Cruze started overheating intermittently (no shock). Past couple weeks I’ve been driving it’s bounced up to the mid point instead of a notch below where it usually sits, then would go back down, and periodically continue doing that. Today, drove over an hour with no issues until I was about home & it actually started overheating to the point it turned my ac off. I pulled off, didn’t turn the car off yet, and it bounced right back down to the notch below the mid point. Turned the car off for awhile, turned it back on to get home & now every time I drive it’ll bounce around. Sit normal, start overheating, bounce back to normal & start overheating again. I’m getting it checked out tomorrow, just want some ideas as to what it could be before then/things I could check out. I’ve also been hearing a humming sound when it starts to overheat so I’m wondering if it could be the radiator fan going out? Idk. Thanks in advance.

2014 1.4 LT Turbo

Car Turns On. idles at 800-900RPM. Gives LOTS of codes. i removed the intake manifold during maintenance and unplugged the Battery first then the MAF, MAP, Coolant Temp Sensor, Boost Solenoid, Boost Pressure Sensor, Both Cam Sensors And o2 sensor.
Now it’s giving codes

P00EA, P0236, P0237, P0238, P2227, P0135, P0131, P0068.

While Driving and i accel fast my dash says:

Engine Power Reduced
Service Traction Control
Service Stabilitrak

Then goes completely limp until i restart the car

While going uphill i have to push to 6000RPM just to make it up a hill.

WTAF is going on :(

I recently replaced my valve cover gasket, and it’s already coming weird in some spots, but I didn’t use any locktite so I know for a fact some of the screws have gone loose.

I’m going to re-do it with a felpro gasket and locktite. Is there a specific kind I need to be using?