Ford P0134 OBD-II Trouble Code Definition: P0134 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 P0134 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0134 O2 Sensor Circuit No Activity Detected What does the code mean? OBD-ii Code P0134 definition: This code definition:the front oxygen sensor on Bank 1. Basically the oxygen sensor is inactive. […]