P0156 P0156 trouble code definition Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) What the P0156 code means The purpose of the oxygen sensor is to monitor the amount of oxygen present in the exhaust and relay this information to...
Hello, thank you for writing in. A P0156 troubleshooting code stands for an error with the oxygen sensor. There are multiple sensors, and this one is behind (further towards the rear) the catalytic converter. Several things may be happening. First,...
