UPDATE ON P2279 Issue (Possible fix)

[Retali]

Hello guys, CBZ 1.2 105hp engine here.

For those who do not remember three years ago i have run to P2279 and P1155 issues , after 15 garages telling me to change the turbocharger - i did not, thoroughly searched online and found
that the problem was the plug of the G71 sensor (on the manifold) . You can check my previous topic.

Anyway two years later and the last 10 months , my car begun to throw fault codes the most consistent was P2279 (air intake loss) . As before i did a pressure test, a smoke test, etc
There was no visible air loss in the system. This time i was more worried because along with P2279 i would get Turbocharger overboost OR underboost fault codes AND the P1155 reappeared. And i would feel a lot of misfires
happening after cold start. Almost at the same time the car was having difficulty to start. Especially after long hours of parking.

I went to an electrician and had him to solder the plug of the G71 (manifold) sensor i had crimped 2 years ago. The P1155 dissappeared.

The P2279 was happening every day, every drive .

So i decided to replace the whole manifold, found a used one with everything on it (sensor, cooler, solenoid for cooler, o rings etc) , changed it by myself.
Regarding the no start issue, i checked the battery (that i have changed almost 2 years ago) and the battery's health was really bad and couldnt hold charge.
The electrician reaffirmed my multimeter test that the alternator was ok and there was actually no parasitic drain.
So i changed the battery.

I would drive everyday with limp mode btw, but i did not want to change the turbocharger because i could feel it was not the problem. The car would some times drive like an F1 and suddenly it wouldnt.
The car despite the battery change would still have trouble to start. And one day it didnt . So i hit the starter motor and the car started.
Obviously it was a starter motor going bad, i would hit the damn thing every next day to start my day. Unti one day it didnt. That was 3 days ago.

I had the garage replace it with a new bosch one, since i couldnt lift the car to reach the bottom screw and the car would crank again like a tiger.

AND I HAVE NOT HAD A P2279 FAULT SINCE A CHANGED THE STARTER MOTOR. And i know you might think "its too early to jumb to conclusions" but as i said, i would get everyday-everydrive p2279 fault, for 500 meters or 15 km drives it didnt matter, every i was driving in limp mode.
So i want your opinions, wth possibly happened ! I was erasing the fault codes etc.
How could a bad starter motor cause a p2279 issue ? I thought the starter just starts the car and thats it.
Is it an ECU problem ? Or the ecu harness (that has the g71 and starter motor plugs ) is kapputt ?But if that is the case wouldnt the fault code reappear.

Could a starter affect the ignition, so the start to put it simply is not good in electricity terms therefore the sparkplugs and coils run to issues that lead to less power therefore the ECU has no choise but to blame it on air loss ?