Hello there & Welcome to ja.com!
As your engine management light is coming on - this is indicating that the cars computer (ecu) has logged faults in the engine management systems - What needs to be done now is to have those faults read from the ecu - which will point to the area of the fault that is causing problems...
It is not a service - due light -- it is a fault light.
You need to have the car put on a diagnostic computer - have a look in your local yellow pages - or similar, for a garage or a mobile diagnostician - that has the suitable equipment to do this for you - many have - it doesn't have to be a dealer - and this will likely be much cheaper for you ;)
This could really be anything from a simple sensor fault to the main ECU having gone faulty -- any other way than the above would be pure guesswork which you just can't do these days - and its a very expensive method!
The connection to a diagnostic computer is the only way forward for you to effect a sure cure ;)
As a basic DIY thing -- all you can really do - and it may be worth it - is check around every wire connector you can find in the engine bay - and give it a wiggle and a slight tug --- just to see if its something really silly , like a bad connection that you could cure yourself... Very often though - even when the fault that put the light on is cured, very often the car needs teh diagnostic computer to re set the ECU - and switch the light off... but as I say... it may be worth a try.
Sometimes too -- people have success , disconnecting the cars battery for half an hour , which sometimes has the effect of re setting the ecu fault memory and canceling the light.... These thoughts are very much DIY - but if none of it works - then its the computer job Im afraid..
Bear in mind that if you do disconnect the battery , you will lose all settings like , radio, telephone etc etc.... and this would all need re setting again...
Kind Rgds, MIKE
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UK Car Mechanic
Hi, I am a Car/ vehicle mechanic of some 32 years. 25of -running my own repair/diagnostic business.