Engine management light
The engine management light on my 2002 Rover 25 1396cc is on all of the time, even though I have cleaned all of the earth points. I have read that this is now an MOT failure. C Lawrence The MOT test was revised in May this year and now involves items being marked as Minor, Major or Dangerous. A malfunction indicator lamp (MIL) which either stays on or does not operate will be classed as a Major defect and cause the vehicle to fail the test. As your Rover is petrol and built after 2001, it will be Eobd-compliant. To discover why the MIL is on you will need to read the codes from the ECU. You can either ask a garage to do this for you or buy a cheap code reader. Something like the Foxwell NT200 Diagnostic Scan Tool at £38.95 from this website https://bit.
ly/1c1jsu8 should be all that is needed. Once you know which component is registering a code and triggering the light, it will be easier to rectify.