Code Definition

P1169 — Primary Heated Oxygen Sensor (#1) high input, or bank 2 fuel trim too rich during deceleration

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

About P1169

P1169 is a manufacturer-specific powertrain diagnostic trouble code recorded for Honda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1169 is stored, the module has detected a signal or supply voltage higher than the expected operating range; 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.

P1169 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

DTC P1169 is a Honda specific code covering two related conditions on bank 2, a primary, or upstream, Air Fuel Ratio sensor (Sensor 1) signal reading higher than the valid range, or the bank 2 mixture being detected too rich during deceleration. The Powertrain Control Module (PCM) monitors the sensor circuit voltage and the mixture on overrun, and sets P1169 when the input rises above the expected threshold or when the bank stays rich while the PCM is leaning or cutting fuel. A high input generally indicates a short to voltage, a lost ground, or a failed sensor, while a true rich on decelerati...

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