Cruze

DTC P0112, P0113, or P0114

The intake air temperature (IAT) sensor is a variable resistor. The IAT sensor has a signal circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM) supplies 5 V to the IAT signal circuit, and a ground for the IAT low reference circuit.

P0112 00 and P0113 00

P0114 00

P0112 00

The ECM detects that the IAT sensor voltage is less than 0.15 V for greater than 0.1 s.

P0113 00

The ECM detects that the IAT sensor voltage is more than 4.85 V for greater than 0.1 s.

P0114 00

The ECM detects that the IAT sensor signal has abruptly changed a minimum of 10°C (18°F) warmer or colder for greater than 2 s.

DTCs P0112 00, P0113 00 and P0114 00 are Type B DTCs.

DTCs P0112 00, P0113 00 and P0114 00 are Type B DTCs.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Air Inlet System Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. If the ignition has been OFF for 8 h or greater, the IAT, the ambient air temperature, and the engine coolant temperature (ECT) should be within 9°C (16°F) of each other. Ignition ON, observe the scan tool IAT Sensor, Ambient Air Temperature, and the ECT Sensor 1 parameters. Compare those sensor parameters to each other to determine if the condition is current.
2. Engine running, observe the scan tool IAT Sensor parameter. The reading should be between -38 to +149°C (-38 to +300°F) depending on the current ambient temperature and the vehicle operating conditions.
3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

1. Ignition OFF, disconnect the harness connector at the B66 Intake Air Temperature Sensor.
2. Ignition OFF for 90 s, test for less than 5 Ω between the low reference circuit terminal B and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

3. Ignition ON, verify the scan tool IAT is colder than -39°C (-38°F).

⇒	If greater than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.

4. Install a 3 A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool IAT Sensor is greater than 130°C (266°F).

⇒	If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

5. If all circuits test normal, test or replace the B66 Intake Air Temperature Sensor.

Static Test

Measure and record the resistance of the B66 Intake Air Temperature Sensor at various ambient temperatures, then compare those measurements to the Temperature Versus Resistance : IAT → ECT table.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.