What causes P1165 on a Honda?

Aged front air fuel sensor Exhaust leak ahead of the sensor Damaged sensor wiring or plug Vacuum leak at intake hoses Weak fuel pressure from pump or filter

How do I fix P1165 on a Honda?

Scan freeze frame and record fuel trim Inspect exhaust manifold for leaks Check sensor wiring and plug for damage Test for intake vacuum leaks Replace the front air fuel sensor if tests point to it

P1165 Front air fuel sensor range problem on Bank 1 Sensor 1

Q: What does P1165 mean on a Honda?

P1165. Front air fuel sensor range problem on Bank 1 Sensor 1. Applies to 1998 to 2002 Accord, Civic and CR-V with 4 cylinder VTEC.

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: 1998 to 2002 Accord, Civic and CR-V with 4 cylinder VTEC

What does P1165 mean on a Honda?

P1165. Front air fuel sensor range problem on Bank 1 Sensor 1. This Honda-enhanced code applies to 1998 to 2002 Accord, Civic and CR-V with 4 cylinder VTEC.

Common causes of P1165

Aged front air fuel sensor
Exhaust leak ahead of the sensor
Damaged sensor wiring or plug
Vacuum leak at intake hoses
Weak fuel pressure from pump or filter

How to fix P1165

Scan freeze frame and record fuel trim
Inspect exhaust manifold for leaks
Check sensor wiring and plug for damage
Test for intake vacuum leaks
Replace the front air fuel sensor if tests point to it

Sources and review

Last updated 2026-09-24.