Engine Diagnostics

At Onyx Autocentre, we have invested in both the latest equipment and in staff training to ensure that we are the go-to garage for engine diagnostics in Slough.

Bring your car into our workshop and with our top-of-the-range diagnostic software, we can pinpoint the source of problems quickly and accurately, getting you back on the road with the minimum of fuss.

What can engine diagnostics be used for?

Vehicle diagnostics are a powerful tool for identifying and addressing problems such as engine misfires, starter motor failures, spark plug issues, rough idling and many other problems that can occur in your vehicle. Here’s how diagnostics testing at Onyx Autocentre can help resolve some of these issues:

  1. Misfires

Diagnostic tools read error codes from the engine control unit (ECU) to pinpoint which cylinder is misfiring. They also monitor fuel delivery, air intake, and ignition systems. Repairs may include replacing faulty spark plugs, ignition coils, or fuel injectors, or addressing air-fuel ratio imbalances.

  1. Starter Motor Failures

The system checks the battery voltage, starter relay, and motor functionality through live data analysis and system checks. Solutions might involve replacing the starter motor, repairing faulty wiring, or addressing battery issues.

  1. Spark Plug Issues

Misfires, poor ignition timing, or weak spark signals are identified through ECU error codes and inspection tools. Replacing worn-out spark plugs, adjusting the gap, or repairing ignition coils can resolve these issues.

  1. Rough Idling

Live data from the ECU reveals irregularities in idle speed, fuel pressure, or air intake, while fault codes identify components causing the problem. Repairs might include cleaning or replacing the throttle body, addressing vacuum leaks, adjusting idle control valves, or repairing damaged sensors.

Why Choose Onyx Autocentre for Diagnostic Testing in Slough?

We’ve invested heavily in the latest diagnostic software and we’ve ensured that all our staff are trained and confident using it. We can provide precise insights, saving you time and money by identifying the root causes of issues first time. This ensures targeted repairs, prevents further damage, and restores smooth, reliable engine performance efficiently.

A popular and well-respected independent garage in Slough, Onyx Autocentre caters for all your vehicle repair and servicing needs.

To find out more about Engine Diagnostics in Slough, contact us online or call us directly on 01753 439115

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Our Location

Find Us

Deseronto Trading Estate
St Mary's Road
Slough
Berkshire
SL3 7EW
01753 439115

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Opening Times

Monday 10:00 - 18:00
Tuesday 10:00 - 18:00
Wednesday 10:00 - 18:00
Thursday 10:00 - 18:00
Friday 10:00 - 18:00
Saturday 10:00 - 15:00
Sunday Closed
All services by appointment only

© Onyx Autocentre - 2025