Engine might be a noob question but here it goes

Here is a thread that addresses 96 and 66 if you scroll down in it. Since you are new here, I’ll let you know the search function works well, unlike FB. I found this thread and many others with the search for “code 66 96”.
Code 96 - The fuel pump relay/circuit code is common. If the car is priming for 10 seconds with the key on, but not started or running yet, and it is timing fine, do not worry about it.
Code 66 is about the MAF. @jrichker has a help post there you probably really need.

jdaj said:

great sticky but that seems to be for engine running codes. so if i get code 11 with koeo im good and code 11 with koer im good ? what about the 2 codes i have in memory ? code 96 and 66

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Clear the codes, drive the car a week or two and see if they come back.

How to clear codes.
Clearing the codes by pressing a button on the scan tool or disconnecting the test jumper used to start the code dump does not erase the “learned settings”. All it does is erase the stored codes in memory.

You must clear the codes anytime you replace any sensor. The following tells you how and is different from the method above
Clear the computer codes by disconnecting the battery negative terminal and turn the headlights on. Turn the headlights off and reconnect the all sensors including the MAF and anything else you may have disconnected. Then reconnect the battery negative cable.. This clears all spurious codes may have been generated while troubleshooting problems. It also clears the adaptive settings that the computer "learns" as it operates. Clearing the codes does not fix the code problems, it just gives you a clean slate to start recording what the computer sees happening.

Run the car for at least 30 minutes of driving and dump the codes again to assure that you have fixed the code problem or sensor problem. This is necessary for the computer to relearn the adaptive settings that the computer uses for proper operation. The engine may run rough at first, but should smooth out as it runs for the 15-20 minute learning period.