The modern auto industry has regularly surprised with new exciting possibilities, features, better safety characteristics and other attractive innovations. Accordingly, «smart» cars need more complicated diagnostic and maintenance. Many motorists often ask a question – what is a car diagnostic check and why it is so important?

Discover car diagnostics meaning

Computer diagnostics of a car is recommended for comprehensive testing of the vehicle, and in fact all the systems controlled by the ECU. Thanks to the OBD2 standard, the diagnostic process is standardised, so every driver can check the car for errors. At a minimum, you need an adapter and a smartphone.

What does a diagnostic test on a car tell you? In fact, whether all the car systems are working properly, what is its current performance, fuel consumption, and whether all the sensors are reading the information correctly. Using the mobile app and adapter, or at service centres that offer in-depth OBD2 testing, you can detect system error codes. For example, the fault code P0141 means that a defect has been detected in the oxygen sensor heating element on the second sensor of the first can.

What do diagnostic tests check?

Computerised car diagnostics are aimed at checking the electronic and electrical systems of a car. The test detects errors, malfunctions and malfunctions in the engine, chassis, brake system, transmission and electronic control units.

When do you need a car computer diagnostics?

◆ If the ‘Check Engine’ sensor lights up;
◆ To analyse future repairs during the technical inspection;
◆ When buying a used car and checking it out;
◆ If other indicators on the dashboard light up
◆ If fuel consumption has increased;
◆ If the engine performance decreases.

Please note that OBD II standards support most cars made after 1996. If your car is older than 2006, we recommend checking whether it supports OBD2 standards.

What is the difference between professional and DIY diagnostics?

To understand in detail what is an engine diagnostic, we suggest that you understand the difference between a professional approach and diagnostics via a smartphone.

What does a car diagnostic test consist of

1.       Search and detection of diagnostic connector

2.       Scanner connection and reading trouble codes

3.       Interpretation and troubleshooting

The main difference between service checks is access to professional equipment that allows you to check not only general codes, but also manufacturer codes. As we wrote in our other article on DTCs, the number of such codes exceeds 50,000. Some modern mobile apps scan all car systems, not just the engine. However, professional OBD2 diagnostics are really capable of performing a full analysis. This is where the significant differences end, because modern OBD2 apps like inCarDoc check all systems, read engine data during a hands-on inspection, and allow you to clear error codes.

Of course, if the error persists or continues to appear, the driver should contact a specialist.

What does a diagnostic test do for a car

To perform computer diagnostics on your own, you will need ELM327 OBD2 Bluetooth/Wi-Fi adapter and inCarDoc app for iOS or Android.

◆ First, locate the OBD2 connector.
◆ Connect the adapter to the connector and wait for the light on the adapter to turn on.
◆ Switch on Bluetooth or Wi-Fi (depending on the adapter characteristics) on your smartphone
◆ In the inCarDoc settings, also select the appropriate connection type
◆ On the main screen, enter your car data for accurate diagnostics (model, year, engine, etc.). Click the ‘Connect’ button.
◆ When the diagnosis is complete, you can view the detected errors and clear them.

Advantages of computer diagnostic testing

This is undoubtedly a necessary procedure. In addition, there is another advantage - the low cost of computerised vehicle diagnostics. It can prevent costly maintenance and save you money.

◆ Fast fault detection
◆ Accuracy and reliability
◆ Access to hidden errors
◆ Saving time and money
◆ Prevention of future breakdowns
◆ Testing in real time
◆ Resetting errors and adaptations
◆ Check before buying a car
◆ Safe for cars

How long does a computer diagnostic take

Speed is one of the advantages of computer diagnostics. It takes up to 10 minutes to check and clean the car.

Why choose the inCarDoc app for a car diagnostic test?

inCarDoc has paid and free versions. The inCarDoc PRO version offers additional features such as Economiser, customisation of certain parameters and mode 06. The app does not limit its users in resetting errors or diagnostics. We also offer real-time recording of dynamic parameters, but you can view each parameter individually. inCarDoc supports GPS and offers users to search for parking areas, petrol stations, service centres and build economical routes. The application also has a Logbook where you can save diagnostic tests and enter data about car maintenance. To try out inCarDoc, go to the App Store or Play Market to download the app. We hope you now know what a diagnostic on a car does.