Code Definition

P0162 — O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0162

P0162 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0162 is stored, the module has detected a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0162 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0162 fault code is set when the Engine Control Module (ECM) detects a malfunction in the circuit of the oxygen sensor located in Bank 2, Sensor 3. This sensor is typically found downstream in the exhaust system and is often used in vehicles with multiple catalytic converters or complex emission control systems. The malfunction could involve the sensor not producing the expected voltage range or issues with the wiring or connectors linking the sensor to the ECM. The ECM uses this sensor to accurately monitor the exhaust gas composition, especially for efficient operation of the catalytic c...

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