Po502 chevy malibu

There are plenty of online website where you can look up codes. What codes are you getting I may be able to help?

Check out the videos on the power steering. See if there is a local college near you that does automotive classes and ask if they can fix your car for practice?

https://www.google.com/search?q=2011+chevy+Malibu+and+the+power+steering+is+going+out+along+with+the+ESC

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Do you know what a code diagnostic flow chart is ? You need to look the code up in a service info. repair manual an do the diagnostic's associated with that code. Test circuit wiring , view scan data etc.....
DTC P0410 Secondary Air Injection (AIR) System

Video's on youtube showing how to diagnose this .

You erase the engine light by fixing the problem . With every DTC - diagnostic trouble code there are diagnostic flow chart's , steps to find the problem .

DTC P0442 : Evaporative Emission (EVAP) System Small Leak Detected

How to Diagnose P0442 Small Evap Leak 04 Chevy Avalanche

Need the year and engine size.

What makes you think this is a anti-theft system problem ? Is the security light lit on the insturment cluster ? When you turn the key to start does the starter spin the engine ? Crank no start ! Or when you turn the key to the start position the starter does nothing . No crank no start . A aftermarket remote start won't by pass anti-theft system . Your best bet would be to take to a qualified repair shop and have it checked for DTC'S - diagnostic trouble codes . Before you let someone start hacking up wiring circuits .
DTC B2947
DTC B2948
DTC B2957
DTC B2958
DTC B2960
DTC B3031
DTC B3033
DTC P1626
DTC P1630
DTC P1631
DTC P1632

Do you know what DTC'S are , these would point to an area of trouble an to a fix .

BEFORE ANY THING. CK YOUR CABLES TO THE PCM. TAKE THEM OUT AND PUT THEM BACK IN. ALSO, MAKE SURE MASS AIR FLOW CONNECTIONS ARE TIGHT.

where can I find the P1665 Evap vent solenoid control circuit on my 99 Malibu?

both codes refer to the throttle position sensor, the sensor is at the throttle plate, on the side of the throttle body. to test remove the connector to sensor, use a ohms meter to test. put 1 lead to top connection and the other to the bottom one. move throttle and the needles on the ohms meter should move very even, move throttle slow to get a good reading, needle should move without no hesitation, if the test is bad replace tps sensor. if the sensor gets to bad, it can have an effect on transmission shifting. after fixing sensor have the light turned of with an obd2 scanner.

P0816, Downshift Switch Circuit, PCM, TCM, DTC P0816 (2.2L and 3.5L) for the 4T45-E transmission or DTC P0816 for the 4T65-E transaxle. ...