U1008 Code: Meaning, Causes, and Symptoms | OBD2 Codes

U1008 – Lost Communication with Radiator Shutter


U1008 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


U1008 Possible Causes


Faulty Active Air Flap (AAF) system,Engine Control Module (ECM) np communication with Active Air Flap (AAF) system,Active Air Flap (AAF) system harness is open or shorted,Active Air Flap (AAF) system poor electrical connection


U1008 Description


Lost Communication with Radiator Shutter also known as Active Air Flap. Active Air Flap (AAF) system is equipped with a flip can be opened between radiator grille and radiator. During High speed driving, it will enhance the driving stability by closing the flap to reduce the air resistance. The Engine Control Module (ECM) will open the flap function if the inside the engine room temperature rises. The ECM sets the OBDII code when the Active Air Flap (AAF) system is not working to factory specifications.