When the error code P0113 is triggered, it indicates that the powertrain control module (PCM) has received a higher voltage signal than expected from the intake air temperature (IAT) sensor, indicating a problem with the IAT sensor 1 or its circuit. The PCM monitors air intake temperature by sending a stable 5-volts to the IAT sensor. This sensor, in turn, uses a thermistor to measure the intake air temperature. If the temperature remains normal, the thermistor will have some resistance meaning the output voltage to the PCM will be below 5 volts. A P0113 OBD-II trouble code is triggered when the voltage signal to the PCM is higher. This particular trouble code is most often associated with P0111, P0112, and P0114 codes.