Hello! My daughters Mitsubishi Lancers service engine light just came on. We just did an oil change two weeks ago (we did it according to mileage). I already checked the gas cap but just wonder if it comes on to tell us to change the oil. The car attendant did not note anything when we were there two weeks ago and she barely drives it. THanks.
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Re: Service engine light
Light came on due to the engine computer pick up a bad signal from one of your engine sensors, will have to get a code reading to know what's going on, most auto parts will do this service for free or some one like autozone, have it done and get back with us with the code number, so we can help you with your trouble code.
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The oil light will come on if there is no oil or very little oil in the engine. You say you had the oil changed a week ago. Check the oil plug in the engine pan and see if it is very loose or missing.and leaking oil Also check the oil filter to see if it is loose and leaking oil. If you changed the oil using a company then you could have a complaint with them if something is loose or missing. If you changed it yourself you may have to say its a learning experience. Hope you never drove very far with no oil your engine just might be ok.
Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the Check Engine or Service Engine Soon lights to tell you that there is a problem and you should have the car diagnosed and repaired. Not fluid related, but could be a small problem that's easy to fix now. Even a loose gas cap can turn the light on. Have a code scan, that's the starting point.
If it is the service engine light, go to Auto Zone and they will put a scanner on it for free and diagnose the code. I may have fixed the same problem with my daughter's 2004 Dodge Stratus 2.7L V-6 a few months ago. Is it the "Oil Pressure Light" or the service engine light? My daughter's car had a sporadic low oil pressure light. Checking the actual oil pressure is more work, so I guessed it was the Oil Pressure sending unit and it was. When I took it off it the electrical connection was soaked in oil due to some internal failure. I put a new oil pressure sending unit on and the oil pressure light has not come back on.
If you remove the wire connector and there is no oil on anything, try sparying it with electrical parts cleaner and putting it back together. If the oil light is still on you will need to replace the sending unit.
It is an easy job, but it must be done from the underside of the engine in a tight space. Make sure the enginer is cool because the sending unit is close to the exhaust. There is an aluminum heat shield with three (3) bolts that needs to be removed and is most of the work. You will need to plug the hole with a clean rag or wait for the next oil change to do the job and replace it after you drain the oil.
If the easy steps above do not solve the problem then you may have bigger trouble like a bad oil pump, or worse yet, a really worn out engine that needs a rebuild.
Just last week, I has a SEL scanned at Auto Zone and it turned out to be the Engine Coolant Temperatuere Sensor. I removed the electrical connection and sprayed it with electric parts cleaner and put it back together. No light since then. Good Luck!