Alright, I got a 99 Civic LX and im getting these two codes: P0108 MAP Sensor Circuit high input & P0113 IAT Sensor High Input. Whats going wrong that would cause this to happen. I dont know much electrical, so does it mean I need to replace the sensors or is something else causing this to happen? I Disconnected the MAP sensor just to test it and forgot to plug it back in when I turned on the car. I did not disconnect the IAT Sensor though, so why did that code come up?

 

it could be that the sensors are bad, or it could be that there is a short in the wireharness that is making the output look high to the ecu, use a repair manual, and test both the sensors and the harness, and make sure they are within spec.