my IAT sensor throws a CEL whenever it's cold, in the fall it wasn't bad cause if the car would run just for a few minutes and i turned it off and back on then it would be gone cause it would be warm enough, but in the winter it isn't so easy up here in North Dakota. if i drive my car for awhile around town or whatever i can turn it off and turn it back on with no CEL and it'll usually stay off around town but once i hit the highway and all that cold air comes in then it comes back on again...... i've unplugged the ECU to reset it and it seemed like it helped at first but then the CEL came back... i'm thinkin i'll just have to get a new sensor but i'm the only kid in my town that owns a civic so that's kinda hard to try someone else's first.... any input would be nice... thanks

 

I had the same problem too, I cleaned off the IAT sensor and everything is fine. Try cleaning it, if it doesn't work just replace it.

 

cleaning it as in take it out and clean off the actual sensor or just clean where the wiring harness is connected?

 

any other opinions on this CEL or does everyone agree with cleaning and sensor and if that doesn't work then try/get another one?

 

bump for answer 'cause i'm having the same problem.