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Symptom: P0112-INTAKE AIR TEMP SENSOR VOLTAGE TOO LOW When Monitored and Set Condition: P0112-INTAKE AIR TEMP SENSOR VOLTAGE TOO LOW When Monitored: With the ignition on and battery voltage greater than 10.4 volts. Set Condition: The Intake Air Temperature (IAT) Sensor circuit voltage at the PCM goes below 0.8 of a volt. POSSIBLE CAUSES IAT SENSOR VOLTAGE BELOW 1.0 VOLT IAT SENSOR (K21) IAT SENSOR SIGNAL CIRCUIT SHORTED TO GROUND (K21) IAT SENSOR SIGNAL SHORTED TO (K900) SENSOR GROUND CIRCUIT PCM TEST ACTION APPLICABILITY 1 Ignition on, engine not running. t, read DTCs and record the related Freeze Frame data. With the DRBIII t, read the IAT Sensor voltage. Is the voltage below 1.0 volt? All Yes → Go To 2 No → Refer to the INTERMITTENT CONDITION Symptom (Diagnos- tic Procedure). 2 Turn the ignition off. t, read IAT Sensor voltage. Is the voltage above 1.0 volt? All Yes → Replace the IAT Sensor. Perform POWERTRAIN VERIFICATION TEST VER - 5. No → Go To 3 3 Turn the ignition off. All Yes → Repair the short to ground in the (K21) IAT Sensor Signal circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5. No → Go To 4 35 DRIVEABILITY - GAS |