P0112 – Intake Air Temperature (IAT) Circuit Low Input

P0112 – Intake Air Temperature (IAT) Circuit Low Input

Indicates the sensor
signal is less than Self-Test minimum. The IAT sensor minimum is 0.2 volts or 121°C (250°F).

Possible Causes

●● Grounded circuit in
harness
● Damaged sensor
● Improper harness connection
● Damaged PCM

Diagnostic Aides

■ Using signal simulation,
disconnect sensor and simulate 1.0V on sensor signal circuit. Simulated 1.0V signal and scan PID voltage value should be similar. If voltage is similar check sensor, if voltage is not similar check related circuit and PCM.

 

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P0112 – Intake Air Temperature (IAT) Circuit Low Input

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