Ford P0159 OBD-II Trouble Code Definition: P0159 HO2S22 Slow Response P0159 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0159 O2 Sensor Circuit Slow Response What does the code mean? OBD-ii Code P0159 definition: This involves the rear oxygen sensor on the passenger side. This code indicates the engine air fuel ratio is not being adjusted by […]