Sunfire L4-138 2.3L DOHC VIN D MFI (1995)
Intake Air Temperature (IAT) Sensor: Testing and Inspection
SCAN TOOL TESTING
A scan tool displays the temperature of the air entering the engine, which should be close to ambient air temperature when engine is cold, and rise
as underhood temperature increases. If the engine has not been run for several hours (overnight), the ECT and IAT temperatures should be close to
each other. A fault in the IAT sensor circuit should set either a DTC P0112 or DTC P0113. This DTC charts also contain a chart to check for
sensor resistance values relative to temperature.
