Possible causes

– Faulty Intake Air Temperature (IAT) sensor
– Dirty air filter
– Intake Air Temperature (IAT) sensor harness is open or shorted
– Intake Air Temperature (IAT) sensor circuit poor electrical connection

When is the code detected?

An excessively low or high voltage from the sensor is sent to ECM.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0111 Description

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM). The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

P0111 Information for specific makes

P0111 SUBARU
P0111 HONDA
P0111 ACURA
P0111 BMW
P0111 CHRYSLER
P0111 DODGE
P0111 JEEP
P0111 FORD
P0111 HYUNDAI
P0111 LEXUS
P0111 TOYOTA
P0111 MAZDA
P0111 MITSUBISHI
P0111 VOLKSWAGEN
P0111 AUDI
P0111 JAGUAR