05-26-2009, 05:19 PM
I spent some time quality time this weekend working on my Frontier and my wifes X-terra. I did the screen delete, throttle body engine coolant reroute, and I cut the bottom out of both air boxes. My problem is that after all of this both vehicles have the service engine soon lamp lit. when i plug in my engine monitor/code reader I get code p0113 "Intake Air Temperature Sensor Circuit High Input". I cannot reset this code with my code reader which i can normally reset almost any code this way. It also will not reset when i get in the vehicle do the computer reset via the key and accelerator pedal method. This seems kind of strange to to me since i am an elctronics technician and deal with stuff like this all the time, most all electronic devices fail in a "safe mode" ie. open, high resistance so that they do not cause damage to other components in the system, this one says it is a high input code, if the sensor is bad it should read low input by the logic i listed before. I have checked to make sure the sensor is seated properly, and that the wiring is connected. I have checked all of the fuses. I am checking here first in case someone else has had this problem before I bust out an o-scope and start snooping around. Both of the truck will drive, but get really bad gas mileage. Any input will be greatly appreciated.