Home » What is the OBD2 CAN protocol? -Explained in a simple way

What is the OBD2 CAN protocol? -Explained in a simple way

OBD2 CAN protocolIf you’re new to this world of OBD, then you might not know what the OBD2 CAN protocol is. This is a parameter of the monitor related to the emission of the ECU and follows the guidelines of CRAB. This guideline not only gives you data storage but also gives you data accessibility for external scan tools. There are many support systems containing this OBD, like K-line, CAN, etc. The most useful system is the CAN or Control Area Network. It is used to communicate with other devices, like the phone. And this handles protocol. After 2008, it became mandatory to contain all cars under this CAN protocol. Nissan also has this protocol.

What is the CAN protocol used for?

Can buses be mainly used as a communication tool? The CAN protocol can be used to run five protocols of the OBD2 system. So this means OBD2 is a diagnostic system, and this second generation is used in every corner of the world. But OBD2 and CAN are mainly used in cars for communication purposes. But both of these protocols have identical connectors. That’s J196. That’s why many people get confused about this protocol. But OBD and CAN are different from each other.

What are the five common OBD2 CAN protocols?

When you inspect any old car, you will notice four protocols in OBD. Actually, this is the basis of the OBD2 scanner. The pinouts of this OBD2 scanner so that it can be helpful to determine which protocol is used in your car:

ISO 15765 (CAN bus): mandatory in US cars since 2008, is today used in the vast majority of cars.

ISO14230-4 (KWP2000): The Keyword Protocol 2000 was a common protocol for 2003+ cars in, e.g., Asia.

ISO 9141-2: Used in EU, Chrysler & Asian cars in 2000-04

SAE J1850 (VPW): Mostly found in older GM vehicles

SAE J1850 (PWM): Found primarily in older Ford vehicles

OBD2 and CAN BUS have a converter that can easily transfer the information and also vice-versa. This converter is a CAN signal converter that converts the signal so it can fit into the OBD 2 socket. This also provides helpful data by extracting and converting engine data from the vehicle’s CAN bus network. Both are very different things for every car. Both are used for communication reasons. As I said, both are used for different purposes, so it’s very important for every car.

Hi, I am Henry, the owner of this website. If you are a DIY car enthusiast like me and are looking for an all-purpose OBD2 scanner, you’ve come to the right place. With 5+ years of experience in the automobile industry, I have in-depth knowledge about most of the OBD2 scanners regarding their software versions, firmware, features, updates, and compatibility. I love reviewing these gadgets after using and testing them personally. As a result, I always try to provide my honest opinion on the overall product quality.


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