Do it yourself OBD diagnostics monitor to detect errors or faults in your vehicle

Cars have evolved a lot, especially in the last four decades. Gone are the days of carbureted engines and now the OBD or the onboard diagnostic system is the industry standard. The system is like an information center of the ECM(electronic control module) of your vehicle that read-outs vital information in the form of live data and error codes. With OBD diagnostic tools easily available in the market these days, you can self-diagnose your vehicle, and it can save you a lot of money. You can either fix your vehicle yourself or be vigilant enough not to be fooled by a mechanic. Let us learn some important aspects related to DIY OBD2 diagnostic.

“OBDII_Port” by InfoCog is licensed under CC BY-NC 2.0

How does the OBD system work?

OBD or the ‘onboard diagnostics system’ is a term used in the automotive sector that refers to the capability of a vehicle to self-diagnose and report the fault to the user of the vehicle. The current OBD-II standard was implemented in the USA in 1996, in the wake of stricter emission norms, and slowly it became an industry-standard world over. The amount of diagnostic information relayed through OBD has improved a lot since its introduction in the early 1980s. Modern OBD systems use a standardized digital communications port to provide real-time data that can help you to diagnose your car and save a lot of time. So for example, if your vehicle has a faulty sensor, like an O2 sensor, then the real-time data will tell you the exact problem, and you can fix your vehicle with much less diagnostic time.

How can you use OBD tools to fix your car?

Diagnosing a problem in a vehicle can be problematic, and it can be troublesome if you do not have proper mechanical skills. But certain problems can be self-diagnosed. With the use of the OBD scanner tool, you can communicate with your vehicle and proceed with fixing the problem. The OBD displays information in terms of codes that are based on the automotive industry standard of the world. Just plug the tool into the OBD port and read the displayed code. You can then know the meaning of the code with a simple google search, and you can also find a solution. For example, the P0131 code means a bad O2 sensor, and you can then replace it or get it replaced by a mechanic. DIY obd2 diagnostic can also save your money from cheating mechanics as you already know the problem.

Limitations of self OBD based repairs

Most of the OBD tools that are available in the market are very basic and can only provide some simple data readout. As cars have evolved electronically, you need bigger and more expensive OBD tools to talk with different car modules. Sometimes the car brand has proprietary OBD tools such as VAS for VW cars and that can only be accessed through a car dealer. Otherwise, too, you can only diagnose and repair simple problems. Many complicated problems that require competent knowledge, reading live data, etc should be best left to the professionals. There is also a fear of misdiagnosis, and sometimes the user simply erases the codes without actually fixing the problem. This is also a bad practice and can harm your vehicle. 


In the world of the internet, where a ton of information are available at your disposal, the do-it-yourself culture has picked up, and fixing cars yourself is not an exception. You can self-diagnose our vehicle with an OBD tool or do a DIY obd2 diagnostic, that is easily available online, and fix your car. Or you can be vigilant enough to know the problem beforehand and not to be fooled by a car mechanic. But if you have an expensive and complicated vehicle, then you should avoid it unless you know what you are doing with it. 

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