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?

 

This is a stock 99 Lx? You've done no recent maintenance, nor modifications...either electrical or mechanical?

 

Everything is stock except for the catback exhaust. I always do regular maintenance, I just took it in today to change the fuel filter. Every mechanic I have taken it to has not been able to tell me whats wrong.

 

How many miles?

And you're saying nothing was wrong with the car, then one day you decide to unplug the MAP "just to test it" (even though you should keep it plugged in, since you need to supply it with voltage before it spits one back at you) and then you forget to plug it back in, go start the car and boom - both codes appear? Anything else you unplugged "just to test"?

 

Dont ASSume anything if you dont know the whole story, because the only person that looks like an *** is U not ME. I never said nothing was wrong with my car, Ive just been trying to figure out whats wrong wit my car and I wanted to test my MAP sensor so I could rule out the possibility. I only wanted to know why my IAT sensor came up with a code. But dont worry ***, I figured out my problem.