Best OBD2 Scanners

Motor1 Reviews Team Take:

• Considering ease of use, scan speed, compatibility, and overall value, the best OBD2 scanners are the BlueDriver Bluetooth Pro, TOPDON ArtiDiag800BT, Foxwell NT201, and Innova CarScan Advisor 5110.
• A reliable code reader suitable for basic functions can be found for around $50. More advanced OBD2 scanners that include functions like wireless operation and detailed repair guides typically cost $100 or more.
• OBD2 scanners allow drivers to troubleshoot check engine lights that pop up on your dashboard, interpret codes, and can save you a trip to your local mechanic.

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.

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.

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What Is The Best OBD2 Scanner?

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.

Best Rated Auto Code Scanners

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.

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:

Brand/Model	Overall Rating	Award	Cost
BlueDriver Bluetooth Pro	4.5	Best OBD2 Scanner	$120
TOPDON ArtiDiag800BT	4.5	Best OBD2 Scanner with Key Programmer	$425
Foxwell NT201	4.3	Best Budget OBD2 Scanner	$60
Innova CarScan Advisor 5110	4.3	Best Bluetooth OBD2 Scanner	$65
Launch CRP129E	4.3	Best OBD2 Gauge Display	$310
Autel MaxiCOM MK808	4.1	Best Professional OBD2 Scanner	$510

*Because cost data fluctuates, the prices in the table above are approximate values that our team regularly updates.

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

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1. BlueDriver Bluetooth Pro OBDII Scan Tool: Best OBD2 Scanner

2. TOPDON ArtiDiag800BT: Best OBD2 Scanner With Key Programmer

3. Foxwell NT201: Best Budget OBD2 Scanner

4. Innova CarScan Advisor 5110: Best Bluetooth OBD2 Scanner

5. Launch CRP129E Scan Tool: Best OBD2 Gauge Display

6. Autel MaxiCOM MK808 Scanner: Best Professional OBD2 Scanner

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OBD2 Scanner Buying Guide

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.

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.

What Does An OBD2 Scanner Do?

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:

• Diagnose and perform minor maintenance on your own vehicle
• Perform emissions checks before a state inspection
• Confirm the mileage on a used car before purchase
• Read fault codes yourself to determine the urgency of a check engine light

Beyond that, capabilities can vary greatly. Some common useful OBD2 scanner functions include:

• Steering Angle Sensor (SAS) calibration: All modern vehicles are equipped with power steering systems. If the SAS is improperly calibrated, your vehicle will be difficult to steer and may handle strangely (the wheel turning too easily, or only with difficulty). The SAS typically needs to be reset after any wheel alignment.
• Diesel Particulate Filter (DPF) reset: A diesel particulate filter traps exhaust soot on vehicles with diesel engines. A DPF rest (also called DPF regeneration) is a process where accumulated dust is burned away. If the DPF accumulates too much debris, it can become clogged and lead to engine shutdown.
• Smog test: A smog test measures your engine’s emissions and determines if your emissions systems are working properly. All vehicles in the United States must meet certain emissions standards. You cannot pass inspections by running tests at home, but you can determine beforehand if your vehicle will pass an emissions test.
• Live data graphing: OBD2 scanners may be capable of monitoring any number of car systems. A live graphic function displays this data (such as engine temperature) as a graph in real-time. This function can help diagnose certain engine issues or be used to optimize performance. This feature isn’t something a layperson is likely to find useful.
• Freeze frame data: Some OBD2 scanners can record freeze frame data. This is information about your vehicle’s systems at the time when an error code occurred. Freeze frame data is useful for diagnosing problems.
• Real-time data: Accessing real-time data isn’t necessary for most people. For those with advanced automotive know-how, this information can help optimize engine performance and diagnose certain repairs. In addition to engine information like temperature, RPMs, and fuel injection rate, you can also monitor ABS and battery data.

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.

OBD2 Features: What Experts Are Saying

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.”

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.

OBD2 Scanner Compatibility

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.

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,

“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.”

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.

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.

OBD2 Protocols

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

• ISO 15765 (CAN bus): The most common, used in cars manufactured in the U.S. since 2008.
• ISO14230-4 (KWP2000): Common for cars manufactured in Asia since 2003.
• ISO9141-2: Common for cars manufactured in the EU and Asia, as well as Chrysler vehicles between 2000 and 2004.
• SAE J1850 (VPW): Common among older GM vehicles.
• SAE J1850 (PWM): Common among older Ford vehicles.

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

This page (CSSElectronics.com), includes a more detailed, technical explanation of OBD2 protocols.

Bluetooth OBD2 Scanners

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.

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.

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.

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.

How Much Does An OBD2 Scanner Cost?

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.

OBD2 Scanner Prices

Here’s what you can generally expect with each price range:

• Under $100: You can get a basic, efficient OBD2 scanner for around $60. These devices should recognize a wide range of trouble codes and perform an emissions test. Some scanners in this range may require a subscription for updates. Some Bluetooth OBD2 scanners are in this price range, but these may have hard-to-use apps or require a subscription.
• $100 to $200: Scanners in this range offer a wider range of functionality, such as live data and monitoring of ABS and airbag systems. Many Bluetooth OBD2 scanners fall in this price range. Because a Bluetooth scanner uses your phone’s screen and computer, it can be less expensive than a wired scanner with similar functionality. If you’re an at-home mechanic working on your own car, this is a good price range for an OBD2 scanner.
• Over $200: These OBD2 scanners typically offer a wide range of features, including advanced code reading, SRS, transmission, and ABS monitoring. In this price range, OBD2 scanners should offer accurate live data and include design features like a large touch-screen display. These scanners typically work with a wide variety of manufacturers, even specialty luxury brands, and can include free lifetime updates.

Is It Worth Buying An OBD2 Scanner?

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.

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.

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.

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.

How To Use An OBD2 Scanner

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.

1. Plug it in

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.

2. Turn on the ignition / Start your engine

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.

3. Read and clear 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.

• P: Indicates an issue with the powertrain (the engine, transmission, and fuel system)
• B: Indicates an issue with the body (cabin interior parts such as the steering system, airbags, and seatbelts)
• C: Indicates an issue with the chassis (components underneath the car such as the axles, ABS, wheels, and power steering)
• U: Indicates a network issue (wiring)

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.

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.

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.

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Best Code Reader For Cars: Bottom Line

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.

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.

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. 

Overall, we think these are the top OBD2 scanners in 2024:

1. Best OBD2 Scanner: BlueDriver Bluetooth Pro OBDII Scan Tool
2. Best OBD2 Scanner with Key Programmer: TOPDON ArtiDiag800BT
3. Best Budget OBD2 Scanner: Foxwell NT201
4. Best Bluetooth OBD2 Scanner: Innova CarScan Advisor 5110
5. Best OBD2 Gauge Display: Launch CRP129E Scan Tool
6. Best Professional OBD2 Scanner: Autel MaxiCOM MK808 Scanner

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.

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.

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.

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OBD2 Scanners: FAQ

Below are some common frequently asked questions about OBD2 scanners:

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OBD2 Scanner Reviews: How We Tested

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.

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):

• Speed of fault code retrieval
• Bluetooth capabilities
• SRS and ABS monitoring functions
• Live data functions
• I/M readiness features
• Freeze frame data
• Device interface and buttons

Each diagnostic scanner was given a rating out of 5.0 stars based on ease of use, speed, compatibility, and value.

Ease of Use

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.

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.

Speed

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.

Compatibility

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.

Value

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.

How We Score Products

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:

• 5.0 Stars: A 5.0-star rating means an OBD2 scanner is among the best in a category. It has a large, easy-to-use touchscreen, retrieves codes instantaneously, or is compatible with nearly all vehicles (including luxury and rare brands).
• 4.0 Stars: A 4.0-star rating means an OBD2 scanner performs better-than-average in a category. The interface is intuitive, it can retrieve codes in less than 10 seconds, or is compatible with all the most common vehicle makes and models.
• 3.0 Stars: A 3.0-star rating indicates what is average or typical for an OBD2 scanner, based on our testing experience. It is easy to use once you learn the menus, can retrieve codes in less than 30 seconds, or is compatible with many, but not all, common makes and models.
• 2.0 Stars: A 2.0-star rating indicates the OBD2 scanner performs poorer than average. It is confusing, takes a minute or longer to retrieve codes, and is not compatible with every domestic manufacturer.
• 1.0 Star: A 1.0-star rating indicates that the OBD2 scanner performs well below expectations in a category. It does not work as advertised, displays incorrect fault codes, and is compatible with very few vehicles.

Why Trust Motor1.com

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.

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.

*Data accurate at time of publication. Products subject to availability.

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