P0111

Test 1 - Test 2:

Test 3 - Test 6:

Test 5 - Test 8:

SYMPTOM
P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE

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 calibrated temperature amount of the other two temperature sensors an error is detected. Two Trip Fault.

POSSIBLE CAUSES
- Good Trip equal to zero
- (K21) IAT signal circuit shorted to battery voltage
- IAT sensor voltage below 1.0 volts
- (K21) IAT signal circuit open
- (K4) Sensor ground circuit open
- (K21) IAT signal shorted to ground
- (K21) IAT signal circuit shorted to (K4) sensor ground
- PCM high
- PCM low