Engine management light on but car drives fine — should I worry?

A steady (not flashing) engine management light usually means a non-urgent fault — often an O2 sensor, EVAP leak, or minor misfire. You can drive the car short distances safely, but get it scanned within a week. A flashing EML means stop driving — usually a serious misfire that will damage the catalytic converter.

The amber engine icon on your dash is the most misunderstood warning in modern cars. Here's what it actually means and when you should panic.

How much does it cost to diagnose an engine light UK? — £40–£90 at an independent garage. Avoid main dealers for diagnostics — they usually charge £120+.

Will the engine light fail my MOT? — Yes — since 2018, an illuminated EML is an automatic MOT fail in the UK.

Can I clear the engine light myself? — Yes with a £20 OBD scanner, but if the underlying fault isn't fixed it'll come back within 50 miles.

Bob's Mechanical Repairs — independent family-run garage in Birnam, Dunkeld, Perthshire. Call 01350 727 276 or email bob@bobsmechanicalrepairs.co.uk.