Can anyone tell me how to check what's wrong, what may need to be replaced, and if these codes may be linked to one another?

P0445 Evaporative Emission Control System
P0037 O2 Sensor, Bank 1, Sensor 2
P0418 Secondary Air Injection System
P0412 Secondary Air Switching Valve
P1289 Manufacturer Specific
P1473 Evap System Leak Detection Pump Circuit Open
P0031 O2 Sensor, Bank 1, Sensor 1
P0102 Mass Airflow Sensor Circuit, Low Input
P0135 O2 Sensor Heater Circuit Malfunction

 

I think when your MAF goes bad it throw out a bunch of codes.

Hopefully someone more knowledgeable can help.
I would clean your MAF first with some MAF cleaner .

 

Thanks, I'll try that.

 

I'm going to check/clean the MAF, and check all the systems that threw out codes. I'll also be replacing both O2 sensors, the air filter, and all four spark plugs, as all these parts have exceeded their life expectancy.

Does anyone know what the code P1289 is for?

 

DTC P1289 = Turbocharger bypass valve short to ground

maybe a bad n75

 

"Possible noob question" What's an n75?

 

the boost preasure regulator, it controls how much boost the car should be getting.
it plugs into the intake hose near the bottom. has 2 other rubber hoses coming off of it

 

Have you fixed all the codes you had, the check engine light issue? I have the same problem any advise?

Thanks

 

Secondary O2 sensor reads SAP airflow and reports to the ECU. If it's messed up (and you're showing a code for it), it can throw secondary airflow codes.