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10 Best Auto OBD2 Scanner to Check Car Engine Light, Fault Code Reader, OBD II Diagnostic Scan Tool

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Do you feel like wish you could find out something yourself what was the issue with you auto, car before you go to mechanic?

​Don not panic ​if your check engine light turns on. There are many automotive fault code reader, auto engine scan tools (On-Board Diagnostic 2) on the market ​to help you with troubleshooting and diagnostics. ​Below are comprehensive reviews of ​TEN ​top rated and best OBD2 auto scanners ​you can use very easily without anyone's help.

Top 10 OBD2 auto Scanners - Comparison ​Lists

Last update on 2021-08-10 at 01:14 PST - Details

Last update on 2021-08-10 at 07:03 PST - Details

What is an OBD2 scanner?

The On-Board Diagnostics scanner, commonly known as OBD, is a term used for an automatic system that makes use of the self-diagnosis and reporting capability of a vehicle. Modern OBD implementations use a standardized digital communications port to provide real-time data in addition to a standardized series of diagnostic trouble codes, or DTCs, which allow one to rapidly identify and remedy malfunctions within the vehicle.

These devices can provide the mechanic, as well as, the user a direct insight into the working of the vehicle in order to determine what's wrong with it. These scanners inform their users of the health of the engine, performance rating, and status of several sub-systems inside the vehicle.

The two main models of the introduced OBD devices are OBD-I and OBD-II. The OBD-I proved to be very useful for the mechanics as it helped in running emission systems of the car in a better way.

However, it couldn't determine what was wrong with the car engine in the most efficient of ways. The OBD-II was definitely an improvement on that, performing a basic set of three functions at least. The functions include writing and erasing data and display live charts.

The OBD-II device is connected via the OBD-II port which is inside the vehicle. This port can be located under the dashboard of the car, on the driver's side. The configuration mostly provided by the vehicles are 6-pin, 9-pin, and 16-pin. Depending on the configuration, the connection of the scanner would be different.

The Best OBD2 Scanner Reviews- Top Picks

OBD2 scanners have been helping people diagnose their ill vehicles for years now. It serves as a one stop solution to figure out what’s wrong with your car before you rush it your mechanic, or open it up by yourself.

The two versions available of the scanner include a code reader and an advanced, scan tool. The code readers are only capable of reading and clearing codes, whereas scan tools are also capable of testing, viewing recorded data, and more.

The best obd2 scanners may be difficult to find as there are so many available in the market. Fret not, this extensive guide will help you choose the best one of the lot. It will also provide you with a buying guide and things to look for in an OBD2 scanner. 

ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine is also a error or fault code reader & CAN Diagnostic Scan Tool which is best seller on Amazon. This gadget will help you the time when you need it by saving your money spent on mechanic guy. According to many read and researchm this tool is the hands down.
Cover is included, Works on 12V vehicle battery ONLY, Must be 16 PIN OBD II potocol. To get strated, simply plug into the OBD II port on your car and turn ignition on and you ready to go.
Code Definition Built-in OBD-II DTC lookup library. Shows the code and what the code means directly, don't need to search online. After the code was found, it'll show the definition directly by clicking the error code you selected.
BlueDriver Bluetooth Pro OBDII Scan Tool for iPhone & Android comes second in our ranking.
ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine...
  • Classic design, fast scan and erase trouble codes, even a beginner can use it read the error code, find out what the problem is and perhaps fix it. Save money and time. It can not read and erase ABS,...
  • Works on MOST 1996 US-Based, 2000 EU-Based and Asian cars, and newer OBD II & CAN domestic or import vehicles. Supports English, German, French, Spanish, Finnish, Dutch, Russian and Portuguese.
  • Easily determines the cause of the check engine light. I/M monitor readiness test, turn off the MIL (check engine light) as well as view freeze frame data. Read hard (memory) / pending (intermittent)...
BlueDriver Bluetooth Pro OBDII Scan Tool for iPhone & Android
  • More Codes: To understand the problem with your vehicle you need the complete picture. With an up-to-date modern scan tool, you scan deeper to read, understand, and clear more codes. Access...
  • Real Fixes: Get unlimited vehicle specific Repair Reports, generated from our database of millions of fixes verified by Professional Automotive Technicians. Save time and money.
  • No Cords: All the capabilities of an expensive scan tool (extended vehicle coverage, live data, etc.) combined with the power and convenience of your smartphone or tablet. No cords, no subscriptions,...
Bafx Products - For Android Only - Wireless Bluetooth Obd2...
  • READ & RESET - Our OBD2 diagnostic scanner tool will work on all cars purchased in the USA model year 1996 or newer; Unlike other OBD2 scanners, ours works on ALL OBD2 protocols including J1850 and...
  • REAL TIME - Monitor the diagnostic sensors in your vehicle in real time for things like O2 data, fuel pressure, EVAP system & more; Car reporting an EVAP code? Check your O2 readings to see which...
FIXD OBD2 Professional Bluetooth Scan Tool & Code Reader for...
  • 📱 EASY-TO-USE OBD2 APP & CAR CODE READER - The FIXD car scanner and OBD app instantly translates 7000+ engine fault codes into plain English on your phone. Wireless Bluetooth connection. Set up in...
  • 📱 FIND OUT WHAT’S WRONG WITH YOUR CAR - Even beginners can use the FIXD OBD2 scanner and app to find out what the check engine light means, how serious it is, and possible fixes before going to...
  • 📱 SAVE MONEY & AVOID RIP-OFFS - Walk into the repair shop confident with the accurate info you need to save on car repair. The FIXD car scanner and OBD2 app provides helpful how-to guides and video...
Panlong Bluetooth OBD2 OBDII Car Diagnostic Scanner Check Engine...
  • Read/clear error codes, display their meaning, turn off MIL, show current sensor data, I/M readiness. Find out why check engine light is on before visiting a Mechanic - save money by fixing simple...
  • Support 1996 and newer vehicles 12V light trucks that are OBDII compliant like Acura, Audi, BMW, Buick, Chevrolet, Chrysler, Dodge, Ford, Honda, Hyundai, Jeep, Kia, Lexus, Mazda, Subaru, Suzuki,...
  • Work with Android cellphone and tablet. Compatible Apps on Google Play: Torque, Car Scanner, OBD Auto Doctor…We recommend downloading free version first as there are many other Apps you may be...
Autel MaxiScan MS309 Universal OBD2 Scanner Engine Light Fault...
  • 👍【TURN OFF CHECK ENGINE LIGHT】: Autel MS309 OBDII scanner is an easy-to-use plug-n-play check engine code reader that read and clear codes. This little code scanner retrieves generic (P0, P2,...
  • 👍【FREEZE FRAME DATA FOR ACCURATE DIAGNOSIS】: This MS309 check engine code reader comes with viewing freeze frame function that enables you to retrieve data recorded in the ECU of the condition...
  • 👍【READINESS STATUS TO PASS SMOG CHECK】: The Autel MS309 car diagnostic scanner tool comes with I/M Readiness function to check the operations of the Emission System on OBD2 compliant vehicles....
Autel AutoLink AL319 OBD2 Scanner Automotive Engine Fault Code...
  • [FOR END USER & DIYERS] This error code reader is “plug and play” and comes with an easy interface. Even if you’re not familiar with vehicle repair, you can quickly take control of this code...
  • [TURN OFF CEL] This car diagnostic tool supports Reading DTCs, displaying Live Data, Freeze Frame & I/M Readiness etc to figure out the root cause of the Check Engine Light (CEL) and turning it off,...
  • [EXTENSIVE APPLICATION] Compatible with 7 languages (English, French, Spanish, etc.) and various post-1996 OBD II protocol vehicles (Toyota, Nissan, Honda, Ford, etc.), this OBD II scanner provides...
FOXWELL NT301 OBD2 Scanner Professional Mechanic OBDII Diagnostic...
  • 【Vehicle CEL Doctor】The NT301 obd2 scanner enables you to read DTCs, locate bad O2 sensors, access to emissions readiness status, turn off CEL(check engine light) or MIL, reset monitor, read live...
  • 【Accuracy & Streams】Live data graphing and logging. Accurately read error codes for most Worldwide cars, SUVs, light trucks and 12V diesels equipped with Obd2. Graphing live vehicle sensors data...
  • 【Worthy to Own】Recommended by Mechanic Scotty Kilmer on Youtube. Codes analysis and Printer compatible. Unique PATENTED design, 2.8" color screen, Free Lifetime Update and 1-year seller assurance...
Scanner / Car Code Reader with Live Data
  • Quickly reveal the cause of "Check Engine" light warnings on any 1996 and newer OBD2 car, light truck, SUV and hybrids
  • Read and erase ABS & SRS light trouble codes on most OBD2 vehicles
  • Battery & alternator tests check the performance of a vehicle's charging system
FOXWELL NT201 OBD2 Scanner Check Engine Light Car Code Reader...
  • 🎁【Get One Case】Buy One FOXWELL NT201 OBD2 Scanner, Click extra saving and input code "TU8C5IWL" to get one free case.
  • 【Top OBD2 Scanner】 Recommended by Ezvid Wiki and Onsite Associates Program. Car care and repair can be expensive, especially if you don't know what the issue is.While you can take it to a mechanic...
  • 【One-Click Smog Check】This car scanner with One-Click I/M Readiness key for quick state emissions readiness check and drive cycle verification,test results of your vehicle health status clearly...
Cartman 12V Car Battery Alternator Tester, Test Battery Condition...
  • LED display indicates condition, for 12V battery only.
  • Alternator state check, battery state check, check before charge and overload display.
  • Alternator check : accelerate your engine to 2000 rpm when the green light is lit ,charging circuit is ok.
Schumacher Battery Load Tester and Voltmeter - 100 Amp
  • TRUSTED TESTING: Test load, battery condition, and starter motor draw; 50 Amp load test for 6V batteries and 100 Amp for 12V batteries; tests up to 1000 CCA
  • COMPLETE DIAGNOSIS: Delivers a complete charging system diagnosis for batteries in cars, small trucks, RVs, motorcycles, ATVs, boats, and lawn tractors
  • SIMPLE OPERATION: Top-mounted rocker switch for ease of use and highly visible meter readings

Last update on 2021-08-10 at 09:23 PST - Details

What to look for when making the purchase

While setting out to purchase an OBD II scanner for your car, there are a few considerations you need to take care of. So here are some basic questions that you need to ask yourselves before making the purchase.

​Which cars are OBD2 compatible?

​All cars and light trucks are required to be OBD2 compatible since January 1, 1996. Check around your driver’s seat area for a port, particularly under the dashboard and behind ashtrays. There will also be a notice under the hood, either on a sticker or nameplate that says “OBD II Compliant”. Check this very handy guide to locate the OBD2 port in your vehicle!

Car Code Reader vs OBD scanner Tools

​Car code readers are the simplest diagnostic tool you can purchase. They can effectively read and clear codes from any OBD2 equipped vehicle. However, code readers lack information on manufacturer-specific codes and explanations. obd Scanner tools, on the other hand, offer many more features including access to manufacturer-specific codes, recording and organizing trip data, and providing advanced troubleshooting information for a large database of fault codes.

How to choose best OBD2 scanner?

The best obd2 scanner can be a tricky device to select as a plethora of them are available in the market. Here are a couple of things you must consider before choosing the best one of all.

Do you want a basic scanner or a high-end one?

A low-cost basic code reader has a limited functionality and doesn't do more than reading and erasing engine codes. The code readers mostly have just two buttons to work with. The usually help you determine the things that your mechanic must look into or if you can perform the repair work yourself.

The biggest problem with the basic code readers is that they are not compatible with all the vehicles. They also don't cover all the protocols and are designed to cater to only the most common ones.

A high-end code reader, on the other hand, costs more and is mostly used by professionals. They perform a lot more functions and rarely face any compatibility issues. The added functions may include Airbag capability, live data, Print compatibility, Updatable, Storage, and more.

​Is the device’s software upgrad​able?

Low-cost code readers cannot be upgraded with time. However, the more expensive high-end ones can be updated regularly. This makes them compatible with even the newest of vehicles. But make sure if the updates are free of cost or come with a price tag.

Is it compatible with ​your vehicles?

As mentioned earlier, low-cost code readers aren't compatible with all the vehicles. They only work on the most common OBD2 protocols and therefore, should be checked for the protocols that fit with your car.

You can either look up the protocol your car uses, online or check the Diagnostic connector of your vehicle. You can understand the protocol of your vehicle based on the pins it has.

 For example, if the connector has pins 2, 4, 5, 10, and 16, it responds to the J1850 PWM protocol but if the pin 10 is missing, it responds to the J1850 VPW protocol.

Are you sure of the type of OBD2 scanner you want?

We all look up for an OBD2 scanner, check the types of protocols it's compatible with and buy it without knowing if it serves our purpose best. One should be very sure of the type of OBD2 scanner one wants so that you don't end up getting a PC one when your requirement is that of a handheld. The various types of OBD2 scanners are:

PC scanners: They can be downloaded on your PC and used to diagnose what’s wrong with your car, truck, or bike.

Bluetooth scanners: It can be connected with your smartphone, tablet, or computer via Bluetooth which can then be used for scanning your vehicles.

Handheld scanners: These units are mostly used by professional mechanics and can detect almost every issue in your vehicle. They have better information display, can stream live data, and come in proper kits.

Is it cost effective?

The best OBD2 scanner shouldn't only be filled with features but should also be cost effective. Many times, we buy expensive kits even when our requirement can be fulfilled with a more basic equipment. Therefore, always draw a budget and a list of functions that you want from your OBD2 scanner so as to not spend too much.

Is it easy to use?

​What is warranty if it gives wrong reading tomorrow?

​Where can i find cheapest OBD2 scanner?

Best OBD2 Scanner Buyer Guides

The OBD2 scanner can be a tough find and you must look at the all the possible functions that you want out of it before spending your money. This way, you’ll save a lot of money and won’t have to go to a mechanic every now and then.

Is it portable?

The OBD2 scanners comes in various types like PC, Bluetooth, and handheld. The only ones that allow you some movement are Bluetooth and handheld scanners. You can fix a handheld one under the dash of your car and move around to check everything.

 A portable scanner helps you move around the vehicle to closely observe the problem. It also comes handy on your road trips, so you don’t waste time looking for a mechanic when your car breaks down.

Does it fit your budget?

You might only need a scanner that can read and erase codes or you may need one with a couple of extra features. However, always make sure that you don’t waste your money over special features that you don’t even need. Always list down the features you need in your OBD2 scanner. After that, draw a budget and look for the ones that fit the bill.

Is it compatible with your car?

Many basic code readers only work with a bunch of protocols and thus, aren’t compatible with all the cars. If you’re going for a low-end OBD2 scanner, always check what protocols it works with. But if your scanner is a high end one, chances are quite high that they’ll be compatible with your car. Most OBD2 scanners are compatible with car models dating back to 1996.

Is it compatible with cars made out of US?

Your car may not necessarily be from the US. You may have gotten it transferred from Europe or Asia, which means that its working and protocols might differ. Most budget friendly handheld OBD2 scanners aren’t compatible with cars outside of US. But there are some that can fit this feature. Some code readers can also be used in multiple languages like German, Spanish, Finnish, Dutch, etc.

What all does the kit include?

Most of the times, the kit of an OBD2 scanner includes only the code reader that is to be connected to the car. However, many OBD2 scanners offer the worth of your money by including things like batteries, data cable, etc. along with the scanner. Always try to buy the one with an additional kit so that you don’t end up spending more money than what you aimed for.

Is the scanner updatable?

The low-cost OBD2 scanners rarely offer any updates, which means that you may not be able to use them for the latest car models. Therefore, always go for ones that come with an update-able software so that you don’t end up buying more scanners every time you get a new car. These updates also offer extra features so that your process is easier and results more accurate. The updates, however, may come with an additional cost.

Can you save your readings?

The best OBD2 code readers offer to save your readings so they come in handy even at a later stage. Otherwise, you’ll have to test your vehicle every time to look for the codes you want. Many OBD2 scanners also offer to store the important information about your car so that you can use it every time you have to see a mechanic or buy a part for your model.

Does it work with all the protocols?

The basic code scanners only offer to work with a couple of protocols which are very common. Which is why, they won’t work with every car that’s in the market or even the old ones. Therefore, you must check the protocols of your car if going for a low-end scanner. High-end scanners, however, do not face this issue.

Is it easy to use?

Good OBD2 scanners offer an easy-to-use UI with adequate features to display different values. For example, many OBD2 scanners offer color coded graphs for the live data, they display battery status, voltage information, engine checks, and more. The low-end scanners have just two buttons to use and rarely offer a UI.

Does it have any special features?

Depending on you purpose, you can look out for special features in your OBD2 scanner like a WiFi connection, Bluetooth, data cable, extra hardware, etc. However, the extra features do come with an additional cost that should be a part of your budget before buying.

Best Professional Automatic Diagnostic Scanner - The top benefits

The improved technology has given us better cars, but it has also made the systems a lot more complicated for the users to understand. A lot of times when our cars break down, it gets very difficult for us to diagnose the actual problem with it. We either try to figure it out ourselves and cause more damage than it was before or try to figure out the problem online and spend more money than needed.

This problem has been solved with the introduction of best professional automatic Diagnostic scanner that most repair shops have with them. These tools are designed to tell you exactly what's wrong with your car and give you a better idea of how it can be fixed. The tools also give you a better idea to deal with the issue next time it happens.

The tools also make it impossible for The Mechanic to cheat you as you are able to see the readings of the scanner yourself. Here are the top benefits of the best professional automatic Diagnostic scanner.

Thorough diagnosis of the vehicle

The professional automatic Diagnostic scanners are able to check most of the systems of a car including the ignition system, the fuel injection, the automatic transmission, along with several other smaller parts and systems that seem to be out of your reach. There are sensors that are fit into the scanner that note every single problem with these systems and display it on the tool.

This helps you determine exactly what's wrong with your car and quite precisely so. Every single sensor in the vehicle is designed to acknowledge the Diagnostic scanner and respond to it. This makes one aware of any issues with their car a lot faster so that it can be fixed soon.

Quick scan

The best professional automatic Diagnostic scanners are highly accurate with the readings. The amount of precision they offer with the readings take a lot of time when done manually. Thus, the Diagnostic scanners save a lot of time by displaying the number of issues with your car in a matter of minutes.

These diagnostic scanners are capable of finding problems in one's engine, fuel system, etc. Therefore, you are able to understand everything that's wrong with your car in much less the time than it would take you to figure manually.

User friendly

The professional automatic Diagnostic scanners are extremely easy to use. The tools are quite tiny and fit into your hands. It consists of a screen that displays everything that is wrong with your car and a cable that is connected to the OBD II port of your vehicle.

After the port has been connected to the vehicle, the driver must switch on the vehicle so that the lights and the clock are turned on but not the engine. After that, all you have to do is put in the vehicle identification number (VIN) of your car and proceed to scan it as instructed in the manual.


In the earlier days, the Automatic scanners designed for cars were quite exclusive in nature and specific to the brands they were from. Therefore, they used to be quite expensive as well.

However, with the improvement in technology, all the cars do not follow the same standards, making the professional scanners general in nature. The scanners today can figure out any problem with your car in a matter of minutes.​

This can save you several trips to the garage and the amount of money you will be charged by the mechanics for barely touching your car. This makes the best professional automatic Diagnostic scanners highly economical in the long run.

Standard problem codes

There are several kinds of professional automatic Diagnostic scanners available in the market right now. Some of them show you just the codes, which you may have to figure out later to understand what's actually wrong.

The improve in Technology has also made the systems better by allowing one to see the real-time data of a car without any codes. However, figuring out the codes isn't as difficult either as they are standardized for every single model of every single car company.​

For example, if the code shown on the device is one, there is a problem with the emissions management. The code for emission control is 4 and that for ignition is 3.

Provides peace of mind

Earlier, drivers used to panic as soon as they used to see the glowing "check engine light" on their car's dashboard. The check engine light is turned on in a car only when there is a problem with the PCM (Powertrain Control Module). The PCM starts receiving confusing signals from the other sensors of the car, thus causing the light to blink.

The issue may seem mild at first but can lead to something serious if not taken care of on time. Thus, one can easily check with the help of professional automatic Diagnostic scanner what exactly is wrong and how can it be fixed.

Not only will this save your time, it will also reduce your panic immensely. The professional automatic Diagnostic tool also comes in handy when the car needs to be checked for emission control.

A car isn't allowed to pass the emission test if the check engine light is on. Therefore, always see if everything is right with the car before the inspection.

History of OBD2 Scanner-Need to Know 

Most vehicle owners these days prefer having an OBD2 scanner as it saves them a lot of time and money. An OBD2 scanner can figure out what's wrong with your vehicle way before a mechanic sees it, thus helping you understand whether you can repair it yourself.

It also comes in handy in determining what kind of work your car needs so that the mechanic doesn't overcharge you. If you're thinking of buying an OBD2 scanner, here a brief history of how the devices came to be.

OBD2 Scanner

California was the first state that started thinking about the harmful emissions produced by the vehicle and the impact it would have on the environment. In 1966, all the car models were required to have an emission management system in the car, in the state of California. The decision spread across the states and was enforced nationwide by the federal government in 1968.

The first OBD system on a computer that could scan a vehicle was produced by Volkswagen in the year 1968. Ten years later, Datsun worked to better the system and make it a lot simpler. They produced an OBD system that had limited but non-standardized capabilities. The engine diagnostics of a vehicle did not come into the picture until the 1980s.

GM too produces an engine diagnostic tool of themselves, supported by the flashing of check engine light. After that, several car companies went on to develop similar interfaces. This happened because the vehicles had still not been standardized, giving the manufacturers an opportunity to create tools that were different for various brands, as well as, for different car models of the same brand.

This made it very difficult for the user to understand issues as they had to be clear of the custom codes created by every manufacturer for each of their models.

However, OBD has undergone some of the most complex changes in the history of diagnostic devices, from barely declaring emissions to giving live data graphs of the vehicle. The previous OBD tools provided nothing more than an indication of the check engine light, but are now able to give detailed information about every single thing that might be present in your car.

The OBD-II scanners make use of a digital port connected under the dashboard to quickly analyze the car and collect all the data about it. It is then able to produce a set of standardized codes indicating to the exact problem the vehicle might have.

All the mechanics and most drivers are aware of these codes and therefore, can start working on a problem without wasting any time. Thus, if all you need to do is tighten a plug, you won't have to waste your time going to a mechanic. If you require something major to be done, your mechanic would be able to assist you better and give you the value for your money.

Timeline of OBD standards

Following is the short timeline of how OBD scanners came to be and how their standards evolved over the years.

1988 – This was the year when Society of Automotive Engineers (SAE) declared the use of a standard set of connectors and diagnostics. This helped every driver who had to remember the custom codes designed for vehicles of different brands, sometimes the same one but different models.

1991 – OBD-I diagnostics was made mandatory to be present in every car in the state of California.

1994 – The state of California declared that all vehicles produced after 1996 must follow the standard produced by the SAE. Thus, all the OBD produced after this point were referred to as OBD-II. This included a series of standard codes so that all the cars could be tested for their emissions, regardless of the company they come from.

1996 – OBD-II became a mandatory standard for all the vehicles produced in the United States after that.

What are the problems still faced by OBD-II scanner owners?

The only problem that still remains is choosing the right tools for your car. The OBD-II scanners vary a lot on the price scale and provide adequate functionality for their price. Thus, it is very important to be aware of the brand and model of your car, what kind of scanner you must need, and what all functions do you want out of it.

There are several people who just need a portable device that makes it easy for them to walk around the car and capture all the readings. They might need scanners with a long data cable. Some of them require to see the live data, and most mechanics use a PC-based OBD scanners as they can scan the whole vehicle at one go without having to move at all.

Final Verdict

For us, the best OBD2 scanner has to be the 

ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool

​The device comes in an anti-shock and anti-slip packaging and has cleared the drop test of 5 ft. The kit also comes with an extra 5ft data cable that can be connected with the car for diagnosis.

The AD310 scanner lets you view real-time "Live Data", this information includes value (volts, rpm, temperature, speed etc.) and system status information (open loop, closed loop, fuel system status, etc.) which were generated by the various vehicle sensors, switches and actuators.

It hardly requires any battery and offers a user friendly UI. Not only does it offer multiple languages but is also compatible with cars from the US, Europe, and Asia. The features include reading and erasing the errors, graphing live data, battery indicators, voltage readings, and more.

We also think​ this is High Return on Investment - Potential Big Money Saver

According to Wayne Torres - Saved me a trip to the mechanic AND payed for itself in one use!

​References -

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