A warning light needs context
An engine warning light can be caused by emissions, sensors, ignition, fuel, air, wiring or other system issues. The symptoms and fault codes need to be considered together.
What diagnostics can show
Professional diagnostic equipment can read supported fault codes, review relevant live data and check modules where the vehicle allows communication. This helps identify the next sensible step.
Fault codes are not automatic repairs
A code may point to a system or circuit, but it does not always prove which part is faulty. Some faults need further electrical, mechanical or road testing.
What to send before booking
Send your registration, postcode, warning lights shown, symptoms, whether the car drives normally and when the light appeared. This helps decide whether a mobile diagnostic visit is suitable.