What is OBD2 adapter and how to choose it

Administrator posted this 09 May 2024

In the automotive industry, OBD2 adapters have become an integral part of tuning and diagnostics. These devices, which can connect to various vehicle systems, allow you to read data and perform various functions using modern mobile devices. However, before choosing an adapter, it is important to understand their features.

Connection type

OBD2 adapters are available with various connection types, such as USB, Bluetooth, and Wi-Fi. Each of these options has its own advantages and disadvantages. For example, Bluetooth adapters provide a wireless connection to your smartphone or tablet, allowing you to use them from a distance. On the other hand, USB adapters can be more reliable in terms of connection stability.


A significant criterion when deciding an OBD2 adapter is its operating voltage range. Most adapters are designed to operate in the 8-to 18-volt range, but there are also models that support higher voltages, such as 24-volt and higher. Selecting an adapter with the correct voltage range is influential to ensure stable operation and protect your electronics from damage.

Supported operating systems

One of the key features of OBD2 adapters is their compatibility with various operating systems. Most adapters support the Android and iOS operating systems, but there are also models that can work with Windows. Before purchasing, it is important to make sure that the adapter is compatible with your device's operating system.

Supported protocols

OBD2 adapters are capable of working with various communication protocols, such as ISO 15765-4, ISO 14230-4, ISO 9141-2, J1850 PWM (Ford), J1850 VPW (GM), MS-can (Ford), SW-CAN (GM), etc. Each of these protocols has its own characteristics and is used by different car manufacturers. For example, the J1850 PWM protocol is used by the Ford brand, while the J1850 VPW is used by manufacturers such as GM. Understanding these protocols can help you find an adapter that supports your particular car.

Other features

In addition to the main features, some OBD2 adapters may have additional functions, such as reading error codes, measuring vehicle parameters in real time, tracking routes, and so on. Choosing an adapter with these additional features can further facilitate the process of vehicle diagnostics and monitoring.

Ultimately, selecting the right OBD2 adapter depends on your needs and the specific features of your vehicle. You can make informed choices that suit your needs and budget by understanding the characteristics and functions of adapters. Don't forget to also pay attention to the instructions for using and maintaining certain car models.

Make your car more efficient with the inCarDoc adapter

inCarDoc is one of the leading developers and suppliers of OBD2 adapters and automotive diagnostic software. The inCarDoc Adapter offers a wide range of features, including real-time vehicle parameter reading, engine error detection, fuel efficiency monitoring, and the ability to record and analyse trip data. Thanks to the user-friendly and intuitive software interface, users can easily use all the functions of the adapter to effectively monitor and diagnose their vehicle.