Ford P1101 OBD-II Trouble Code Definition: P1101 HO2S11 Sensor Circuit Voltage Too Low Air Leak P1101 Ford OBD-II Trouble CodeDescription: Causes – Faulty HO2S11 Sensor– Exhaust leak near HO2S11 Sensor– HO2S11 Sensor harness is open or shorted– HO2S11 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) […]