P1118 FORD - MANIFOLD ABSOLUTE TEMPERATURE CIRCUIT LOW INPUT
POST UPDATED IN February, 2023
P1118 FORD - MANIFOLD ABSOLUTE TEMPERATURE CIRCUIT LOW INPUT
The IAT (Intake Air Temperature Sensor) measures the temperature of the air entering the engine. Since cold air has a higher density than hot air, it is possible to accumulate colder the hot air in a given volume, thus allowing the Powertrain Control Module (PCM) to continuously adjust the fuel to ensure an ideal air/fuel ratio.
The inlet air temperature sensor during operation reacts to the temperature of the air passing over it. Thus, it generates a signal voltage strictly related to the temperature passing over it at a certain time. Generally, these sensors have their resistance increase as the air passing over it cools down and if the opposite occurs, the resistance will decrease.
The P1118 OBDII fault code for Ford vehicle manufacturers occurs when a lower than expected signal is detected in the Intake Air Temperature Sensor circuit.
The reasons why the P1118 OBD2 diagnostic code is set on Ford vehicles are:
The steps to resolve the DTC P1118 OBDII code on your Ford are as follows: