The 10 Best Car Diagnostic Tools  May 2019

OBD2 scanners can be handheld (which are either standard or professional), connected directly to the vehicle, or can be small, mobile, device-based scanners that use mobile apps to read the data collected. Below is a short description of each type of OBD2 scanners for you to compare:

Basic OBD2 Handheld Scanners: Cost effective and simple to use, basic OBD2 scanners are able to read and erase engine codes. Ideal for reading codes to double check mechanic’s work or for diagnosing problems to carry out simple repairs, basic OBD2 scanners are best suited for common vehicle models.

Professional OBD2 Handheld Scanners: Professional OBD2 scanners offer more compatibility and programing options. With a lot of units offering additional functions as well as internal storage memory, users are able to retrieve things such as the VIN number, print results, and make adjustments easily.

Mobile Device-Based OBD2 Scanners: These small scanners read the data from the on-board diagnostics of the vehicle and then display the results through an app loaded onto a smartphone or tablet. These scanners are small and cost effective as they don’t have onboard screens.

Based on all the consumers' reviews we've scanned, these are the top things they mentioned about their new stuff:

1. Instructions: Quality OBD2 scanners that come with good clear instructions, as well as accessible customer support, are rated much higher than those units that don’t. Each scanner is different and so is each type of vehicle, therefore clear instructions save users a lot of initial frustration.
2. Screens: OBD2 scanners that include backlit LCD screens get good reviews as their owners feel they are easier to see and read. Screen functions that allow more data in the viewfinder such as displaying the code description as well as the code are popular choices and well received.
3. Compatibility: The most important reviewing point among consumers is the compatibility of OBD2 scanners with the test vehicles. This includes all functions and software included in the scanner such as ABS functions.
4. Features: Some features are noted by OBD2 owners as adding more function for their money, and these include freeze frame info, live data view, data recording, and non-continuous text features. These owners in general are more satisfied with their scanners than others and these features come highly recommended.

• The first thing to consider when choosing your OBD2 is compatibility. To do this, you will need to check under your hood for your vehicle’s protocol label and then ensure your scanner will be compatible with your vehicle's protocol.
• Look for a OBD2 that offers internal storage and therefore saves data. This will allow you to view it after the road test when you are safely in your garage or workshop.
• To ensure your OBD2 is always up to date, opt for a professional model that offers updateable scantools. This will save on buying a new unit when you update your vehicle.
• Additional functions worth investing in when buying your OBD2 scanner include ABS or Airbag capability, which will allow you to read and reset systems, on screen definitions, which don’t just display the code but also describe what it means, a print function to be able to print the necessary data, a live data function that will allow you to view engine performance in real time, and a retrieve VIN feature which will show you the vehicle identification number, which is particularly useful when buying and selling cars to ensure the VIN hasn’t been tampered with.
• OBD2 detection codes will either be displayed with or without their definitions, depending on the type of OBD2 you purchase.
• OBD2 scanners have five possible protocols, and normally a vehicle is compatible with one of these five. To ensure your scanner is effective, make sure that the scanner you buy has protocols that match those of the vehicle you will scan.
• The screen is an important consideration when purchasing your OBD2 scanner. For the most easy reading, LCD screen scanners normally offer better viewing and more viewing options.

Innova: A leading manufacturer of testing equipment and diagnostic reporting, Innova Electronics Corporation is a world-renowned brand in the automotive industry.

Autel: Autel manufactures and supplies professional diagnostic tools, equipment and accessories to consumers and the automotive industry.

ScanTool.Net: ScanTool.Net was founded in 2001 with the aim to make an affordable personal scan tool that was sophisticated and easy to use.

Actron: Founded in 1964, Actron are known in the vehicle repair market for their quality diagnostic tools and electronic testers.