P0111

Test 1 - Test 2:

Test 3 - Test 7:

Test 8 - Test 9:

SYMPTOM
P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE

WHEN MONITORED
The engine off time is greater than 480 minutes. Ambient Temperature is greater than 4 deg C (38 deg F).

SET CONDITION
After a calibrated amount of cool down time the PCM compares the ECT Sensor, IAT Sensor, and the Ambient Air Temp Sensor values. The IAT Sensor value is not within -10 deg C (18 deg F) of the other two temperature sensors. Two Trip Fault.

POSSIBLE CAUSES
- Good trip equal to zero
- (K21) IAT signal circuit shorted to battery voltage
- IAT sensor
- (K21) IAT signal circuit open
- (K900) Sensor ground circuit open
- (K21) IAT signal circuit shorted to ground
- (K21) IAT signal circuit shorted to the (K900) sensor ground
- PCM