P0125 Generic Insufficient Coolant Temp For Closed Loop Fuel Control
any idea what that means?

i'm not exactly for sure. but i think there is a clog or maybe someone bypassed your throttle body coolant lines. either way it has something to do with the coolant lines that are supposed to be hooked into your throttle body on the bottom and front of the part. probably a leak or something. take your intake off and check to see if you have coolant in your throttle body. also check to see if your coolant lines are connected properly.

the coolant level was extremely low. so i filled it up now. think that'll fix the problem?

i'm not for certain, take your car into autozone and have then scan your OBD code again. once they get the code they can print off a check list of possible problems and offer solutions. also they can price you the parts needed to fix whatever the code tests on. it might just be that your coolant was super low, but that is just guessing.

take it to the auto parts store and have them give you the options of what you need to test.