Direct answer
What happens during diagnostics?
We read the relevant control units and assess active and stored faults, freeze-frame data, mileage, operating conditions and live readings.
Please send the vehicle details, a photo of the warning message and fault codes. Tell us whether power is reduced, the engine judders or the light flashes.
- Read stored faults
- Assess freeze-frame data
- Check live data
- Separate the symptom from the cause