what is the ambient air temperature sensor function
Making the world better, one answer at a time. The Ambient Temperature sensor collects the information about the outside air temperature and feeds it to the ECU. This information is needful coz the air to fuel ratio is decided and fed to the engine accordingly. I have a 2003 Maxima SE. The ambient air temp sensor is yellow and it is located inside the grill under the hood latch-between the round bells for the horn.