407 1.6 diesel non cycle take off

Hello 407 I have a 1.6 diesel vehicle, there was a noise from the chain, the mechanic changed the chain, he said the pins were worn, he changed them, there was no fault in the vehicle until that time, the departure was superb, then the flow sensor was changed, the pressure sensor changed, the turbo solenoid was changed, but it did not. Then they said the turbo will be cleaned. Then the error started to appear as “defective fault. Then I looked, the oil was reduced, I changed the oil friends, I put 5/40 oil, I put the original oil, I am now kidurum.

First of all, welcome to us. If the problem arose after the procedure, your master should solve it, sir. The tool sente setting may not be set properly. Well, I looked at the catalyst. Does the vehicle give a fault code.