Kindly take it to a competent computer diagnosis and the problem will be displayed and fixed accurately.
I took my fielder recently and what the roco makanica could not fix (displaying engine light) was done within minutes- it was just a worn out sensor.
Unfortunately, all those old fashioned mechanics will be phased out if they don't invest in learning the new technology. Fortunately to us, all mechanical problems are stored in the cars computer.
Lets not be vague, we go to hague