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Robert
Robert, UK Car Mechanic
Category: UK Car
Satisfied Customers: 4329
Experience:  Fully qualified / self employed garage technician in the UK
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the malfunction indicator lamp on my daewoo mati stays on.

Resolved Question:

the malfunction indicator lamp on my daewoo mati stays on. what are the possible faults please.
Submitted: 7 years ago.
Category: UK Car
Expert:  Robert replied 7 years ago.
Hi..

Do experiance any problems driving whilst the light is on?
Customer: replied 7 years ago.
DAEWOO MATIZ.the only thing which is different is that the car produces blue exhaust smoke when first starting up.this quickly disappears and goes back to grey. the car has not been used for about 2 weeks before today. no other problems noticeble.
Expert:  Robert replied 7 years ago.
Hi.

Ok. Was hopeing their would be somesort of noticable fault? Because the nothing is being noticed whilst normal driving may mean this fault could be intermit or developing depending which component is causing the fault,hence will make giving exactly what might be your problem difficult to say at present? the ECU should have the fault store within the fault memory "reason light is on" So basically your next step would be to have the car hooked upto a diagnostic machine to retrive the code.Then we will know exactly what will need to be checked or replaced the likely hood being maybe a fualty sensor..You can however before a test is done to check under the bonnet and have a good look around checking all multiplug connections/Leads a vaccum pipes are secure.If nothing is noticable then the test will be the next route.
Customer: replied 7 years ago.
thanks for that. is blue smoke on starting an indication of anything serious?
Expert:  Robert replied 7 years ago.
Hi..

Their could be several reasons ie: Oil condition ie: thinning out and needs replaced if it hasn't been done for a while. Valve stem seals which in a sense would mean the head needing to be removed to carry out the work to replace and can be expensive.Or head gasket fault which should show signs of overheating and oil consumption higher than normal,piston rings excessive blue smoke during all driving conditions.There are however a few additives which can be added to the oil to restore seals etc and most are able to be bought at any local motor factors...So might be worth looking into that once your diagnostic test has been done in relation to the malfunction lamp warning.
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