What does code P1163 mean on Honda vehicles?
The ECU detects a slow response from the primary heated oxygen sensor (HO2S No. 1), delaying air-fuel mixture correction.
OBD-II Code Honda
P1163 — Honda — Primary HO2S (No. 1) Circuit Slow Response
The ECU detects a slow response from the primary heated oxygen sensor (HO2S No. 1), delaying air-fuel mixture correction.
Common symptoms
- Slow mixture adjustment
- reduced fuel efficiency
Possible causes
- Aged or contaminated oxygen sensor
Initial recommendation
Replace primary oxygen sensor to restore proper response.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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