Code Definition

P1163 — Primary Heated Oxygen Sensor (#1) slow response

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

About P1163

P1163 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 P1163 is stored, the module has detected a signal or supply voltage lower than the expected operating range; 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

DTC P1163 is a Honda specific code indicating the primary, or upstream, Heated Oxygen Sensor (Sensor 1) is responding too slowly to changes in exhaust oxygen content. The Powertrain Control Module (PCM) measures the time the sensor takes to react when fuelling is changed, and a response slower than the calibrated limit means the sensor can no longer support precise closed loop control. The usual cause is an aged or contaminated sensor or a heater that no longer brings the element fully up to temperature, though an exhaust leak near the sensor can produce the same lazy result. With this code se...

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