The Ultimate Guide to Car Diagnostics

The Ultimate Guide to Car Diagnostics

A diagnostics test is one of the most important services we offer at Wyatt Auto Services. The test is critical for maintaining the safety of your vehicle and preventing the breakdown of key components. This article will explain everything you need to know about a car diagnostics test.

old style car driving through woods

What is a car diagnostics test?

A car diagnostics test involves the dissection of data on your car’s onboard computers to identify any issues. This is achieved by connecting advanced computer equipment to your car’s computing system. 

Your vehicle may be suffering from a faulty component that has not yet grown severe enough to impact your driving experience. A car diagnostics test will be able to identify minor issues that may not otherwise have been picked up during a general assessment. Once identified, we’ll be able to fix the problem and prevent it from becoming a hazardous, and typically more costly, problem.

vehicle and car daignostics

How do car diagnostics work?

Every modern car contains a number of onboard computers, the most familiar and central being the engine control unit. These computers work in tandem with the sensors and electronic devices of your vehicles to accurately monitor, control and record the status of individual components. Some of the most important data include:

  • Emission levels
  • Engine temperature
  • Transmission status


They also report data on performance issues with components such as:

  • Fuel injector
  • Airflow
  • Coolant
  • Ignition coils
  • Throttle


During a car diagnostics test, our technicians can view a wealth of data pertaining to the status and history of your vehicle. Using their years of experience and knowledge, our technicians will identify any issues with your vehicle and construct a suitable solution. 

car diagnostics

How long do car diagnostics take?

A car diagnostics test typically takes around 60 minutes to complete, though further work may be required depending on the issues that are identified.


How much do car diagnostics cost?

The car diagnostics test itself will be charged at a fixed price. Further costs may apply, depending on the subsequent work needed to resolve any identified issues. Here at Wyatt Auto Services, we pride ourselves on our transparency and customer service; we always discuss with our customers our findings, the next steps and the costs involved before any work is undertaken.

How accurate are vehicle diagnostics?

Diagnostics tools are available at a range of price points. Those of the highest quality offer the most accurate diagnostics compared to cheaper models. Here at Wyatt Auto Services, we use top-of-the-range equipment to ensure all the data we extract is accurate. 

It’s also important to note that no vehicle diagnostic equipment can do 100% of the work. A full analysis requires experienced technicians to interpret the data and construct a suitable solution based on their findings. Our technicians have many years of experience performing vehicle diagnostics tests and guarantee to service your car to the highest standards.


Wyatt Auto Services are proud to offer car diagnostic tests to our customers throughout Barnsley in South Yorkshire. We pride ourselves on our honest and reliable service, and we always aim to get you back on the road in a safe and legal vehicle. In addition to our vehicle diagnostics, we also offer a range of car and vehicle services, including MOT checks and tests. If you’d like to enquire about any of our services, get in contact with us today or visit our autocentre.


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