mechanics.tradeEngine warning light
Testers wrote engine warning light down 535,874 times during 2025, 20th on a list of 265 kinds of defect.
535,874recorded in 2025
1.7%of all recorded defects
20thon the national list
What it is
The orange engine symbol on your dashboard must light when you turn the key and then go out. If it stays on, or never comes on at all, it is a fault either way.
What the tester can write down
| Wording on the certificate | Category | Recorded in 2025 |
|---|---|---|
| Engine MIL illuminated indicating a malfunction | Major | 535,874 |
What you can do about it
The light is a messenger, so the answer is to read the code behind it rather than to clear it. Many garages will plug in and read the code for a small charge or no charge at all.
Nearby on the list
Every defect on the list, from 42,728,066 MOT tests in 2025.