Car Diagnostics

From engine light warnings to electrical faults, expert car diagnostics in our Hornsby workshop can quickly identify the cause so the right repairs can follow.

Modern vehicles rely on advanced electronic systems, and when something goes wrong the first step is an accurate diagnosis. The Matt Gates Automotive team uses professional diagnostic scanners to detect faults across your vehicle’s engine, transmission, electrical and emissions systems. A car diagnostic test helps pinpoint the cause of problems so repairs can be carried out efficiently and correctly.

What Is a Car Diagnostic Test?

A car diagnostic test involves connecting your vehicle to professional OBD-II scanning equipment to read live data and fault codes from the vehicle’s control modules. This process identifies faults that may not be visible during a visual inspection, helping to find problems early and prevent more serious repairs.

When Should You Get a Diagnostic Test?

It’s recommended to book a diagnostic test whenever the engine light or other warning lights appear on your dashboard. Diagnostics are also useful if you notice performance issues such as rough idling, poor fuel economy, stalling, or unusual noises. Regular diagnostic checks can be part of preventative maintenance to keep your car running smoothly.

Matt Gates Automotive - Who we are

We use dealer-level diagnostic equipment to monitor live data and read fault codes across every system, giving you results you can rely on.

What a Diagnostic Test Covers

Our diagnostic service checks a wide range of systems, including:

The check engine light on your dashboard can represent hundreds of different possible faults. A professional scan can identify issues so the correct repair can be carried out without guesswork. This detailed scan gives our Hornsby mechanics a clear picture of your vehicle’s health so they can recommend the right repairs and next steps.

Why Choose Matt Gates Automotive?

Qualified
care

Every service is conducted by trained, experienced mechanics.

Transparent
communication

You get plain‑English updates, clear quotes, and no hidden extras, no jargon, just facts.

Flexible
convenience

Ask about courtesy cars, pick-up/drop‑off options — availability permitting.

Support for
all makes
Experienced with European, hybrid, and local models. We adapt to your vehicle’s specific needs.

Car Brands We Service

Matt Gates Automotive services many car makes and models from local Australian brands to luxury European labels and a huge range of 4WD makers. 

We Work On

Frequently Asked Questions

A car diagnostic test connects your vehicle to specialised scanning equipment that reads fault codes and live data from its electronic control modules. This reveals issues in the engine, transmission, electrical or safety systems that may not be visible during a regular inspection.

You should arrange a diagnostic test as soon as a warning light such as the check engine light appears on your dashboard. It is also recommended if you notice reduced performance, strange noises, stalling, or other unusual behaviour in your car.

Most diagnostic tests take between 30 minutes to an hour, depending on the type of fault and how many systems need to be checked. If additional investigation is required, we will explain what’s involved and how long it will take.

A diagnostic scan can detect problems with your engine, transmission, emissions system, ABS brakes, airbags, and many other electrical or electronic components. It provides a clear starting point for accurate repairs.

No, diagnostics identify the fault but do not repair it. The scan provides us with fault codes and data, which we then use to recommend the necessary repairs or maintenance to resolve the issue.

Yes, after carrying out diagnostics we provide a clear explanation of the results, including any fault codes found and what they mean. We also outline the repair options available so you can make an informed decision.

Other Services

Let Matt Gates Automotive take care of all of your motoring maintenance. 

Contact Us

We would love to speak with you. Fill out the online form and our team will contact you within 24 hours!

Phone

02 8921 9004

SMS

0403 549 214

Send Message