Ford P1134 OBD-II Trouble Code Definition: P1134 HO2S Transition Time Ratio Sensor 1 P1134 Ford OBD-II Trouble CodeDescription: Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1134 OBD Code Description HO2S Transition Time Ratio Sensor 1 is one of the definitions for the P1134; however your vehicle’s manufacturer may have a different definition […]