B1121 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1121 – Left Air Bag Satellite Sensor
B1121 Possible Symptoms
Air Bag Warning Light ON
B1121 Possible Causes
Faulty Left Air Bag Satellite Sensor,Left Air Bag Satellite Sensor harness is open or shorted,Left Air Bag Satellite Sensor circuit poor electrical connection
When the Air Bag Diagnosis Sensor Unit (ACU) define the both signal voltage of the ?????sensor and the Safing sensor to be that of the collision which exceeds the specified level, the driving circuit switches on and feeds the electric ignitor of both the side air bag and curtain air bag. The Satellite Sensor is an integrated type of the G sensor element for side collision with output terminals for signal voltage.