What does code 23 mean on 2001 ford Windstar?

Code 23 on a 2001 Ford Windstar typically indicates a problem with the intake air temperature (IAT) sensor. This sensor measures the temperature of the air entering the engine, which is crucial for optimizing fuel mixture and engine performance. If the IAT sensor is malfunctioning or reading incorrectly, it can lead to poor engine performance and increased emissions. It's advisable to check the sensor and its wiring for faults, and replace it if necessary.