Blog Layout

What Issues Can Engine Diagnostics Uncover?

3 January 2025

Modern vehicles are complex machines, with engines relying on advanced systems to function efficiently. When problems arise, engine diagnostics provide an essential service to identify the root cause. 


Here at Williams Technicians we offer mobile engine diagnostics across the North West and help drivers get back on the road quickly and safely. But what exactly can engine diagnostics uncover?


Faulty Sensors and Wiring Problems

One of the most common issues uncovered by engine diagnostics is faults with sensors or wiring. Modern engines rely on sensors to monitor everything from oxygen levels to engine temperature. A malfunctioning sensor or a broken wire can cause performance problems or even prevent the vehicle from starting.


With roadside diagnostics, we can quickly assess these faults using specialised equipment, saving you the hassle of towing your car to a garage.


Misfires and Fuel Efficiency Issues

Misfires occur when an engine’s cylinder fails to ignite properly, leading to poor performance, increased emissions, and reduced fuel efficiency. Engine diagnostics can pinpoint whether the misfire is caused by a faulty spark plug, fuel injector, or ignition coil.


Emission System Problems

Vehicles are designed to meet strict emission standards, and a fault in the exhaust system can trigger warning lights on your dashboard. Diagnostics can identify problems such as a faulty catalytic converter or an issue with the exhaust gas recirculation (EGR) valve.


If you’re on the road and encounter such a problem, mobile engine diagnostics can detect the fault quickly, ensuring you stay compliant with emissions regulations.


Overheating and Cooling System Issues

Engine overheating is a serious issue that can cause long-term damage if not addressed promptly. Diagnostics can reveal if the problem lies in the thermostat, radiator, or coolant system. With roadside diagnostics, we can help diagnose and fix overheating problems before they escalate.



Ignition and Starting Problems

If your car struggles to start, the problem may stem from the ignition system. Diagnostics can check the condition of components like the starter motor, alternator, and battery. Our mobile services allow for quick intervention, even if the issue arises while you’re on the road.


Engine Diagnostics From Williams Technicians


Engine diagnostics are an invaluable tool for identifying and resolving vehicle problems efficiently. Whether you’re dealing with a dashboard warning light or performance issues, Williams Technicians offer reliable mobile engine diagnostics and roadside diagnostics across the North West.


Don’t let engine troubles disrupt your journey—
contact Williams Technicians today to book a professional diagnostic service and keep your car running smoothly.


24 March 2025
Limp home mode protects your vehicle whilst allowing you to get to safety and seek repairs - read on to find out more about how this function works.
25 February 2025
Need car repairs? Compare mobile mechanics and traditional garages for convenience, emergency roadside assistance, and car repairs in the North West.
31 January 2025
Discover how mobile engine diagnostics can quickly identify car issues and get you back on the road. Explore the benefits in this helpful guide.
3 December 2024
If you’re experiencing issues with your car, it can be tempting to attempt to repair it yourself. Learn the dangers of doing so in this expert guide.
22 October 2024
Discover essential information about AdBlue repair services, common AdBlue faults, and how Williams Technicians can help as your trusted car mechanic.
25 September 2024
Calling out a mobile mechanic can be more convenient and affordable than going to a traditional garage - read on to find out about the services on offer.
21 August 2024
Williams Technicians explains the potential issues an engine diagnostics test can uncover, how they affect your vehicle and why timely repairs are crucial.
5 August 2024
Discover the top reasons drivers need roadside assistance in 2024. Learn about common car issues and how to be prepared for unexpected breakdowns.
12 July 2024
Discover essential tips for hiring a mobile electrician for cars. Learn about the mobile electrician services available from Williams Technicians.
7 June 2024
Mobile car mechanics can offer a flexible, affordable repair service, but it is important to do your research before making your choice - read on for more.
Share by: