P0160 - O2 SENSOR CIRCUIT NO ACTIVITY (B2S2)

The Diagnostic code P0160 OBD2 means that the Powertrain Control Module(PCM) has detected a fault in the Oxygen (O2) Sensor number 2 circuit that is located on bank number 2.

The Oxygen (O2) Sensor varies its 5-volt reference supplied by the Powertrain Control Module (PCM), taking into account the oxygen content of the exhaust. This variation can range from 0.1 to 0.9 volts. If there is a rich exhaust, the voltage is high, and if it is poor, the voltage is low.

The pre-catalyst oxygen sensors can change the voltage quickly once or twice a second, but the Oxygen Sensor (O2) number 2 is a post-catalyst sensor, it is normal that it changes more slowly and does not vary the reference voltage so much. In case the O2 sensor is not detected for a certain time, the DTC code P0160 will be set.

• Check Engine light on.
• Lowers fuel economy.

The reasons to establish the fault code P0160 are

• There may be holes in the exhaust.
• Oxygen (O2) sensor number 2 cables or connectors in poor condition.
• Oxygen Sensor (O2) number 2 may be defective.

When facing the code P0160 OBDII, you must do this to repair it:

• The first thing is to check that there are no holes in the exhaust. If there are holes, make the necessary repairs.
• Check the cables and connectors leading to Oxygen (O2) Sensor number 2 located in bank number 2. You have to be sure they are good, not worn, or rubbing against any other components. Repair or replace them if you consider it is necessary.
• Replace the O2 Sensor.