P0111

Test 1 - 5:

Test 6 - 8:

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
- 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