P1104 Chevrolet HO2S12 Sensor Circuit Voltage Too Low Air Leak
Possible causes
– Faulty HO2S12 Sensor
– Exhaust leak near HO2S12 Sensor
– HO2S12 Sensor harness is open or shorted
– HO2S12 Sensor circuit poor electrical connection
– Exhaust leak near HO2S12 Sensor
– HO2S12 Sensor harness is open or shorted
– HO2S12 Sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)