P0111

Test 1:

Tests 2 - 5:

Tests 6 - 8:

Test 9:

SYMPTOM
P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE

TEST NOTE
This symptom is diagnosed using the test P0110-INTAKE AIR TEMPERATURE SENSOR STUCK.

WHEN MONITORED
Engine OFF time is greater than 480 minutes. Ambient temperature is greater than 4 °C (39 °F).

SET CONDITION
After a calibrated amount of cool down time, the PCM compares the ECT Sensor, IAT Sensor and the Ambient Air Temperature Sensor values. If the IAT Sensor value is not within 2 °C (18 °F) of the other two temperature sensors an error is detected. Two Trip Fault.

POSSIBLE CAUSES
- Intermittent condition
- IAT sensor signal circuit shorted to battery voltage
- IAT sensor voltage below 1.0 volts
- IAT sensor signal circuit open
- Sensor ground circuit open
- IAT sensor signal shorted to ground
- IAT signal circuit short to sensor ground
- PCM high
- PCM low