General Information

Component Location





General Description

The normal operating temperature of the HO2S (Heated Oxygen Sensor) ranges from 350 to 850°C (662 to 1562°F). The HO2S heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description

Checking current from HO2S under detecting condition, if the heater current is below a certain threshold for more than predeterminate time, PCM sets P0056. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.

DTC Detecting Condition





Specification

(Reference only)






Schematic Diagram










Signal Waveform