Book a Car Diagnostic in Great Ormond Street Hospital

The duration of a diagnostic check depends on the complexity of the fault.

Yes. Engine diagnostics are designed to identify the fault codes that trigger a check engine light. Once the codes have been retrieved, the mechanic can investigate the underlying cause and recommend any necessary repairs.

Diagnostic equipment can identify many electronic and sensor-related issues, but not every fault will generate a fault code. Some mechanical problems may require additional inspections, testing or manual diagnosis to determine the exact cause.

After the diagnostic check, the mechanic will explain the findings, discuss any fault codes detected and recommend the next steps. If repairs are required, you’ll receive advice on the work needed before any further action is taken.

Yes, fault codes can usually be cleared once the underlying issue has been resolved. Simply clearing codes without repairing the fault is not recommended, as warning lights and fault codes will often return if the problem remains.

The mobile mechanics in our network diagnose most makes and models, including petrol, diesel, hybrid and many light commercial vehicles. If you’re unsure whether your vehicle can be diagnosed, get in touch and we’ll be happy to confirm compatibility.

Yes. Many faults develop gradually and may not immediately affect the way the vehicle drives. A diagnostic check can identify hidden issues early, helping to prevent more serious problems, unexpected breakdowns and costly repairs in the future.