Circuit Description

Refer to DTC P0125 on page DI-45.


DTC Detecting Condition

Trouble Area

P0135 P0141

When the heater operates, heater current exceeds 2 A (2 trip detection logic)

• Open or short in heater circuit of heated oxygen sensor

• Heated oxygen sensor heater


Heater current of 0.2 A or less when the heater operates (2 trip detection logic)


• Bank 1 refers to the bank that includes cylinder No.1.

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

• Sensor 2 refers to the sensor farther away from the engine body.

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