely), code readers aren’t able to harm major vehicle systems.

Leaving an OBD2 scanner plugged in will not damage your car. In fact, OBD2 scanners should be plugged in while the car is running to avoid damaging the vehicle’s scanning software. However, scanners may drain power from the vehicle’s battery over a long period of time, so you should follow the device’s directions for unplugging once you’ve used it.

We publish hundreds of product and service reviews to bring car enthusiasts detailed guides on automotive tools, detailing kits, car seats, pet products, and much more. For more information on our testing methodology and how we evaluate every product, check out our methodology page here.

OBD and OBD2 are two different generations of automotive diagnostic car code readers. OBD refers to domestic vehicles made before 1996. OBD2 ports became commonplace after federal legislation implemented stricter environmental standards on American automakers.

OBD2 scanners can also clear codes from your system’s computer. If the underlying issue isn’t repaired, this code (and the check engine line) will eventually return.

The best OBD2 scanners can read codes from most major brands. If you plan to use your OBD2 scanner with a specific vehicle or set of vehicles, make sure it can read error codes for that manufacturer.

To help you find the best OBD2 scanner for your vehicle(s), our team has spent hours researching and testing products. We’ve narrowed the list to our top picks and provided recommendations for options with different uses and price points.

Image

While every OBD2 scanner has different buttons and a different interface, many of them work similarly. To use the most advanced functions of your scanner, you’ll need to check the owner’s manual. Otherwise, the process is very straightforward.

Our value score is based on our other ratings relative to the cost of the product. To receive a high rating in this category, an expensive OBD2 scanner must justify its price tag by offering features and functions well beyond a basic OBD2 code reader.

Along with conducting basic diagnostic tasks, we were able to set up customizable monitoring of basic information like engine RPMs and exhaust pressure. A full list of monitoring functions can be found here. For more information on this great OBD2 scanner, check out our dedicated review page here.

OBD2 scanners can be a great tool for someone doing car maintenance at home or just assessing the overall health of a vehicle.

Those looking for an advanced scanner to perform complex diagnostic functions should check out the TOPDON ArtiDiag800BT, which has a large touchscreen display and can test just about every system in your vehicle.

The CarScan Advisor is popular because it is easy to use. Many reviewers note that the ABS brake diagnosis function is appreciated, as not all basic scanners offer this feature. However, ABS scanning does not seem to work in older vehicles.

The Autel MaxiCOM MK808 is a feature-rich OBD2 scanner with a large touchscreen interface. It’s expensive, however, so not a good choice for those who only want to read and clear engine codes.

The ArtiDiag800BT is a great option for those looking for a code reader with key programming abilities. It is compatible with 96 vehicle manufacturers and capable of many advanced OBD2 functions. The large display also makes it good for viewing live data graphing. Those in need of only a basic code reader will find the TOPDON unnecessarily expensive. Though not quite as fast as the BlueDriver, the ArtiDiag800 BT is compatible with more vehicles and includes an expansive menu of tools and features.

All of the OBD2 scanners that we recommend are compatible with a broad range of vehicles. However, not every OBD2 scanner works perfectly with every vehicle. Each manufacturer (especially in different countries) uses its own computer protocol for storing vehicle fault codes. OBD2 scanners that support the broadest range of protocols score best in this category.

To help you find the best auto code scanner for your needs, we’ve tested several options from top brands at a range of different price points. In this review, we recommend our favorite OBD2 scanners based on hands-on testing and explain—in straightforward terms—the benefits and drawbacks of each one.

The Launch may not work with all vehicles, so check that it’s compatible with your make and model. For the backyard mechanic on a smaller budget, the Launch CRP129E is a solid choice.

Before we could use the Launch, we were required to set up the device, which required a WiFi connection. However, once set up, a persistent internet connection isn’t required, so you won’t need WiFi in your garage to use it. Even after setup was complete, the Launch took a bit longer to start compared to more basic scanners. That said, the Launch’s startup time is still relatively quick.

Our top overall pick is the BlueDriver Bluetooth Pro OBDII Scan Tool. The mid-price scanner is easy to use and works with a user-friendly app.

When we tried using the Launch to read an engine code, it did take longer than most others on this list. This is because the Launch scans several systems (not only the engine) and prepares a full diagnostic report.

An OBD2 scanner is a device that connects with a car to communicate with that vehicle’s onboard computer. OBD2 scanners have many functions, but the most basic is to “read” engine fault codes. When a check engine light comes on, an OBD2 reader can help you get a general description of the issue. These tools will display engine fault codes, the necessary starting point for diagnosing most modern automotive malfunctions.

Customers appreciate the intuitive touchscreen and data accuracy, with at least one customer noting that the product was able to read everything from VIN to transmission codes and send reports to his computer.

The numbers that follow may further specify the issue. If your OBD2 scanner shows a DTC, type this code (followed by the manufacturer, for manufacturer-specific codes) into any search engine to quickly learn what it indicates.

Since the functionality and features vary depending on the brand and model of car scanner, our review team breaks down each in the following sections to help you make an informed decision about which OBD2 scanner is right for you.

We found the large touchscreen interface to be easy to navigate, even without advanced auto maintenance knowledge. There is even a “learning” feature that explains the TOPDON’s advanced functions. The menu layout is among the most straightforward of the scanners that we tested.

To verify that each scanner could read an engine code, we unplugged the mass airflow sensor from our test vehicle and counted the number of button pushes it took to retrieve a code. Those that were quickly able to display an accurate fault code scored best in this category.

Our ease of use rating represents the relative ease or difficulty of operating the OBD2 scanner. Scanners that can retrieve engine codes with the fewest button pushes scored best in this category.

All you need is a smartphone with Bluetooth capability and the scanner’s corresponding app (which may not be free), and you can review data directly from your phone.

When you’re looking for the best OBD2 scanner, Bluetooth connectivity is worth considering. Since having a physical adapter cord usually keeps you close to the vehicle while you’re performing a diagnostic, wireless scanners are gaining popularity because of their simplicity and data collection capabilities.

Image

The CarScan Advisor 5110 is simple to operate and automatically reads codes as soon as it is plugged in. It’s a good pick if you want a no-frills code reader. Innova’s car scanner is a bit more expensive than other basic code readers, though it does include a wireless Bluetooth option.

Editorial Note: This content was researched and produced by Motor1.com‘s expert review team. Links in this article may result in us earning a commission but do not impact our advice or recommendations. Learn More

Buyers applaud the user interface, data output, and customer service. However, some reviews say updates to this OBD2 scanner don’t fix system bugs. Other users say the MK808 doesn’t support as many vehicles as advertised.

On the downside, some customers report slow customer service and say the device fails within a year. Another concern is that you must purchase certain features separately and renew them annually.

The accuracy of an OBD2 scanner depends on the model you buy and the extent of codes it can read. More advanced scanners can read a greater number of codes from different automakers, and perform more functions.

Will has written for several major auto sites including Motor1 since 2020, logging hundreds of hours researching and testing products ranging from child car seats to torque wrenches. Will is also Certified by Safe Kids Worldwide as a Child Passenger Safety Technician (#T836339).

We like the BlueDriver Bluetooth Pro OBDII Scan Tool after testing a multitude of OBD2 scanners at different price points. It is easy to use and will work with most vehicles.

This OBD2 scanner may be more than you need, especially if you find the extras distracting. The user manual is pretty thick, and we wouldn’t necessarily recommend this device if you’re simply trying to read error codes. It is an excellent choice for advanced users, however.

For those interested in learning more, we’ve provided a detailed review of each of the best OBD2 Scanners in the sections below:

If you’re looking to make simple repairs or ensure your car will pass inspection, a basic OBD2 scanner can be a great investment. If you’re taking a weekend to double-check an assessment from a mechanic or see why the check engine light is on, you’ll only need something that can read codes.

As a basic scan tool, the Foxwell NT201 does not have many functions, but it is compatible with most vehicle makes and models. The OBDII function is displayed in the first menu. The Foxwell NT201 is lightweight but does not feel especially durable. It doesn’t seem like this tool would survive many drops onto a hard floor.

The large touchscreen interface and long connection cable immediately stand out with the Launch CRP129E. Some OBD2 scanners have shorter cables that make it difficult to hold the device in your lap once connected.

The age of the vehicle determines what type of car diagnostic tool it will accept. Vehicles made after 1996 will have OBD2 ports. Older vehicles use the earlier OBD1 system, which requires different scanners.

At a minimum, any OBD2 scanner should be able to read and ideally clear DTCs. You may want an OBD2 scan tool for several reasons, even if you aren’t a professional mechanic. With an OBD2 reader, you can:

With that said, there are several other factors to look for in the best OBD2 scanners, including compatibility, Bluetooth capabilities, and protocols. In the following sections, we will detail each feature offered by the best OBD2 scanners to help you decide which one is best for you.

You can check your car’s OBD2 protocol by searching your year, make, and model followed by “OBD2 protocol” with a search engine.

Our top overall pick is the BlueDriver Bluetooth Pro OBDII Scan Tool. The mid-price scanner is easy to use and works with a user-friendly app.

The BlueDriver is one of the easiest-to-use OBD2 scanners we tested. After downloading the companion app, we plugged the scanner into our test vehicle and collected codes in seconds. The primary menu is broken into nine sections, the first two being the most useful: reading and clearing fault codes.

The most basic OBD function (which every OBD2 scanner should be able to do) is to read and ideally clear error codes. When your vehicle’s computer detects an issue, it records a diagnostic trouble code (DTC) that broadly describes the malfunction. A DTC starts with the letter P, B, C, or U, and is followed by a string of numbers. The first letter indicates what part of your vehicle has an issue.

For non-mechanics, the most useful OBD2 scanner features are reading error codes and the smog test. More advanced features are only useful when paired with at least some mechanic know-how.

Some question the data’s reliability and say the device isn’t compatible with as many vehicles as advertised. A few of the BlueDriver’s features seem more limited on European cars.

“Rarely, my preferred OBD2 scanner can’t read a code or nail down an issue. This happens when complex, proprietary electronics eclipse what a standard scanner can interpret.”

In addition to common codes, all cars also have manufacturer-specific fault codes. While most OBD2 scanners will accurately read most fault codes, this isn’t always the case. Jason Ferell, a certified master tech at Mechanic’s Diary told us,

The best OBD2 scanner in 2024 is the BlueDriver Bluetooth Pro. The TOPDON ArtiDiag800BT, Foxwell NT201, Motopower MP69033, Innova CarScan Advisor 5110, Launch CRP129E Scan Tool, Autel MaxiCOM MK808 Scanner, and Ancel B0310 round out our team’s picks as the best OBD2 scanners on the market.

Also like the Launch, the Autel can take some time to show engine codes because it scans several systems before doing so.

Those dissatisfied with this OBD2 scanner say that the battery drains quickly. Some also complain about advanced features not working, such as key programming. Features like key programming and anti-theft matching may only be available for certain vehicles.

Your first step is to find the OBD2 port. This is typically located beneath the steering wheel and to the left. The slot is shaped like a trapezoid and contains 16 pins. The location of this port should be described in your car’s owner’s manual.

Many mechanics that we interviewed about OBD2 scanner compatibility had something similar to say. Some fault codes are manufacturer specific and these can’t always be read by every scan tool.

While there is no instruction manual included, the NT201 is simple to operate, as there aren’t many buttons or menu options. This device is made to help users check engine codes and perform emissions tests. We recommend this OBD2 scanner for someone who wants to read their engine codes at home but doesn’t need to do much else.

Each automotive code scanner in this review was thoroughly tested and evaluated based on several categories, including ease of use, speed, compatibility, and overall value. You can find more specifics regarding our rating system here.

Bi-directional scanners are capable of reading information and sending commands to another device. OBD2 code readers are one example. They get a live data stream from the car’s OBD2 system, and some can clear problem codes. Examples range from turning off a check engine light to assessing the supplemental restraint system (SRS).

Will has written for several major auto sites including Motor1 since 2020, logging hundreds of hours researching and testing products ranging from child car seats to torque wrenches. Will is also Certified by Safe Kids Worldwide as a Child Passenger Safety Technician (#T836339).

Once installed, the BlueDriver connects via Bluetooth to a smartphone app, from which you can view live data reports from the engine and coolant systems. You can also perform a smog test with this scanner, and it will recommend possible repairs for specific codes.

The CarScan Advisor detects and reads engine codes as soon as it is connected. Among the OBD2 scanners that we tested for this review, the Advisor was the fastest to display an engine code.

Most automotive diagnostic tools perform similar functions, like reading codes or sending commands to the vehicle’s electronic control unit (ECU). Interfaces may look different between different models, and some will have more advanced features such as real-time monitoring of vehicle systems. Some might only read codes without having the ability to clear them.

A check engine light can signal a wide variety of issues, some of which are easy to fix at home. However, diagnosing the severity of any car trouble requires an onboard diagnostic (OBD) tool. The best OBD2 scanners typically cost around $100, but a standard OBD2 scanner for the average driver can go for around half that amount and can save you unnecessary trips to the mechanic by interpreting codes responsible for the light.

Image

Reviewers appreciate the Foxwell for its bright display and easy-to-operate interface. Most customers purchase this because they need something inexpensive to pull engine codes for their personal vehicles.

The Launch CRP129E is an expensive, advanced scan tool with a wide range of features. Its large, bright screen offers one of the best displays of any tool on the market, and it comes with free lifetime updates as long as you buy from an authorized dealer. The Launch CRP129E comes with data code protocols from nearly 60 carmakers and over 1,000 models, so this scanner likely knows something about your vehicle.

“No joke, I work on cars all the time. I’ve had cheap scanners and Snap-On scanners. For the price of this, you cannot go wrong. This little scanner reads not only engine codes, but also reads codes from transmission codes and BCM codes.” – Keith S. via Amazon

In order to read fault codes, your vehicle (and your vehicle’s computer) must be turned on. After attaching your OBD2 scanner, start your engine to receive real-time data and on-demand codes. If your engine won’t start, a scanner can still be helpful for clearing the codes and diagnosing the problem.

Mechanics typically tell us that the most important feature of any OBD2 scanner is that it can read engine codes. Other design features can be nice, but for many, a basic code reader is all they need. Zac Salerno, a technician at Import Performance and certified Safety Inspector with more than three years of experience, told us:

“You don’t need [an advanced code reader] right out the gate. A Foxwell will do you just fine. It’ll read your codes, you’ll get an idea of what’s going on. And that’s the biggest part, is at least getting a jumping-off point to figure out where your diagnosis starts.”

While many OBD2 codes are universal, a good number aren’t. If you have a vehicle produced prior to 1996 or an uncommon model, you may need to do some research to learn which OBD2 scanners will best interact with your vehicle.

Or, if you consistently work on multiple vehicles as a job or hobby, you may want a scanner compatible with foreign and domestic cars and receive updates regularly.

Those looking for an advanced scanner to perform complex diagnostic functions should check out the TOPDON ArtiDiag800BT, which has a large touchscreen display and can test just about every system in your vehicle.

The Autel has a robust and expansive user interface that resembles a PC desktop. We found the touchscreen easy to navigate, and the apps even include a web browser—a useful tool for looking up OBD2 code information. The Autel can connect to WiFi, which is necessary to use the device, at least at startup. You will need to set up an Autel account to use many of the scanner’s features.