Buying guide for best OBDII scanners
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Long gone are the days when cars were purely mechanical. Any vehicle that was manufactured in 1996 or later has an onboard diagnostic system made up of a network of sensors that constantly monitor how your car is performing. This network takes the guesswork out of maintenance and repairs. When there is a problem, whether it's big or small, a graphic lights up on the dashboard, notifying the driver.
That graphic doesn't offer any insight into the true nature of the problem, however. To get the specifics, you need an OBDII scanner. This device plugs into your vehicle and displays the data the sensors are transmitting so you know what is going on. The better the scanner, the more specific the data, and the easier it will be to view and understand. An OBDII scanner can save you time and money when it comes to maintenance and repairs.
With so many OBDII scanners available, it can be overwhelming to sift through all the options to find the best. Fortunately, the BestReviews Testing Lab has already done the legwork for you. We tested the Innova 5610 OBDII Bidirectional Scan Tool and found it to be the very best option on the market, thanks to its ease of use and speedy results.
Our list: The best OBDII scanners
Innova 5610 OBDII Bidirectional Scan Tool
If you’re looking for fast results, the Innova 5610 OBDII Bidirectional Scan Tool is the best scanner for identifying potential issues with your vehicle. We conducted a comprehensive test to analyze its efficiency and functionality, including setting it up and running several tests with it.
We found it easy to get started — just plug it into the car and connect to a smartphone via Bluetooth. Running the initial diagnostic test took just under 30 seconds while some other tests we ran took only five seconds, and the results were thorough. Live data monitoring examines a wide range of parameters depending on the vehicle, and you can run several other diagnostic tests, such as battery and alternator tests.
Motopower MP69033 OBD2 Scanner
The Motopower scanner is a bestselling model with many practical features, such as freeze frame and erase code, that you can use to diagnose common vehicle problems. The Crisp LCD provides information in an easy-to-read manner. It has a 2.5-foot cable for convenience as well as six buttons that help you quickly navigate through functions and information. This scanner draws its power directly from your vehicle so you never have to worry about charging.
Actron CP9125 C PocketScan Code Reader
This compact OBD2 scanner fits in the palm of your hand and can be used by experienced mechanics as well as DIY novices. Like all OBD scanners, it is suitable for 1996 and newer models. It also functions with 1994 and 1995 OBD II-compliant vehicles.
To operate, just plug it into your vehicle's dashboard to learn which sensor is generating a code and why. After repairs have been made, the Actron can clean codes and shut off your Check Engine light.
BlueDriver Bluetooth Pro OBDII Scanner
If you like flexibility, the BlueDriver is a great way to go. This Bluetooth device lets you read and clear ABS, Airbag, SRS and TPMS codes. Besides notifying you of a potential problem, it delivers repair reports and reported fixes for nearly every vehicle on the market. This scanner can connect to your iOS or Android device and deliver all information or erase all codes without requiring any cumbersome wires.
Bosch OBD 1000 Diagnostic Vehicle Scanner
The Bosch diagnostic vehicle scanner works on all vehicles sold after 1996 (OBDII and CAN). The convenient design of this compact model lets users plug the device in and quickly scan for codes to find out why the vehicle is displaying a Check Engine light.
Once you make repairs, the scanner can be used to clear the diagnostic codes so the alert lights on your dashboard shut off. The easy-to-read device is powered by your vehicle, so it is always ready to use.
Foxwell NT201 OBD2 Scanner
This model has 10 diagnostic functions. It can read, store and erase codes, depending on your needs. It can also detect cylinder misfires and monitor real-time information such as engine coolant temperature, RPM, short-term fuel trim, long-term fuel trim and more.
The scanner arrives ready to use and requires no registration, updates or battery to operate. Besides American cars, this model is suitable for European vehicles manufactured in 2000 or later, and it offers multilingual menu support.
Ancel BD310 OBD2 Scanner
Ancel packs a lot of features and capabilities into its affordably priced BD310 OBD2 scanner. To help you get the most out of this flexible device, there are several free how-to YouTube videos posted online. These can be easily accessed by searching "AutoFun BD-310."
The versatile design lets you use this scanner as a handheld instrument, or you can transmit data to your Bluetooth-compatible device. It even comes with a heater vent mounting kit so you can use it as an auxiliary screen inside your car if desired.
Autel Scanner MaxiCOM MK808S
If budget is no problem, this model may fit your needs. It is a high-end pro-level scanner that goes beyond the typical engine, emissions and tire pressure diagnostics to test car subsystems such as windows, rear mirrors, sunroof, wipers and more.
This factory-level scanner provides diagnostics for all vehicle systems as well as live monitoring. The newly added Wi-Fi printing feature lets you print a detailed report that highlights the precise nature of the vehicle's problem.
Launch OBD2 Scanner
This updated version of the Launch scanner comes with more functions to better diagnose your vehicle. It helps you quickly pinpoint issues with the engine system, transmission system, ABS system and airbag system. You also get eight services that help solve regular maintenance issues, such as TPMS reset, oil reset and throttle adaption, in seconds. This model has a touchscreen for convenient input, 16 GB of RAM for increased performance and more.
Innova 6030P OBD2 Scanner
The Innova 6030P is designed to make diagnosing your most common automotive problems effortless. It features code severity levels so you immediately know how bad a problem is, and it lets you view key data about your vehicle's performance in real time.
The Innova can perform battery and alternator tests to help pinpoint whether it's the battery or the charging system you should focus on. In short, this model helps you know where to look at a glance to save you time and money on repairs.
Types of OBDII scanners and how they work
OBD is short for “onboard diagnostics.” OBDII is the second version of this hardware. The first version appeared in the early 1980s, but it was limited to certain makes and models. OBDII appeared in the mid-1990s with a universal port that allows one device to scan multiple models of cars. Vehicles from 1996 and newer should be compatible with OBDII scanners.
If you’re shopping for an OBDII scanner for home use, you’ll likely be purchasing a handheld scanner. Professionals in repair shops, however, will want to make use of a computer-sized OBDII scanner. These larger scanners have powerful processors and run fast, allowing you to perform many scans in one day.
Scanners deliver data through several means. Some OBDII scanners are wired: a cable runs from the OBDII port in the vehicle to the scanner, where it delivers data. Other scanners communicate data via a USB, Bluetooth or Wi-Fi connection. You connect this type of scanner with another device, such as a smartphone, tablet or laptop to get your data.
Deciphering scanner information
All OBDII scanners can generate error codes. Understanding what to do with those error codes can be tricky with some scanners, though. High-end scanners show troubleshooting information on the screen along with the error code. This simplifies the process of fixing problems while also saving time.
If the troubleshooting information isn’t displayed on the screen, the device may allow you to connect to the internet to find the data you need.
OBDII scanner features
All handheld OBDII scanners can read basic errors, generating the proper error codes. The scanners can clear error lights, too. If you want a few extra features, here are some items to consider.
Apps
Some OBDII manufacturers create companion apps that accompany the hardware. With an app, your error codes and data can be stored on a smartphone or tablet. The app can also tap into information about error code troubleshooting that’s stored in the cloud.
Connector
The connector on the OBDII scanner has a 16-pin plug. These pins are thin and delicate. If they’re damaged, the scanner will no longer work. Some scanner cables have plastic protectors around the pins, keeping them safe, which is a nice feature. Always store your OBDII scanner carefully to avoid inadvertent damage.
Display screen
A handheld scanner with a large, sharp display screen can show quite a bit of information. Some OBDII scanners have a screen large enough to show both the error code and the troubleshooting information.
I/M Readiness
If you live in a state where your vehicle must undergo regular inspections, you’ll want an OBDII scanner with the I/M feature. I/M, short for inspection and maintenance, can measure the vehicle’s systems to see if they’re ready for inspection testing.
Live data
If you want to measure a system while driving, you’ll need a scanner with the ability to measure live data. Other scanners only work when the vehicle engine is not running.
Storage
If you’d like to remember the results of past scans, look for an OBDII scanner with a memory storage area. This can be helpful for tracking errors as they evolve over time.
VIN retrieval
Certain OBDII scanners display the VIN number of the vehicle after scanning. Reading the scanned VIN allows you to match it with the VIN on your vehicle paperwork. This assures you no one has tampered with the vehicle’s systems or changed the VIN.
Tips for using an OBDII scanner
Connecting an OBDII scanner to a vehicle is an easy process. Reading the codes doesn’t require a lot of technical know-how, either. Still, there are a few things you need to know ahead of time. We’ve compiled some tips to help you succeed with your OBDII scanner.
- Know where to find the OBDII port. Commonly, the port is located beneath the dashboard to the left of the steering column. The port may have a cover or latch. If you cannot find the port, consult the internet. Multiple online sites exist that have the right information for your make and model of vehicle.
- Plug in the scanner gently. Don’t force it. If the scanner and port are lined up properly, it should pop in with minimal force. Using too much force could damage the pins.
- Know how far to turn the key. Some OBDII scanners require you to start and run the car’s engine while scanning. Others require you to turn the key just halfway to activate the vehicle’s power systems.
- Have your data ready. Depending on the scanner, you may need to enter the make and model of your car before the unit begins scanning.
- Plan how you will record the error codes. Once the scan is complete, the codes will appear on the display screen. You can write them down, send them to a smartphone over a wireless connection, or send them to a printer or laptop via USB.
FAQ
Q. How much does an OBDII scanner cost?
A. Basic handheld OBDII scanners can be had for a low price, usually less than $50. These scanners, often referred to as code readers, check for the most basic problems. If you just want to have a bit of information in hand when you visit the repair shop, this type of entry-level OBDII scanner is a good choice. (They can clear error lights, too.) However, an entry-level OBDII scanner won’t provide immediate troubleshooting information.
Mid-range OBDII scanners, which can cost $50 to a little over $100, work nicely for people who like to do some repair work at home. These vehicle scanners have the ability to recall data from past scans, which can be helpful for comparison purposes. Called scan tools, they can diagnose both basic and extensive problems, providing troubleshooting data.
The most expensive OBDII scanners for amateur use cost anywhere from $200 to $1,000. Some pro-level models cost up to $10,000. Expensive OBDII scan devices have the ability to add extra data to the readings. For example, you may see the exact time the error code occurred as well as any other errors that were occurring at the same time. Those who commonly perform auto repairs will want a top-tier OBDII scanner for the best results.
Q. Why would I want an OBDII scanner? After all, I can’t fix my car myself.
A. Having an OBDII scanner at home is helpful even for those who have no experience as a mechanic. By running the scanner, you can find error codes that give you an idea of what’s wrong with the vehicle. You can then make an informed decision about whether the car needs to be taken to a mechanic immediately or if the problem can wait. Additionally, you’ll know whether the repair shop is treating you fairly regarding proposed repairs.
Q. What vehicle problems can an OBDII scanner detect?
A. An OBDII scanner can detect any error code that would trigger a MIL (malfunction indicator lamp) in the vehicle. These lights may include a check engine light, an oil error light, or a battery error light. The purpose of the MIL is to alert you to a problem. By using an OBDII scanner, you can then pinpoint the problem that caused the MIL.
Q. What do the OBDII codes mean?
A. The error code displayed on the OBD2 screen follows a certain pattern. The first character is a letter that signifies the area of the vehicle with the error. “B” signifies a body problem, while “C” signifies a chassis problem. The numbers that make up the remainder of the code further pinpoint the problem. Rather than trying to memorize the codes, OBDII scanners typically display the code’s meaning or connect you with an app that can define the code for you.
