Engine Diagnostics
When warning lights appear or your vehicle is not performing as it should, professional engine diagnostics in Frome can help uncover the root cause quickly and accurately. At Treads Vehicle Services Limited, we use advanced vehicle diagnostic equipment to pinpoint faults across modern vehicle systems, helping drivers avoid unnecessary repairs and get back on the road with confidence.
Request A Diagnostic Assessment
Need advice about a warning light or vehicle fault?
Call 01373 464450 or email [email protected] to speak directly with our team.


Modern vehicles rely on sophisticated electronic systems to control everything from engine performance and fuel efficiency to emissions and safety features. When something goes wrong, dashboard warning lights often provide the first indication that a fault has been detected.
Our vehicle diagnostics service connects directly to your vehicle’s onboard systems, allowing our technicians to retrieve fault codes, analyse live performance data and investigate the underlying cause of the problem.
Unlike basic code readers, professional diagnostics involve interpreting the information correctly and carrying out further testing where necessary. This helps ensure faults are accurately diagnosed rather than simply replacing parts based on assumptions.
Many customers contact us after searching for car diagnostics when they experience:
Where repairs are required, we can often carry out the necessary work through our specialist car repairs service and wider mechanical repairs department.




A professional diagnostic inspection can uncover faults across multiple vehicle systems.
Engine Management Faults
Issues affecting fuel delivery, ignition systems, sensors, emissions control systems and engine performance can often be identified through diagnostic testing.
For related engine warning light concerns, visit our dedicated engine management service.
Electrical System Faults
Modern vehicles contain numerous electronic control units. Diagnostic testing can identify faults affecting wiring, sensors, modules and communication systems.
Our auto electrics specialists can investigate and repair many electrical issues identified during testing.
Emission Control Problems
Faults affecting emissions systems such as EGR valves, DPF systems, oxygen sensors and catalytic converters can often trigger dashboard warning lights and reduced performance.
Government guidance on vehicle emissions and MOT requirements can be found via the official DVSA MOT information service.
Performance & Efficiency Issues
If your vehicle feels sluggish, consumes more fuel than normal or does not respond as expected, diagnostics can help identify hidden issues affecting performance.


Many vehicle faults begin as relatively minor issues before developing into more expensive repairs.
By arranging diagnostic testing early, drivers can often benefit from:
Diagnostic testing is particularly valuable before arranging an MOT inspection or routine car servicing appointment.


Initial Fault Assessment
We discuss the symptoms you have noticed, including warning lights, unusual noises, performance concerns or intermittent faults.
Electronic System Scan
Advanced diagnostic equipment is connected to your vehicle to retrieve fault codes and system data.
Technical Investigation
Our technicians analyse the information and carry out further testing where necessary to identify the root cause.
Clear Repair Recommendations
We explain our findings in straightforward language and provide honest advice regarding any repairs required.
Fault Resolution & Verification
Where authorised, we complete the repair work and confirm that the fault has been resolved correctly.
Diagnostic testing is particularly valuable before arranging an MOT inspection or routine car servicing appointment.


Dashboard warning lights should never be ignored. Many indicate faults that can worsen if left unresolved.
We regularly diagnose:
The official Government MOT guidance explains why dashboard warning lights can affect MOT outcomes.
If a warning light appears alongside steering, braking or suspension concerns, our specialist teams can also assist with:
Replacing parts without confirming the underlying cause of a fault can quickly become expensive.
Professional diagnostics provide evidence-based fault-finding, helping identify the real issue before repairs begin. This reduces wasted expenditure and helps ensure repairs are completed the first time correctly.
Our approach focuses on identifying root causes rather than simply clearing fault codes or replacing components unnecessarily.
This commitment to honest advice and transparent service is one reason many local drivers continue to choose Treads Vehicle Services for vehicle diagnostics, repairs and maintenance.
Our workshop supports motorists from:
Whether you have a warning light, performance issue or unexplained fault, our experienced team can help identify the cause and recommend the most appropriate solution.
A diagnostic inspection involves connecting specialist equipment to your vehicle, retrieving fault codes, analysing system data and investigating potential faults.
This depends on the complexity of the fault. Initial scans are often completed quickly, although deeper investigations may require additional testing.
No. Diagnostics identify the fault. Once the issue has been confirmed, repairs can then be carried out where required.
No. Warning lights often indicate developing problems that can become more serious if left unresolved.
In many cases, yes. Stored fault codes and live vehicle data can provide valuable information even when faults are not constantly present.
Yes. Our technicians are experienced in diagnosing faults across modern petrol, diesel, hybrid and electric vehicle systems.
If your vehicle is displaying a warning light, suffering from poor performance or showing signs of an underlying fault, Treads Vehicle Services can help. Our experienced technicians use advanced diagnostic technology to identify issues accurately, explain them clearly and recommend the most effective solution.
Protect your vehicle, avoid unnecessary repairs and gain peace of mind with professional fault-finding from a trusted local garage.
Treads Vehicle Services
5c Handlemaker Road
Frome
Somerset
BA11 4RW
01373 464450
| Monday | 08:30 - 17:30 |
|---|---|
| Tuesday | 08:30 - 17:30 |
| Wednesday | 08:30 - 17:30 |
| Thursday | 08:30 - 17:30 |
| Friday | 08:30 - 17:30 |
| Saturday | 09:00 - 13:00 |
| Sunday | Closed |














