Malfunction Indicator Light ON + wrench sign

Hi all,
This is probably a simple question...
The orange Malfunction Indicator Light / Check Engine Light came on, and I can also see a wrench sign on the dispaly, where the mileage is shown with the minus sign. ( something like "-250 and wrench sign")
I thought this is because the oil filter and oil change is due, so I did the oil and filter change anyway, but the light and the wrench sign are still there.

Any suggestions? Do I have to do a more complex service?
 
Back
Top