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OBD-II Scanner: The Self-diagnostic System for Vehicles

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OBD-II Scanner: The Self-diagnostic System for Vehicles

The OBD2 diagnostic scanner is a great tool to get diagnostic results. It makes analysis depending on the factors shown on the display of the scanner or reader. The diagnostic OBD2 scanner works more effectively than the OBD2 reader does.

It provides you with a fault code with a descriptive meaning. However, the reader device does not show any meaning like the scanner device does. It only shows the fault code and then you have to check a list of codes to get the meaning. So, let’s move forward and get to know the ways to use it properly.

How to Use an OBD-II Scanner?

Turn off your motor vehicle before using an OBD2 scanner. Now, plug in the OBD2 auto-scanner to the motorcar’s data processor connection (generally, it is located underneath the dashboard and near the steering wheel). Once you have plugged-in successfully, turn on the ignition of your vehicle and push read on the auto scientific device. It will take a couple of seconds to display the description on the auto-scanner screen.

The typical scanners only show a code description but some of the OBD2 models tell you what the fact is. The previous case is bothering. You have to look at a code directory for changing the code connotation. You will find the directory in a code handbook, which is located at your particular OBD2 reader.

You will also find it online. Some of the genius readers make their own application software for using. You can download it to your computer so that you can get quick information on your motorcar’s troubles and their best possible fixes.

Most Frequently Asked Questions about OBD-II

What is OBD2 and What Does it Do in a Vehicle?

The OBD2 scanner has an On-Board Diagnostic system (according to revision no.2) and thus, it owns a self-diagnostic operational system. It enables self-maintenance and points out the initial faults authentically. It might be irritating to detect the faults, especially when the driver notices the MIL (Malfunction Illumination Light) Service Engine Soon or the ‘Check Engine’.

This indication will protect your vehicle from costly repairing in future, if you take action immediately. Therefore, this is a great benefit. Initially, the system package and the OBD software were manufactured with a view to lessening air pollution.

It was getting tough to keep pace with the traditional mechanical adjustments according to the Federal regulations. Manufacturers gradually developed the electronic modules to make things easier and applied it to fuel mixture and ignition along with some secondary components.

READ: Helpful Small Space Storage Options You Never Knew About

What does an ‘MIL’, ‘Check Engine’ or ‘Service Engine Soon’ mean?

These terms identify the same thing. All these are warning indicators to warn the driver about malfunction or engine or emission system of his vehicle. Do not take the warning lightly and investigate on the problem before driving anymore.

However, in case the warning is irregular or sporadic, you may omit the indication. If you keep the fault unnoticed for a long time, it may cause serious harm to other components like the catalyst. Try to read out the instrumentation gauges because they can give a more exact indication of fault, especially the coolant temperature.

If you see the ‘Check Engine’ indication, observe the gauges first to find out the problem quickly. The reading of the gauges is very important. If you see any unusual reading on any gauges, there must be something serious. Do not drive any further and stop your vehicle immediately.

What does CAN mean and what are its functions?

CAN is the abbreviated form of Controlled Area Network. It was used on production vehicles in the early 90’s and still progressing. The combination of OBD and CAN system gives more safety and luxurious features. So,  you will get a lot of benefits by using it into the whole system.

There are different modules in the CAN system. The modules are unique for each system and you can combine them to meet your requirements. The entire CAN network communication is shared via a serial data bus.

The introduction of CAN system has made revolutionary changes in automobiles because it has evolved new technologies, which were never imagined before!

‘Check Engine’ lights up every time my vehicle is started. Is this a fault symptom?

Generally, the ‘Check Engine’ light emits for two different reasons. The light will stay if there is a serious fault. However, do not worry if the light goes out soon (the light may stay 1-3 sec highest). Sometimes, the OBD software remains alive and functioning (operates successfully) and serves as a filament bulb and ‘MIL’ circuit test.

However, some of the vehicles may contain a blown bulb or the ‘MIL’ circuit may be damaged. The situation will be worse if the OBD stop communicating. The engine will stop working in that case.


People often get confused about OBD-II Scanner as most of them don’t know how to use it. This is why this piece of writing will help them to get started with this device. So, read out the frequently asked questions if you haven’t read them yet. Use this device accordingly and get amazing diagnostic results! Check out reviews of the best OBD2 Scanner here.

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