Possible Causes

WARNING: This page is about a different car, the 2002 Nissan Xterra and 2002 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.

Malfunction is detected when:

DTC P0112 Or DTC P0113

An excessively low or high voltage from IAT sensor is sent to ECM.

DTC P0127

Rationally incorrect voltage from IAT sensor is sent to ECM, compared with voltage signal from ECT sensor.

Possible causes are:

IAT sensor circuit open or shorted.
Defective IAT sensor.