My car was loosing power and when they open the engine they've found that on of the piston (4) has a whole and they on top but now its not cranking
The repair and your current problem might not be related and perhaps not even the spanner light is related.
If the repair was only a short time ago you should give the repairer a call in the first instance in case the problem is related.
An engine piston does not develop a hole for no reason. Pistons are strong and reliable and something else must have happened, something fairly serious, to have caused a hole.
Either the ingress of foreign matter due to bad or incorrect maintenance, something within the engine broke or maybe serious overheating within the cylinder occurred.
Replacing the piston without discovering what caused the trouble in the first place (and curing it) would be a very bad repair.
If it was serious overheating that caused the hole, the overheating could have been caused by preignition or a faulty engine management system and in that case your present problem might be connected to the original cause, though your current problem could be a faulty starter motor or immobiliser.
To discover the exact meaning of the spanner light you should read your vehicle handbook.
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