High Air Temperature

[camaro_speedemon]

My car just threw a high intake temp code. Does anyone know what could have caused this? I have an A/F ratio gauge and had noticed its not going past stoich green even at WOT. It used to go all the way to stoich orange. I did a quick visual check of my MAP sensor and made sure it was connected and not loose. Is that the right sensor I need to check, and do you have any other suggestions on what I should check or what could be causing this?

[camaro_speedemon]

I just realized I put this in the wrong section, Mods, could you move it for me?

[Gmtech1005]

DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
Refer to A/C Pressure, TP, MAP, ECT, IAT Sensors .

Circuit Description
The intake air temperature (IAT) sensor is a thermistor which measures the temperature of the air entering the engine. The PCM applies 5 volts through a pull-up resistor to the IAT sensor. When the intake air is cold, the sensor resistance is high and the PCM will monitor a high signal voltage on the IAT signal circuit. If the intake air is warm, the sensor resistance is lower causing the PCM to monitor a lower voltage. DTC P0112 will set when the PCM detects an excessively low signal voltage on the intake air temperature sensor signal circuit.

Conditions for Setting the DTC
No ECT sensor or VSS DTCs present
The engine has been running for over 10 seconds.
Vehicle speed is greater than or equal to 25 mph.
IAT signal voltage indicates an intake air temperature greater than 130°C (266°F).
The above conditions are present for at least 20 seconds.
Action Taken When the DTC Sets
The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store conditions which were present when the DTC set as Freeze Frame and Failure Records data.
Conditions for Clearing the MIL/DTC
The PCM will turn OFF the MIL during the third consecutive trip in which the diagnostic has been run and passed.
The History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The DTC can be cleared by using the scan tool.
Diagnostic Aids
Check for the following conditions:

Poor connection at the PCM. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the IAT display on the scan tool while moving connectors and wiring harnesses related to the IAT sensor. A change in the IAT display will indicate the location of the malfunction.
Skewed or mis-scaled IAT Sensor. Refer to Temperature vs Resistance table.
If DTC P0112 cannot be duplicated, the information included in the Fail Records data can be useful in determining vehicle mileage since the DTC was last set.

[Gmtech1005]

Intake high temperature codes are caused by low resistance, intake low temp codes are caused by high resistance. Now, did you mean you threw a high temperature code, or a high resistance code? because they are different diagnostic charts.

[Dominic]

If its low resistance, high temp, you might just have a short going across the terminals bypassing the actual sensor.

Try cleaning it?