Code Definition

P1163 — Heated Oxygen Sensor 1 lean shift Bank 2

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Nissan

About P1163

P1163 is a manufacturer-specific powertrain diagnostic trouble code recorded for Nissan vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1163 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.

P1163 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

Heated oxygen sensor 1 is the front, pre catalyst oxygen sensor, and this code applies to the sensor on bank 2. It compares oxygen in the exhaust against outside air, generating roughly 1V under rich conditions and near 0V under lean conditions, and the ECM uses the signal to trim injection and hold the air fuel ratio near stoichiometric. DTC P1163 is a lean shift monitoring fault for bank 2, set when the front sensor signal stays biased low, meaning it does not swing rich enough or its switching point has shifted lean. This is usually caused by an aged or contaminated front sensor on bank 2, ...

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