P1109 Chevrolet HO2S22 Sensor Circuit Voltage Too Low Air Leak

P1109 Chevrolet HO2S22 Sensor Circuit Voltage Too Low Air Leak

Possible causes
– Faulty HO2S22 Sensor
– HO2S22 Sensor harness is open or shorted
– HO2S22 Sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)