P1103 Buick HO2S Heating Circuit Bank 1 Sensor 1 Voltage Too Low
Possible causes
– Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
– HO2S Bank 1 Sensor 1 blown fuse
– HO2S Bank 1 Sensor 1 harness is open or shorted
– HO2S Bank 1 Sensor 1 circuit poor electrical connection
– HO2S Bank 1 Sensor 1 blown fuse
– HO2S Bank 1 Sensor 1 harness is open or shorted
– HO2S Bank 1 Sensor 1 circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera