Circuit Description

Refer to DTC P0125 on page DI-45.


DTC Detecting Condition

Trouble Area


Response time for the oxygen sensor's voltage output to change from rich to lean, or from lean to rich, is 0.4 sec. or more during constant vehicle speed after the engine is warmed up

(2 trip detection logic)

• Open or short in heated oxygen sensor circuit

• Heated oxygen sensor

• Air induction system

• Fuel pressure

Sensor 1 refers to the sensor closer to the engine body.

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