Possible causes – Faulty HO2S Bank 1 Sensor 1– 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) HYUNDAI Related P1134 code 2002 HYUNDAI SONATA Engine And Engine Cooling:engine 2003 HYUNDAI TIBURON Engine And…