OBD-II Code
P1163
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$80–$520
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P1163 on Honda is an A/F (wideband) Sensor Range/Performance fault on Bank 1 Sensor 1, set when the sensor's reported lambda or equivalence ratio behaves outside the expected envelope under stable conditions, distinct from a heater fault (P1166) or a hard electrical fault.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP1163 on Honda is an A/F (wideband) Sensor Range/Performance fault on Bank 1 Sensor 1, set when the sensor's reported lambda or equivalence ratio beh…
P1163 on Honda is an A/F (wideband) Sensor Range/Performance fault on Bank 1 Sensor 1, set when the sensor's reported lambda or equivalence ratio behaves outside the expected envelope under stable conditions, distinct from a heater fault (P1166) or a hard electrical fault. Honda's wideband sensor reports a continuously variable signal proportional to oxygen content; the PCM compares short-term and long-term fuel trims against AFR output, and when the sensor goes lazy (slow response), pegged-rich, or pegged-lean for several drive cycles, P1163 sets.
Cheapest ladder
- clear codes and pull HDS freeze frame to see whether trims were positive or negative when the code set, then with the engine at operating temperature monitor AFR sensor voltage at 2500 rpm steady (should sit very near 3.0 to 3.3V on Honda's wideband scaling).
- Inspect the sensor and connector for oil contamination from a leaky valve cover gasket, which kills wideband sensors quickly.
- Verify no vacuum leaks with smoke or carb cleaner around intake gaskets and check fuel pressure (K24 spec roughly 50 to 55 psi at idle, J35 roughly 48 to 55 psi).
- The expensive misdiagnosis is replacing the AFR sensor (around $200 to $300 OE Denso) when the true fault is a vacuum leak skewing actual AFR, a clogged fuel filter dragging pressure low, or oil contamination from an upstream gasket leak that will kill the new sensor in weeks.
Vehicle-specific patternsHonda K24A K-series (Accord, CR-V, Element 2003-2011) sees P1163 commonly from VTC actuator wear that introduces cam-timing scatter at idle, which th…
Honda K24A K-series (Accord, CR-V, Element 2003-2011) sees P1163 commonly from VTC actuator wear that introduces cam-timing scatter at idle, which the wideband sees as erratic AFR. Honda J35 V6 (Accord, Odyssey, Pilot, Ridgeline 2003-2014) sets P1163 from the front-bank AFR sensor failing in VCM-equipped engines because cylinder deactivation cycles thermal-shock the sensor.
- 2002-2005Honda K20A3 Civic Si and base sees P1163 from oil contamination via PCV system overflow.
- 2006-2011Honda R18 1.8L Civic typically sets P1163 from a failing sensor by 100k miles.
Estimated repair$80 to $520.
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