Fiat Grande Punto 2011 1.4 8V: Addressing P0016, P0101 Errors, Camshaft Sensor Issues & More

Good day.
I have another little problem with my Fiat. Grande Punto 2011 1.4 8V with factory LPG. Mileage 220 thousand I bought it and immediately to the mechanic to replace all consumables and timing gear. By the way, somehow the engine computer was burned, which was successfully repaired. The car from the very beginning worked unevenly at idle, after adventures with "friendly mechanics" somehow did not go. Everyone thought it was a bad timing matter. Another mechanic dismantled the engine and stated that the exhaust valves were to be replaced. Apparently burnt from gas. In fact, after its repair, the engine walked properly. However, now that it got colder I get an error. The car drives, suddenly goes out and the yellow triangle and yellow engine badge on the clocks. After firing he goes on but he is so silent. After clearing the error, the car drives normally again. I have connected a diagnostic interface that shows the following errors:

P0101 - Leaks in the air intake system - discontinuous
P0016 - Camshaft sensor - discontinuous
P0106 - Pressure sensor - discontinuous
P0172 - Mix too lean - present
P0171 - Mix too lean - present


P0016 - What I can change / check myself is e.g. Camshaft sensor. Only is he at the bottom next to this gear or at the top? And are the camshaft and camshaft the same? Again at the top is the timing phase sensor but is it the same thing?

P0106 - The second thing is the pressure sensor but is it an oil pressure sensor? It is not expensive, I can also replace it.

As for P0172 and P0171, two messages, i.e. a lean mixture on two cylinders? Could it be due to poorly regulated gas?

Thank you in advance for any hints

Error 101,106,171,172 is caused by one fault, you need to attach P0106, i.e. the sensor on the intake manifold, or look for leaks in the inlet, mix error (171i 172) you have just because of the inlet leak or damage to this sensor (check the pins in the plug).
Error P0016 is a camshaft error (lack of synchronization with the shaft. Causes: damage to one of the shaft or shaft sensors, damage to the wiring harness, damage to the ECU, wrongly set timing. I would start by checking the electrical system because something was often found out there, someone would check camshaft features match, if everything is ok it will clear errors run on gasoline and check for errors LPG only after removing the faults.

It turned out that: after the 1st incorrectly set valve timing, supposedly instead of 1 for the 4th cylinder. after 2. spartolone connection of some pressure sensor, not connected where it is needed. Gazownik has overwhelmed everything and there are some mechanics like us: /