Oxygen (O2) Sensor

The oxygen sensor detects oxygen content of exhaust gases and sends signal to ECU, which varies air/fuel ratio to maintain a 14.7:1 ratio under most conditions. This ratio is most efficient for combustion and catalytic converter operation.

Accord and Prelude 2.1L models use heated oxygen sensors. Prelude 2.0L SFI models use 2 non-heated oxygen sensors. All other models use a single non-heated oxygen sensor