P0111 INTAKE AIR TEMPERATURE (IAT) SENSOR RATIONALITY
When Monitored and Set Condition:
When Monitored: While the engine is running.
Set Condition: The ECM does not read a change in value from the sensor over time.
- FAILED IAT SENSOR
- INTERMITTENT CONDITION
NOTE: Refer to VERIFICATION TESTS for appropriate verification test procedures.
Remove the temperature sensor and reconnect the wiring to the sensor. Monitor DRBIII®, while heating the sensor with an external heat source (DO NOT USE OPEN FLAME). Does the reading from the sensor increase at least 5 degrees F. on the DRB?
Yes --> Refer to the SYMPTOM: INTERMITTENT CONDITION Symptom (Diagnostic Procedure). Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No --> Replace the Intake air temp sensor/MAP sensor. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).