There are many kinds of OBD diagnostic tools being sold in the market now. Today we mainly introduce two cheap and portable OBD diagnostic tools, which are also the two products most buyers will buy. One is the classic ELM 327 and the other is the code reader card.
The first one to introduce is the classic ELM 327, this one is the explosive product, since the sale of countless buyers like, the blue is the most classic, this product is not functional, connected to the car's OBD interface, you need to connect the phone, download the software on the phone to run. Because of the different ways of connection also derived from a number of products, roughly is the Bluetooth, and Wi-Fi and USB, generally speaking, people will buy the wireless style, because compared to the use of computers, cell phones will be more convenient, can be detected at any time and anywhere.
The other one is Auto Coder Reader & Scanner Tool, this kind of product does not need to connect with cell phone, the product comes with a small screen, when one end of the OBD interface plugged into the car, can work. These products have buttons, you can select the function you want through up and down keys to read the data of the car, some products support printing function, which needs to print the diagnosis result of the car through the external printing device. Some of these products will have some shortcut keys, you can quickly diagnose through the shortcut keys.
