Crank but no start, codes P0204, P0300, P0304 and P0401

I told them it started and it stayed running with starting fluid but in their mind, you just need a new motor. It's leaking oil, and said it has low compression (I think they said 160 cylinder #1 /165 #2 /200's on 3 and 4) which I think is baloney. I had to force the mechanic over the phone to check anything fuel related, but only hunch it they just didn't bother. They needed that commission sale.

So car is at shop and finally got back to me after a week. States compression was good and was able to start under own power but shaky until rpm's go up. States possible code for I hector's #3 and 4 on atomization being bad (possible). They want to change all injectors but can't guarantee will fix issue. Want to charge about $1,700.00, so I'm just going to bring back home and try to fix myself. Check and or clean injectors and or even valves due to this darn GDI now that I have time on my hands. Once I get it here, I might need your expertise guidance on this.

Decided to pull the intake manifold to see if injectors were dirty or I can test.

Injectors look pretty clogged.

Well well, look what I discovered? Oil soaked plug at rear of block right where I cleaned. Can this possibly be crank sensor?

It's a connector with a red safety tab and is mounted on a bracket on driver side rear and looks like a brake booster hose running next to it. The plug is routed going somewhere below the exhaust manifold.

Seems to be the oil pressure control valve plug. That plug had a lot of oil in the plug. I might consider changing just for the heck of it but have to remove the catalytic converter to get to that sensor. It's just above the oil filter.

So got it going and runs sweet as before. Cleaned intake, valves, injectors and connectors that had oil. No one had that oil pressure switch so just had to roll the dice and cleaned.

Thanks for your help and guidance. You are my hero.

Took back to shop to clear and check codes and p0192, p0203 and p0204 cannot be removed. Shop says to run 2 or 3 bottles of fuel injection cleaner to clean out. But they say overall, it runs great. Hmm.

Hope you doing great yourself. I had just got laid off due to the covid slowdown and this $12.00 repair vs. $12,000.00 saved my rear.